Modems Model 2240 Fiber Optic Modem Users Manual
Canoga Perkins Caution! This product may contain a laser diode emitter operating at a wavelength of 1300 nm - 1600 nm. Use of optical instruments (for example: collimating optics) with this product may increase eye hazard. Use of controls or adjustments or performing procedures other than those specified herein may result in hazardous radiation exposure. Under normal conditions, the radiation levels emitted by this product are under the Class 1 limits in 21 CFR Chapter 1, Subchapter J.
2240 Fiber Optic Modem Notice! Canoga Perkins has prepared this manual for use by customers and Canoga Perkins personnel as a guide for the proper installation, operation and/or maintenance of Canoga Perkins equipment. The drawings, specifications and information contained in this document are the property of Canoga Perkins and any unauthorized use or disclosure of such drawings, specifications and information is prohibited.
Canoga Perkins Model 2240 Fiber Optic Modem 4
2240 Fiber Optic Modem Table of Contents 1. Description ......................................................11 1.1 2240 Modem ................................................................ 11 1.1.1 Functions, LEDs and Switches ............................................. 12 1.2 2201 Rack Chassis ......................................................13 1.3 2202 Modem Shelf ......................................................13 1.4 Modem Operation .....................................................
Canoga Perkins 3. Mode and Rate Selection.............................. 29 3.1 Operating Mode / Data Rate Selection .....................29 3.2 External Clock Modes ................................................31 3.2.1 Sampled External Clock Mode - Mode 0 ............................... 31 3.2.2 Locked External Clock Mode - Mode 7 ................................. 32 3.3 Internal Clock Modes - Modes 1, 2, 3, 4 ...................32 3.3.1 Standard Internal Clock Rates (Groups 1, 2 and 3) ...............
2240 Fiber Optic Modem 4.4.3 DSR Jumper .......................................................................... 4.4.4 CHASSIS_GND Jumper ...................................................... 4.4.5 SCT Switch ........................................................................... 4.4.6 CTS_GATE Jumper .............................................................. 4.4.7 CTS_OUT Jumper ................................................................ 4.4.8 CTS (A) Jumper ...............................
Canoga Perkins 4.9.2 4.9.3 4.9.4 4.9.5 4.9.6 4.9.7 Generic Interface .................................................................. External Station ..................................................................... Internal ................................................................................. External ................................................................................. DTE Adapter ......................................................................... Legacy Adapter ....
2240 Fiber Optic Modem List of Figures 1-1 1-2 1-3 1-4 Model 2240 Modem .......................................................................................... Model 2201 Rack Chassis ................................................................................. Model 2202 Modem Shelf ................................................................................. 2240 Functional Block Diagram ......................................................................
Canoga Perkins List of Tables 1-A Control Leads Available................................................................ 12 2-A Link Loss Range ............................................................................ 22 3-A 3-B 3-C 3-D 3-E 3-F Mode Switch Positions ................................................................... 30 Locked External Rates .................................................................. 30 Standard Internal Clock Rates ..............................................
2240 Fiber Optic Modem 1. Description 1.1 2240 Modem The 2240 is a full-featured modem for full-duplex operation over fiber optic cable. The 2240 is available in Standalone and Rack-Mount models. Figure 1-1. Model 2240 Modem The 2240 modem operates at speeds from DC (0 bps) to 1.500 Mbps in asynchronous mode, 0 bps to 2.050 Mbps in synchronous mode (depending on the Rate and Mode selection refer to Section 3), including the common rates of 1.536 Mbps, 1.544 Mbps, and 2.048 Mbps.
Canoga Perkins Various configurations of the 2240 provide local and end-to-end modem controls including those listed in Table 1-A. Data / Clock Controls Send Data Receive Data Send Timing Receive Timing Terminal Timing Request to Send Clear To Send Data Set Ready Data Carrier Detect Local Test Remote Test Sec. Request to Send Sec. Data Carrier Detect Data Terminal Ready Ring Indicator 1.1.
2240 Fiber Optic Modem 1.2 2201 Rack Chassis The 2201 Rack Chassis (see Figure 1-2) is designed to accommodate up to ten 2200 series modems, except for the MC1 and MC2 interfaces. For the Model 2240 Modem with MC1 and MC2 interfaces, only five modems may be installed in the Rack Chassis. The 2201 Rack Chassis offers a variety of features including local audible / visible and remote power failure alarms, optional redundant power supply. Rack-mount modems are hot-swappable. Figure 1-2.
Canoga Perkins Figure 1-3. Model 2202 Modem Shelf 1.4 Modem Operation 1.4.1 General The 2240 Modem can use an external clock, provide the master clock, or one end can be slaved to the other for either of these cases. The electrical connection between the data equipment and the 2240 Modem differs from model to model depending on which interface is employed (modem is usually DCE). The electronic conversion from voltage level to optical signal level is similar in all applications.
2240 Fiber Optic Modem Figure 1-4.
Canoga Perkins The modem functions as a 10-channel multiplexer. The following discussion assumes an 8.19 MHz composite. Lower composite speeds result in proportionally lower submultiples. Clock and data are carried on a 4.096 Mbps and 2.048 Mbps channel, respectively. Each of the three control leads and five Auxiliary lines are carried on a 64 kbps channel. The remaining 1.536 kbps bandwidth splits into 1.
2240 Fiber Optic Modem The heart of the 2240 transmitter is a ten-channel multiplexer. This multiplexer takes the clock, data and control lead inputs from the interface, multiplexes them, then adds framing and supervisory information. This composite data is then converted into a Manchester-coded signal which drives the modulator of the optical transmitter. The function of the multiplexer is highly dependent on the operating mode of the modem (refer to Section 3).
Canoga Perkins 1.4.7 Fiber Optics Each interface signal input to the modem is converted to logic level for use by the modem circuit. The logic level signal is then multiplexed and encoded into a biphase data stream, which in turn is converted to optical signal level for transmission over the fiber optic cable. 1.5 Loss Budget The maximum possible transmission distance is dependent on the overall power loss over the fiber optic link. This is called the link loss.
2240 Fiber Optic Modem 2. Installation and Setup 2.1 Installation Installation for the 2240 Fiber Optic Modem includes unpacking the unit, and considerations for installing the standalone and rackmount models. 2.1.1 Unpacking the Unit Each 2240 Modem is shipped factory tested, and packed in protective cartons. Unpack the unit and retain the shipping carton and protective packing for reuse in the event a need arises for returning it to the factory.
Canoga Perkins 2.1.3 Rack-Mount Modem Installation The 2201 Rack Chassis is designed for installation in a standard 19-inch wide equipment rack. Tabs are provided on each side of the unit, and are predrilled for standard spacing. Refer to the 2201 Rack Chassis User Manual for more information on installing a 2201. When installing a modem or panel, the Nylatch retainer should be in an outward, or released condition.
2240 Fiber Optic Modem 2.1.5 2202 Modem Shelf Installation The 2202 Modem Shelf is mounted in an equipment rack. Two 2200 Series standalone modems may be installed in the 2202, side-by-side on the shelf. Refer to the 2202 Modem Shelf User Manual for more information about installation. 2.1.6 Custom Oscillator Installation The third oscillator on the main 2240 board can be installed or changed to allow the use of Group 4 Internal Clock Rates.
Canoga Perkins 2.2 Setup The setting up of the 2240 Modem includes the two-section HI / LO optic power switch, internal control switches and the signal ground strap. The setup, as described in the following sections, provides the initial configurations for operation of the unit. 2.2.1 HI / LO Optic Power Switch All versions, except for ELED and LP Lasers models, incorporate an optic power level dual DIP switch for varying the transmit power of the fiber optic LED or Laser (see Figure 2-1).
2240 Fiber Optic Modem 2.2.2 Internal Control Switches An 8-position DIP switch located on the modem board provides access for internal control options (see Figure 2-3). Switch positions 1 through 6 provide the following options: • • Carrier Detect (CD) Signal Options (1 and 2) Clocking Options (7 and 8) External Clock Mode, switch position 7, and the Divide Ratio Table Select, switch position 8, are described in Section 2.2.2.2. NOTE: The nomenclature used for this switch is "off" equals "open.
Canoga Perkins 2.2.2.1 Carrier Detect (CD) Signal Options There are two switches on the internal switch block which control the response of the CD signal on the Standard Data Interfaces. These switches operate as a pair and only one switch should be set to ON at any time. Factory Setting = CD / DCD set to OFF CD / SYNC set to ON The CD signal may be used as an output for an end-to-end Control Channel by setting the CD / DCD switch to ON and the CD / SYNC switch to OFF.
2240 Fiber Optic Modem 2.2.2.2 Internal Clock Option Switches There are two switches on the Internal switch block which affect the operation of the Clock circuits: • • TBL / NORM CLK / EXT 2.2.2.2.1 TBL / NORM Switch The TBL / NORM switch controls the Data Rate Table as indicated in Table 3-D. It is configured as ON when shipped from the factory. If it is switched to OFF, the alternate Divide Ratios become active. Factory Setting = ON 2.2.2.2.
Canoga Perkins 2.2.3 Signal Ground Strap The jumper selects whether chassis ground is connected directly to signal ground (CHASSIS position) or signal ground is separated from chassis ground (FLOAT position). NOTE: Float can be overridden by chassis ground jumpers on interface cards or by a jumper in the 2201 Rack Chassis.
2240 Fiber Optic Modem 2.2.5 EXTRA CLOCK Jumper This two-pin jumper (W26, labeled XTCLK), in conjunction with the enhanced interfaces (- 422, - 436 and - 430), allows the 2240 to accept BOTH customer clocks for tail circuit applications. Refer to the RS-449, V.35 and RS-530 interface sections for more information on the enhanced interfaces. This jumper causes the 2240 to shift data out (RXD) from the 2240 in sync with either the 2240's SCR (present operation) or the extra clock pins on enhanced interfaces.
Canoga Perkins Enhanced 2240 with Extra Clock Customer's T1 CSU/DSU PLL RT TT TX OPTICS FIFO CONTROL WR DI R FIFO RD SD ST X FIFO CONTROL RD W SD RD DO DI FIBER DO OPTICAL RX RT NOTE 1: X equals the extra clock input pins on the enhanced interfaces. "Extra clock" jumper would have to be ON at this 2240. NOTE 2: Control lead crossovers are not shown for clarity. NOTE 3: 28 The 2240 in the diagram would be operating in Mode 7, with rate set tomatch CSU / DSU speed.
2240 Fiber Optic Modem 3. Mode and Rate Selection 3.1 Operating Mode / Data Rate Selection The 2240 has eight clock operating modes: seven modes for synchronous data transmission and one asynchronous mode. Each synchronous mode is characterized by one of three transmit clock types: External Clock (clocked from customer's equipment), Internal Clock (modem generates Tx clock and RX clock) and Slave Clock (transmit clock same as received from far-end modem).
Canoga Perkins Mode DIP Switches (C) Closed (O) Open 5 6 7 0 C C C 1 2 3 4 5 6 7 O C O C O C O C O O C C O O C C C O O O O Operating Mode Sampled External Clock up to 1.544 Mbps * Internal Clock Group 1 Rate Internal Clock Group 2 Rate Internal Clock Group 3 Rate Internal Clock Group 4 Rate Slave Clock Asynchronous up to 1.500 Mbps * External Clock with Variable Lock Ratios (refer to Table 3-B) Table 3-A.
2240 Fiber Optic Modem DIP Switches (C) Closed (O) Open Rate Table 3-C. Standard Internal Clock Rates 0 1 2 3 4 5 6 7 8 9 Data Rates Normal and Alternate Table Switch (TBL / NORM) set to NORM Rate Switches 1 2 3 4 Group 1 Group 2* Group 3* C O C O C O C O C O 2.048M 1.024M 512K 256K 115.2K** 57.6K** 28.8K** 14.4K** 128K 64K 1.536M 768K 384K 192K 448K 224K 112K 56K 96K 48K 1.544M 19.2K 9.6K 4.8K 153.6K 76.8K 38.4K 19.2K 2.4K 1.
Canoga Perkins NOTE: The pulse distortion is 37% of the bit period at a data rate of 1.544 Mbps. When using this operating mode, it is important to con sider the effect of this large distortion on the connected equipment. Sampled External Clock Mode does not use the Rate Switches. 3.2.2 Locked External Clock Mode - Mode 7 When the customer-supplied clock is within certain ranges, this mode allows transmission of clock and data signals with minimal jitter.
2240 Fiber Optic Modem DIP Switches (C) Closed (O) Open Rate Table 3-D. Group 4 Internal Clock Rate Divide Ratio 0 1 2 3 4 5 6 7 8 9 Rate Switches 1 2 3 4 Group 4 Divide Ratios Normal and Alternate Table NORM (ON) * TBL (OFF) C O C O C O C O C O 4 8 16 32 48 96 192 384 64 128 C C O O C C O O C C C C C C O O O O C C C C C C C C C C O O 16 32 64 128 768 1536 3072 6144 256 512 * Factory setting In Group 4, the Rate Switches select the divider ratio for this oscillator.
Canoga Perkins Table 3-E.
2240 Fiber Optic Modem 3.4 Slave Clock Mode - Mode 5 The Slave Clock Mode is used to provide a clock to the DTE which is identical to the clock received from the other modem. In this mode, the clock signal received from the other end of the link is sent to the DTE on both Receive Timing (RT) and Send Timing (ST) or equivalent signal leads. This mode is typically used in tail circuits where the user’s DCE normally provides both the transmit and receive clocks to the DTE.
Canoga Perkins Figure 3-2. Typical Tail Circuit Implementation Figure 3-3. RS-449 / 422 Null Cable Diagram for 2240 NOTE: If the customer's DCE does not support TT (or equivalent) lead, a buffered interface may be needed to realign the data or the extra clock function may be used (refer to Section 4.9). Canoga Perkins offers a wide selection of buffered interfaces.
2240 Fiber Optic Modem 3.6 Consideration of Propagation Delays Whenever the modem is sending a transmit clock to the DTE, it is important to understand the effect of the time required for that clock to propagate from the modem to the DTE. Clock-to-Data phasing is particularly important in any synchronous data link. The modem expects the data to be valid (unchanging) at the point in time when the clock is transitioning to "clock" the data.
Canoga Perkins 3.7 Internal Clock Option Switches There are two switches on the Internal switch block which affect the operation of the Clock circuits: TBL / NORM and CLK / EXT (see Figures 2-3 and 3-4 for the locations of these switches). 3.7.1 TBL / NORM Switch The TBL / NORM switch controls the Data Rate Table as indicated in Table 3-D. It is configured as ON when shipped from the factory. If it is switched to OFF, the alternate Divide Ratios become active. Factory Setting = ON 3.7.
TX O P T NO RM F LO A T H I/LO W O P TIC S P O W E R SW ITC H E S C H A SSIS TB L/N O R M C LK /E X T A LM /IN V ON O FF O FF ON O FF A LM /LO C A LM /R E M ON O FF A LM /C H A N O FF FA C TO R Y SET C D /S Y N C O FF O N IN TE R N A L O P TIO N S W ITC H E S C D /D C D R TS NC NO R LY A LM A LM + R E S.
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2240 Fiber Optic Modem 4. Data Interfaces 4.1 Data Interfaces Overview A variety of interfaces are available for the 2240 Modem (see following listing). RS-423 / 232 RS-449 RS-449 / RS-423 (MC1) RS-530 TwinAx 422 Twinaxial Mil-Std 188-114C CCITT V.35 Transparent T1 / E1 CCITT V.35 / RS-423 (MC2) Programmable RS-530 TTL / BNC DC-37 Mil-Std 188-114 Each conforms to existing standards. Refer to Section 7, "Specifications," for applicable standards/physical connector types. Refer to Section 7.
Canoga Perkins 4.2 RS-423 / 232D Model 432 NOTE: The maximum data rate for this interface, 153.6 kbps, is limited by the interface driver slew rate. This interface is electrically compatible with EIA RS-423A. It will also operate with RS-232D systems when adhering to the more limiting RS-232D specifications (20 kbps and 2500 pF cable capacitance). EIA standard RS-423A does not reference physical connector types or pinouts.
2240 Fiber Optic Modem Pin Number Table 4-A. RS-232D Pinouts 1 2 3 4 5 6 7 8 12 13 14 15 16 17 18 19 20 21 22 23 24 25 RS-232D Pin Name (abbrev) Direction Full Name PG TD RD RTS CTS DSR SG DCD SDCD SCTS STD SCT SRD SCR LL SRTS DTR RL RI DSRS SCTE TM Protective Ground Transmit Data Receive Data Request to Send Clear to Send DCE Ready Signal Ground Receive Line Sig. Det. Secondary Line Sig. Det.
Canoga Perkins 4.2.1 RTS_BIAS Jumper The RTS_BIAS jumper controls the state that RTS floats to when there is no signal driving the RTS pin. The OFF position forces this signal to the OFF (negated) state when the interface cable is disconnected. The ON position forces it to the ON (asserted) state. Factory Setting = OFF 4.2.2 DCD Jumper The DCD Jumper determines the source of the DCD output. In the CTRL position, the DCE output functions as the output for the RTS input at the far end.
2240 Fiber Optic Modem 4.2.4 DSR Jumper The DSR jumper controls the behavior of the DSR signal. The EIA position causes the DSR to turn OFF in certain test conditions when the transmit data is blocked and has no end-to-end or loopback path. This condition exists when the far-end 2240 modem has a local loopback active. The TEST position causes DSR to turn OFF (negate) whenever any loopback is active at one or both modems. Factory Setting = EIA 4.2.
Canoga Perkins Pin Number A/B RS-449 PIN Name (abbrev) 1 4/22 5/23 6/24 7/25 8/26 9/27 10 11/29 12/30 13/31 14 15 17/35 18 19 20 33 34 37 2/36* SHLD SD ST RD RS RT CS LL DM TR RR RL IC TT TM SG RC SQ NS SC N/A Direction (full name) shield send data send timing receive data request to send receive timing clear to send local loopback data mode terminal ready receiver ready remote loopback incoming call terminal timing test mode signal ground receive common signal quality new signal send common extra cloc
2240 Fiber Optic Modem The SD, RD, ST, RT and TT pins carry the primary data and clock signals (conforming to the RS-449 and RS-422 standards). In addition, an extra clock signal input (conforming to RS-422) is provided to make the 2240/-422 combination more "DTE-like" in tail circuit applications at the clock source end (refer to Section 2.2.6). The remainder of the pins are either ground references or control signals.
Canoga Perkins Local Loopback (LL) and Remote Loopback (RL) are loopback control leads and perform the same functions as the 2240 front panel LOOP switch LOC and REM positions. LL and RL are interface signal inputs which can be used to activate the LOC or REM loop functions. These signals can control the loopback functions only if the front panel switch is in the center OFF position. 4.3.1 RS_BIAS Jumper The RS_BIAS jumper controls the state that RS floats to when there is no signal driving the RS pin.
2240 Fiber Optic Modem 4.3.4 DM Jumper The DM jumper controls the behavior of the DM signal. The EIA position turns DM OFF when the far-end 2240 modem has a local loopback active. The TEST position causes DM to turn OFF whenever any loopback is active at one or both modems. Factory Setting = EIA 4.3.5 CH_GND Jumper The jumper selects whether chassis ground is connected directly to signal ground (SHORT position) or through a 100 Ohm resistor (100_OHM position).
Canoga Perkins 4.4 RS-530 Interface Model 430 NOTE: The -430 interface supersedes the previous -R30 interface for 2240 applications. The -430 interface is a superset of the -R30. If exact compatibility with the older -R30 is desired, the DCD jumper can be moved from the factory strapped CTRL setting (end-to-end RTS-DCD control lead pair always enabled) to CD (DCD function selected by main board CD / DCD and CD / SYNC switches). This interface conforms to EIA RS-530.
2240 Fiber Optic Modem Table 4-C.
Canoga Perkins 4.4.1 RTS_BIAS Jumper The RTS_BIAS jumper controls the state that RTS floats to when there is no signal driving the RTS pin. The OFF position forces this signal to the OFF (negated) state when the interface cable is disconnected. The ON position forces it to ON (asserted). Factory Setting = OFF 4.4.2 DCD Jumper The DCD jumper determines the source of the DCD output. In the CTRL position, the DCD output functions as the output for the RTS input at the far end.
2240 Fiber Optic Modem 4.4.5 SCT Switch This slide switch selects whether the SCT leads are outputs (OUT position) or inputs (IN position). The OUT position makes the 2240 "pure-DCE" and RD data is shifted out in sync with the 2240-supplied SCR clock. The IN position makes the SCT leads inputs and the 2240 will shift RD out in sync with the customersupplied clock on the SCT leads if the main board XTCLK (W26) jumper is ON. Refer to Section 2.2.6 on the use of the XTCLK jumper. Factory Setting = OUT 4.4.
Canoga Perkins 4.4.8 CTS (A) Jumper This jumper selects the electrical characteristic of the CTS (A) lead. In the NORM position, the CTS (A) is a normal RS-422 balanced driver, as per RS-530. The KG position is intended for interfacing to cryptography equipment. If you are not interested in KG applications, leave this jumper in the factory NORM position and skip the following KG jumper settings for the -430 interface.
2240 Fiber Optic Modem 4.5 CCITT V.35 (ISO 2593-1993) Model 436 This interface complies with CCITT Standard V.35 and ISO 2593-1993. Electrical characteristics comply with V.35 for clock and data signals and RS-232 levels for control signals. This interface uses the physical connector type and pinouts specified in ISO 2593-1993 (refer to Table 4-E). The V.35 interface uses a 34 pin female Winchester connector for the physical connection.
Canoga Perkins Function Pin (A/B) CCITT Direction Circuit Number Shield Signal Ground Request to Send (aka RTS) Clear to Send (aka CTS) Data Set Ready (aka DSR) Data Channel Receive Line Signal Detector (aka DCD) Data Terminal Ready (aka DTR) Calling Indicator (aka RI) Local Loopback Remote Loopback Received Data (aka RXD) Receiver Signal Element Timing, DCE Source (aka SCR) Transmitted Data (aka TXD) Transmitter Signal Element Timing, DCE Source (aka SCT) Transmitter Signal Element Timing, DTE Source (
2240 Fiber Optic Modem NOTE: The previous V.35 interface, Model -435, did not conform to the ISO 2593 pinout and was the predecessor to the -436 interface. The signals listed in Table 4-F have different pinouts on the -435 versus the -436. The -435 also did not support the Extra Clock for the receive data signal. This pinout difference table is only included as a reference. Table 4-F. Pinout Differences (-435 vs.
Canoga Perkins Local Loopback (LL) and Remote Loopback (RL) are loopback control leads and perform the same functions as the 2240 front panel LOOP switch, LOC and REM positions. LL and RL are interface signal inputs which can be used to activate the LOC or REM loop functions. These signals can control the loopback functions only if the front panel switch is in the center or OFF position. 4.5.
2240 Fiber Optic Modem 4.5.4 DSR Jumper The DSR jumper controls the behavior of the DSR signal. The CCITT turns DSR OFF when the far-end 2240 modem has a local loopback active. The TEST position causes DSR to turn OFF (negate) whenever any loopback is active at one or both modems. Factory Setting = CCITT 4.5.5 CH_GND Jumper The jumper selects whether chassis ground is connected directly to signal ground (SHORT position) or through a 100 Ohm resistor (100_OHM position).
Canoga Perkins 4.6 Multi-Channel Interfaces 4.6.1 RS-449 / RS-423 Model MC1 This interface includes two physical connectors. The RS-449 / 422 uses a 37-pin, female D-Type connector and the RS-423 uses a 25-pin, female D-Type connector. A typical application for this interface is to transport data and dialer information from a video location to the network equipment over fiber optic cable. The RS-449 interface can carry the Video Codec data with the control lead used for call set up.
2240 Fiber Optic Modem 4.6.1.1 RS-449 / DC-37 Interface This interface complies with EIA Standard RS-449. Electrical characteristics comply with RS-422 for clock and data signals and RS-423 for control signals. The interface uses the physical connector type and pinouts specified in RS-449 (refer to Table 4-H). The RS-449 / 422 interface uses a 37-pin, female D-Type connector for the physical connection. Table 4-H.
Canoga Perkins The SD, RD, ST, RT and TT pins carry the primary data and clock signals (conforming to the RS-449 and RS-422 standards). In addition, an extra clock signal input (conforming to RS-422) is provided to make the 2240 / -422 combination more "DTE-like" in tail circuit applications at the clock source end (refer to Section 2.2.6). The remainder of the pins are either ground references or control signals.
2240 Fiber Optic Modem 4.6.1.1.1 RS_BIAS Jumper The RS_BIAS jumper controls the state that RS floats to when there is no signal driving the RS pin. The OFF position forces this signal to the OFF (negated) state when the interface cable is disconnected. The ON position forces it to ON (asserted). Factory Setting = OFF 4.6.1.1.2 RR Jumper The RR jumper determines the source of the RR output. In the CTRL position, the RR output functions as the output for the RS input at the far end.
Canoga Perkins 4.6.1.1.4 CH_GND Jumper The jumper selects whether chassis ground is connected directly to signal ground (SHORT position) or through a 100 Ohm resistor (100_OHM position). NOTE: In the standalone model, the 100_OHM position will only put a 100 Ohm resistor between the two grounds if the 2240's main board SIGNAL GND jumper is set to the FLOAT position.
2240 Fiber Optic Modem There are six end-to-end control lead pairs. They are listed with the input signal listed first. TD to RD STD to SRD DTR to RI SRTS to SDCD DSRS to SCTS RTS to DCD Note: If DTR to RI and STD to SRD are used on the RS232/RS366 port, these control leads may not be available on 422/449 and V.35 interfaces. Pin Number Table 4-I.
Canoga Perkins 4.6.2 V.35 / RS-423 Model MC2 This interface includes two physical connectors. The CCITT V.35 uses a 34-pin, female Winchester connector and the RS-423 uses a 25-pin, female D-Type connector. A typical application for this interface is to transport data and dialer information from a video location to the network equipment over fiber optic cable. The V.35 interface can carry the video Codec data with the control lead used for call set up.
2240 Fiber Optic Modem 4.6.2.1 CCITT V.35 / MRC 34 Interface This interface complies with CCITT Standard V.35 and ISO 2593-1993. Electrical characteristics comply with V.35 for clock and data signals and RS-232 levels for control signals. This interface uses the physical connector type and pinouts specified in ISO 25931993 (refer to Table 4-K). The V.35 interface uses a 34-pin female Winchester connector for the physical connection.
Canoga Perkins Function Pin (A/B) CCITT Direction Circuit Number Shield Signal Ground Request to Send (aka RTS) Clear to Send (aka CTS) Data Set Ready Data Channel Receive Line Signal Detector (aka DCD) Data Terminal Ready (aka DTR) Calling Indicator (aka RI) Local Loopback Remote Loopback Received Data (aka RXD) Receiver Signal Element Timing, DCE Source (aka SCR) Transmitted Data (aka TXD) Transmitter Signal Element Timing, DCE Source (aka SCT) Transmitter Signal Element Timing, DTE Source (aka SCTE)
2240 Fiber Optic Modem The previous V.35 interface Model MC2 / 435, did not conform to the ISO 2593 pinout and was the predecessor to the MC2 / 436 interface. The MC2 / 436 went into production during mid-summer 1996. The signals listed in Table 4-L have different pinouts on the MC2 / 435 versus the MC2 / 436. The MC2 / 435 also did not support the Extra Clock for the receive data signal. This pinout difference table is only included as a reference.
Canoga Perkins 4.6.2.1.2 DCD Jumper The DCD jumper determines the source of the DCD output. In the CTRL position, the DCD output functions as the output for the RTS input at the far end. In the CD jumper position and with local RTS ON, CTS will turn ON either when the modem’s fiber optic receiver is in sync (main PCBA internal switch S1 CD / DCD = OFF and CD / SYNC = ON) or the state of the RTS signal at the far end (main PCBA internal switch S1 CD / DCD = ON and CD / SYNC = OFF). Refer to Section 2.2.2.
2240 Fiber Optic Modem 4.6.2.2 RS-423 / DB-25 Interface NOTE: The maximum data rate for this interface is 9.6 Kbps. This interface is electrically compatible with EIA RS-423A. It will also operate with asynchronous RS-232D systems. This interface uses the physical connector type and pinouts specified in RS-232D (refer to Table 4-I). The RS-423 / 232D interface uses a 25-pin, female D-type connector for the physical connection. These signal channels operate independently from the main data channel of the V.
Canoga Perkins There are three different types of interface connectors, and each is identified by the number at the end of the interface code of the order number (refer to Table 4-N). The connectors are female DA-15 (4B1); four-position terminal block (4B2); or two female BNCs (4B3). Figure 4-2 shows how the input and output pairs are wired to these connectors. Table 4-M.
2240 Fiber Optic Modem Table 4-N. Transparent Bipolar Line Interfaces Model # Interface Connector Type 4B1 4B2 4B3 DA-15 Terminal Block BNC (75 ohm) Speed 1.544 Mhz T1 or 2.048 Mhz E1 1.544 Mhz T1 or 2.048 Mhz E1 1.544 Mhz T1 or 2.048 Mhz E1 These interfaces are fully transparent to line codes such as B8ZS or HDB3. Three DIP switches (3, 4 and 5) are provided for selecting various line build out settings as indicated in Table 4-M. Standard factory settings are T1 at 0-133 feet for all three models.
Canoga Perkins Figure 4-2. Transparent Bipolar Interface Connectors 2240 (mode 7) Tx T1 4B1 Rx 2240 (mode 5 Slave) Data Clk Tx V.35 Data Clk Rx 74 436 Figure 4-3.
2240 Fiber Optic Modem 4.8 TTL / BNC Interface Model -BN This model uses BNC (bayonet) connectors for the physical interface. The electrical signal characteristics are unbalanced TTL levels, with only the clock and data circuits supported. Four BNC connectors are supplied for connection to a DTE device. High speeds and long distances (clock and data only) can be achieved using this interface.
Canoga Perkins Signal TxD RxD SCR SCT SCTE Full Name Transmit Data Receive Data Serial Clock Receive Serial Clock Transmit External Clock Transmit Direction To Modem From Modem From Modem From Modem To Modem 4.9 Programmable Buffered Interface / Model P53 The Model P53 Interface Module complies with EIA Standard RS-530 while all clock, data and control signals follow the RS-422 standard.
2240 Fiber Optic Modem A wire wrap header (J3) provides the means to interconnect these resources together with the standard modem transmit and receive circuits to perform the intended function. Figure 4-5 illustrates how the resources are tied into the J3 header. Specific applications are satisfied by wire wrap connections between appropriate pins. Four pre-wrapped headers are provided with the interface. These implement the most common applications. See Figures 4-7, 4-9,4-11 and 4-13.
Canoga Perkins KG Swing Jumpers FIFO Data Out Data In Shift Out Shift I Modem Alarm W19 8 n W20 RLSD 10 5 3 12 4 3 19 9 16 RxD From Rx Data 6 Fiber 17 13 9 SCR Inverter 1 15 2 14 SCT 20 Wire Wrap Header J3 12 16 FIFO 23 Clock 24 17 SCTE 11 11 Figure 4-5.
2240 Fiber Optic Modem SW1 Position (O)pen (C)losed 1 2 3 4 C O C O C O C O C O C O C O C O Table 4-P. Delay Times for Programmable Buffered Interface C C O O C C O O C C O O C C O O C C C C O O O O C C C C O O O O C* C C C C C C C O O O O O O O O Delay Time P53 * 20 ns 30 ns 40 ns 50 ns 60 ns 70 ns 80 ns 90 ns 100 ns 110 ns 120 ns 130 ns 140 ns 150 ns 160 ns 170 ns * * Default setting as shipped Sw1 Dl1 DSR W15 W16 Test GND RSTBIAS Figure 4-6.
Canoga Perkins Jumper Description W1 / W2 W5, W6, W7 W8 / W9 W10 / W11 W12 / W13 / W14 W15 / W16 W17 / W18 W19 / W20 Chassis Ground RCVR Terminations Legacy Config. RLSD Output Swing RLSD Output Swing DSR RTS Bias RLSD Notes Factory Setting W1 - 100 ohms / W2 - Short W1 Default All Out Both Out W11 W13 W16 Default W18 Default W20 Default W15 - Test / W16 - GND W17 - On / W18 - Off W19 - Single Ended / W20 - Differential Table 4-Q. Jumper Settings and Descriptions 4.9.
2240 Fiber Optic Modem 4.9.2 Generic Interface Figure 4-7 illustrates basic DCE configurations, which bypass all the "feature" circuits provided by the P53 Interface. PROGRAMMABLE BUIFFERED INTERFACE MODEL P53, GENERIC DCE RS-530 P/N 6100030-006 KG Swing Jumpers FIFO Data Out Data In Shift Out Shift I Modem Alarm W19 8 n W20 RLSD 10 5 3 12 4 3 19 9 16 RxD From Rx Data 6 Fiber 17 Figure 4-7.
Canoga Perkins 4.9.3 External Station The External Station is used when an external station clock is providing timing (see Figures 4-8 and 4-9). When connecting KG or KIV encryptors together on the Black side, using an external timing device you should install the external station clock strapped header in the J3 position. In this application, the modems are acting as the network, although the timing input is from an outside source.
2240 Fiber Optic Modem 4.9.4 Internal The internal function is used when network equipment is set for Eternal Timing (see Figures 4-10 and 4-11). When connecting KG or KIV encryptors together on the Black side, you should install the internal strapped header in the J3 position. In this application, the modems are acting as the network timing source. In most cases, both modems should be set for internal master clock. The rate switches should be set to the appropriate speed for the circuit.
Canoga Perkins 4.9.5 External The External function is used when network equipment is set for Network or Internal Timing (see Figures 4-12 and 4-13). When connecting KG or KIV encryptors on the Red side to a DTE device, you should install the external strapped header in the J3 position. In this application, the modems are acting as an extension of the Red side cable in a true tail circuit. The modem at the Red end is set for external clock and the modem at the DTE end is set for slave clock.
2240 Fiber Optic Modem 4.9.6 DTE Adapter This adapter is supplied with the P53 interface and should be used when connecting to a DCE device. This allows the use of a straight-through RS-530 cable. Figure 4-14 illustrates the DCE to DTE pin assignments. The gender of this adapter on the user side is male. PROGRAMMABLE BUFFERED INTERFACE MODEL P53, DCE RS-530 [DTE] DTE ADAPTER 4 8 MODEM RLSD 19 2 3 RxD 14 16 24 17 SCR 11 9 15 NC SCT 12 NC 15 Figure 4-14.
Canoga Perkins 4.9.7 Legacy Adapter This adapter is provided with the P53 interface and should be used if preexisting cabling was installed for use with Model P2 interface cards (see Figure 4-15). This adapter converts the standard RS-530 pin assignment on the P53 back to the original P2 pin assignments.
2240 Fiber Optic Modem 4.10 High-Speed RS-422 / Mil-Std 188114C Interfaces There are three High-Speed RS-422 interface models (TW, T22 and D22) and three High-Speed Mil-Std 188-114C interface models (TW8, T88 and D88) available. All can operate up to 20 Mbps (2240 limited to 2.048 Mbps). All support only clock and data signals as shown in Table 4-R. Both the RS-422A and Mil-Std 188114C are balanced differential electrical signals. Signal Table 4-S.
Canoga Perkins Model Electrical Interface Type Physical Interface Type Physical Interface Figure / Table Driver Impedance Termination Impedance TW RS-422A 4 TwinAx Figure 4-16 <100 Ohms 100 Ohms ±10% TW8 Mil-Std 118-114C 4 TwinAx Figure 4-16 <100 Ohms 78 Ohms ±10% T22 RS-422A 5 TwinAx Figure 4-17 <100 Ohms 100 Ohms ±10% T88 Mil-Std 188-114C 5 TwinAx Figure 4-17 <100 Ohms 78 Ohms ±10% D22 RS-422A DC-37 Table 4-V <100 Ohms 100 Ohms ±10% D88 Mil-Std 188-114C DC-37 Table
2240 Fiber Optic Modem Table 4-U.
Canoga Perkins 4.10.2 Model TW8 The signaling used on this interface is Mil-Std 188-114C. Four TwinAx connectors (BJ-77, 3-lug) are used for the physical connection (see Figure 4-16). A switch is provided to select whether the fourth TwinAx (SCT / SCTE) is to be used as an output (SCT) or as an input (SCTE). By setting the switch to the SCT position, the port becomes an output providing the clock to the connected device.
2240 Fiber Optic Modem 4.10.3 Model T22 The signaling used on this interface is RS-422A. Five TwinAx connectors (BJ-77, 3-lug) are used for the physical connection (see Figure 4-17). 4.10.4 Model T88 The signaling used on this interface is Mil-Std 188-114C. Five TwinAx connectors (BJ-77, 3-lug) are used for the physical connection (see Figure 4-17). 4.10.5 Model D22 The signaling used on this interface is RS-422A.
Canoga Perkins * Table 4-V.
2240 Fiber Optic Modem 4.11 Interface Reconfiguration Figure 4-18 illustrates how the interface circuit board fits into the larger main modem board opening. A header-type connector is provided to connect the two circuit boards together. The interface board may be removed by loosening the two retaining screws and nuts, then pulling the board outward from its connector.
Canoga Perkins 4.12 Standalone Reconfiguration To access the circuit board on a standalone unit, the enclosure cover must first be removed by loosening the six screws on the sides of the unit. Next, unplug the power supply connector from the PC board, and remove the two screws holding the rear panel in place. The entire circuit board may now be removed by loosening the eight mounting screws. The interface board may now be changed as outlined in Section 4.11, "Interface Reconfiguration.
2240 Fiber Optic Modem 5. Troubleshooting 5.1 Diagnostic Procedures The following procedures are intended for use in the event of a system failure, not during the initial installation of a 2240 optical link. For initial installation checkout, refer to Section 1.7 of this manual. Also, refer to Section 6 for detailed diagnostics. 5.2 Local and Remote Loopback 5.2.1 Loopback Tests All 2240s have built-in Local and Remote Loopback. These tests can be used to verify the basic operation of a 2240 system.
Canoga Perkins NOTE: Interface control of the loopback tests is only supported on the following modular interfaces: RS-423 / RS-232C, RS-449, RS-530 and V.35. When activated, the Local Loopback test will cause all data transmission from the near end (local) user device to be looped back toward the receive of that same device. The data from the remote user device will not loop back (it will continue receiving data from the local device), but the Loop On indicator at the far end turns on.
2240 Fiber Optic Modem 6. Diagnostic Procedures 6.1 2240 / 2201 Diagnostic Procedures The following diagnostic procedures should be followed to test the 2240 system, troubleshoot a defective link or detect a defective fiber optic cable, connector, modem or power supply. NOTE: Refer to the 2201 Rack Chassis User Manual for diagnostic procedures for the 2201 Rack Chassis and power supplies. 6.1.
Canoga Perkins 6.2 Loopback Test Diagnostic Procedure Step Symptom Possible Cause(s) 1 No Sync Indication. 2 Verify the optical cable loss. Remove the Tx fiber from the modem. Use the optical power meter and fiber optic jumper cable to determine the optical launch power for this modem. Reconnect the Tx fiber to the modem. Remove the Rx fiber from the modem and determine the optical receive power into this modem. Reconnect the Rx fiber to the modem.
2240 Fiber Optic Modem Step Symptom Possible Cause(s) Action 3 Cable loss exceeds modem loss budget. Defective F/O cable Repair or replace defective cable 4 Cable loss exceeds modem loss budget. Defective Fiber Optic Connectors Repolish or replace defective connector 5 Set the Remote Loopback switch on the near-end modem. Set up BERT tester for the proper clocking, data rate and format as used with the circuit. Use the existing interface cables if possible.
Canoga Perkins 6.3 Fiber Optic Diagnostic Procedure If the Loopback Test is successful, and the modems still do not function, check the fiber optic parameters as outlined below. There also may be a data rate incompatibility. If this check out of the electrical and optical links provides no indication as to the problem, contact Canoga Perkins Installation and Repair Department for assistance. NOTE: Each range limit has a +1dB margin at the transition point.
2240 Fiber Optic Modem 7. Specifications 7.1 Optical Interface Composite Error Rate: 1 in 1010 or better Fiber Optic Cable Compatibility: 50 and 62.
Canoga Perkins TYPICAL LAUNCH POWER AND Rx SENSITIVITY LAUNCH POWER (dBm) OPTIC TYPE HI LO Rx SENS. (dBm) 850 LED -15±2 -20±4 -32 1310 LP LASER -15±2 -15±2 -32 1310 / 1550 HP LASER -5±1 -14±2 -32 7.2 System Electrical Interface Connector: 102 Interface Connector Type RS-232C / 423 / 530 Programmable RS-530 (P53) RS-422 (422) CCITT V.35 (V.
2240 Fiber Optic Modem Power Requirement: Standalone 115 VAC +10% @ 0.22 Amps 115/230 VAC + 10% switchable @ 0.11 Amps ,47 to 63 Hz -48VDC; 0.5 Amps (max) Rack Mount PC Card 18 VAC +10% @ 1.1 Amps per board 50 to 64 Hz 7.3 Indicators and Controls Indicators (6): Tx/Rx Data Activity; Local / Remote Sync; Loopback Active; Power On; Power Alarms (2201 Rack Only) Controls (10): Local / Remote Loopback Slide Switch; Operating Mode DIP Switch; Data Rate DIP Switch; Hi / Low Optic Power DIP Switch 7.
Canoga Perkins 7.5 2240 Fiber Optic Modem Configurations 2240-S-XXX-XX-XX-X 2240-R-XXX-XX-XX-0 S = STANDALONE R = RACKMOUNT POWER OPTIONS 0N/A 1115V-AC WALL PLUG 2115/230V IN-LINE 348VDC (Call Canoga Perkins for additional DC options) CRYSTAL OPTIONS 00 NO CRYSTAL The 2240 Fiber Optic Modem provides most standard clock rates with built in oscillators. If a non-standard internal clock rate is required, refer to Section 3.3, or call Canoga Perkins and ask for Applications Support.
2240 Fiber Optic Modem Appendix A Warranty Current Warranty information is available on-line in the Client Login Area of the Canoga Perkins web site (www.canoga.com) or by contacting Technical Support at 800-360-6642 (voice) or fiber@canoga.com (email). Optional Service Programs Canoga Perkins offers several optional Service Programs. Please call Canoga Perkins Sales Department (818-718-6300) or see our web site (www.canoga.com) for details.
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