CLEAR-COM ENCORE EF-701M INTERFACE INSTRUCTION MANUAL
EF-701M Interface Instruction Manual © 2007 Vitec Group Communications. All rights reserved. Part Number 810363Z Rev. 1 Vitec Group Communications, LLC. 850 Marina Village Parkway Alameda, CA 94501 U.S.A Vitec Group Communications 7400 Beach Drive Cambridge Research Park Cambridgeshire United Kingdom CB25 9TP Vitec Group Communications Room 1806, Hua Bin Building No. 8 Yong An Dong Li Jian Guo Men Wai Ave Chao Yang District Beijing, P.R.
CONTENTS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Connecting a Party-Line Channel to a Matrix Frame Port . . . . . . . . . . . . 1-2 Converting a Party-Line Channel to 4-Wire Audio. . . . . . . . . . . . . . . . . .
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Connecting the EF-701M Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Connecting the EF-701M to a Matrix Port. . . . . . . . . . . . . . . . . . . . . . . . 2-1 Connecting the EF-701M to a Modem . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Connecting the EF-701M to RTS-TW Equipment . . . . . . . . . . . . . . . . . 2-5 Other Connections . . . . . . . . . . . . . . . . . . . . .
Data Troubleshooting Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 Nulling Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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IMPORTANT SAFETY INSTRUCTIONS Please read and follow these instructions before operating this product. EF-701M INTERFACE 1. 2. 3. 4. 5. 6. 7. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8.
11. Unplug this apparatus during lightning storms or when unused for long periods of time. 12. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. 13.
CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol alerts you to the presence of uninsulated dangerous voltage within the product's enclosure that might be of sufficient magnitude to constitute a risk of electric shock. Do not open the product's case. This symbol informs you that important operating and maintenance instructions are included in the literature accompanying this product.
EMC AND SAFETY The EF-701M Interface meets all relevant CE and FCC specifications set out below: EN55103-1 Electromagnetic compatibility. Product family standard for audio, video, audio-visual, and entertainment lighting control apparatus for professional use. Part 1: Emissions. EN55103-2 Electromagnetic compatibility. Product family standard for audio, video, audio-visual, and entertainment lighting control apparatus for professional use. Part 2: Immunity.
1 OPERATION INTRODUCTION Congratulations on choosing this Clear-Com product. Clear-Com was established in 1968 and remains the market leader in providing intercoms for entertainment, broadcast and industrial applications. The ruggedness and high build-quality of Clear-Com products defines the industry standard. In fact, many of our original beltpacks and main stations are still in daily use around the world.
The EF-701M 4-Wire and Matrix Direct Interface is a flexible and powerful tool for connecting 2-wire intercom systems or stations together over various 4-wire transmission media. The EF-701M Interface can also connect a 2-wire intercom system directly to a Clear-Com Matrix frame port.
Matrix EF-701M Party-Line Intercom 3 3 3 RJ-45 RJ-45 3 3 = Male 3-Pin XLR 3 = Female 3-Pin XLR Figure 1-1: Connecting a party-line channel to a Matrix intercom CONVERTING A PARTY-LINE CHANNEL TO 4-WIRE AUDIO The EF-701M Interface converts a channel of standard or TW party line to 4-wire audio and, at the same time, converts a DC-voltage call signal or 20-kHz call signal to RS-422 data.
converted to go over the chosen transmission medium, it must be reconverted to 2-wire mode to properly connect to the party-line system or station at the other end of the line. The EF-701M obtains its DC operating current from the local party-line connection on pin 2 of the XLR connector. This current is not conducted between EF-701M units, so each EF-701M must be powered by an intercom line as shown in Figure 1-2.
in Figure 1-3. At the other end of the fiber there is another EF-701M unit and PL system with walkie-talkies interfaced through a TW-47 Interface. The EF-701M allows the people on the first PL system to communicate with the people on the walkie-talkies over a kilometer of fiber, with the call signal determining transmit or receive operation.
horizontally in one-rack unit (1RU) of space and will offer sufficient vertical clearance to accommodate a variety of mounting methods. While the EF-701M may be used as a single-ended 4-wire-to-party-line interface with excellent results, it is uniquely equipped to work in point-to-point pairs. Much of the discussion in this manual addresses the issues of operation in this latter mode.
system that the EF-701M connects to via the DB-15) must accept line-level (-15 dBu to +4 dBu) 4-wire audio and, if call signal is desired, RS-422 data.
FRONT PANEL CONTROLS 4-Wire Interface Local PL Send Recv On Data R L C Null Test EF-701M Figure 1-5: Front panel of an EF-701M unit Local Send controls the audio signal level from the local 2-wire intercom (the system connected to this EF-701M) to the audio out of the 4-wire I/O. Local Receive controls the audio signal level from the audio in of the 4-wire I/O to the local 2-wire intercom.
Sidetone Null Adjustment This set of three trimpots includes R=Resistance, L=Inductance, and C=Capacitance. These compensate for each component of the line impedance, providing the best null possible. To prevent damage to the level control and nulling trimpots, do not force them past their stop points. Power LED This green LED will illuminate when the EF-701M is receiving power from pin 2 of the party-line XLR connection. Data LED This amber LED has four modes. The first three relate to call signal data. 1.
REAR PANEL SETTINGS AND CONNECTORS CC/TW Matrix Direct Matrix Call Via RS-422 Data 4-Wire Audio Intercom Figure 1-6: Rear panel of an EF-701M unit Mode-Switch Settings The two switches on the rear panel of the EF-701M work independently of each other. Switch 1 adjusts the EF-701M’s connector settings for use with either 4-wire fiber (the ON position) or a matrix intercom (the OFF position).
MODE SWITCH OFF (DEFAULT) ON MODE-SWITCH 1 RJ-45 connects to 4-Wire/Fiber RJ-45 connects to Matrix directly MODE-SWITCH 2 DB-15 sends/receives C-C DC Call, C-C Intercom Level DB-15 sends/receives 20-kHz Call, RTS-TW Intercom Level Table 1-1: EF-701M’s mode-switch settings 3-Pin XLR Connector (Party Line I/O) The female 3-pin XLR jack on the EF-701M’s back panel connects to the 2-wire party line. If a loop-through connection is needed, use a high quality “Y” cable like the Clear-Com SP-3.
DB-15 Connector When mode-switch 1 is set to 4-wire mode (OFF), the DB-15 connects to additional interfaces or converters (or to another EF-701M). Two pins each are dedicated to audio in, audio out, data in, and data out. Shorting pins 8 and 15 together, or setting mode-switch 2 to ON adjusts the unit to respond to 20-kHz call signal instead of DC voltage and adjusts audio levels for connection to RTS TW lines. There are also connections for audio and data shields if present in the wiring.
2 INSTALLATION CONNECTING THE EF-701M INTERFACE CONNECTING THE EF-701M TO A MATRIX PORT To connect the EF-701M directly to a Clear-Com Matrix frame port: 1. On the EF-701M’s back panel, set mode-switch 1 to the ON position. The Data LED will remain ON, except when the unit is being nulled. 2.Connect a CAT-3, CAT-5, or above cable from the RJ-45 Matrix connector on the back panel of the EF-701M to a port (RJ-45) on the Matrix frame. The EF-701M is powered from the 2-wire intercom line.
Note that when the EF-701M is set to Matrix Direct mode (mode-switch 1 ON), the internal baud rate jumpers have no effect. The transmission rate is automatically set to the 19.2 kilobaud rate required for Matrix communication. If you set mode-switch 2 on the EF-701M’s rear panel to the ON position, the 20-kHz call signal is selected and audio levels are adjusted for connection to RTS-TW lines.
The four pairs of cable used for full operation include one each for audio in and audio out and one each for RS-422 data in and data out. Take care to wire the DB-15 or RJ-45 pins correctly. For added reference Figure 2-1 shows the pinout configuration. A stick-on label with the pinout assignments has been included for the user’s convenience. Attach this in a convenient location. After wiring the DB-15 to the appropriate connectors, follow these steps to connect the EF-701M to a modem: 1.
Matrix RJ-45 Intercom Line 4-Wire Audio / Data 1 2 3 4 5 6 78 XLR-F 8 7 15 2 - Matrix RS-422 from EF-701M + Matrix Audio from Party Line + Matrix Audio to Party Line - Matrix Audio to Party Line - Matrix Audio from Party Line + Matrix RS-422 to EF-701M - Matrix RS-422 to EF-701M + 30 VDC Power Intercom Line Intercom Ground 14 5 13 4 12 3 11 2 10 1 9 1 3 + Matrix RS-422 from EF-701M 6 Jump for TW Open for C-C (Not Used) - RS-422 Local Receive - RS-422 Local Transmit + RS-422 Local Receive +
CONNECTING THE EF-701M TO RTS-TW EQUIPMENT To use the EF-701M with RTS-TW equipment you can either set the mode switch to the “RTS” setting as discussed in the previous chapter, or you can wire the DB-15 connector specifically for that purpose. When used with all but the very early RTS-TW equipment, whichever audio channel is wired to pin 3 of the EF-701M’s XLR connector will connect through the DB-15.
LEVELS EF-701M front-panel controls affect the following “listen levels”: the sidetone and volume at the users’ stations or beltpacks; the receive level of the local EF-701M; and the send level of the remote EF-701M. Adjust the PL send and receive levels as appropriate for the external PL system and listening conditions. The controls will typically be between 10 o’clock and 2 o’clock, roughly in the 0 dBu range at the 4-wire interface.
NULLING “Sidetone” is the sound of the operator’s own voice in his or her headset or speaker. With interfaces, it is necessary to “null” (minimize) the sidetone when external party lines are connected over the secondary transmission media. Ideally, there should be no portion of the talk signal in the listen signal. Every EF-701M sharing a channel in a system should be nulled consecutively. Null is also referred to as “hybrid null.
Adjusting the Null Normally, the following adjustment is made once during installation. (If the configuration of the local party-line system changes substantially, it may be necessary to re-null the system for optimum performance.) 1. Connect all the local party-line devices for that channel together and to the EF-701M. 2.Plug into the front-panel earphone jack labeled “test.” You will now hear a steady 200-Hz tone through the earphone. 3.Adjust the “R” control until the tone is at its minimum. 4.
Troubleshooting Tips for Nulling • If the “R” control is turned fully counterclockwise, the line has multiple terminations or a resistive load. • If the “R” control is fully clockwise, then the line is unterminated. • The “L” control compensates for the low frequency inductive and capacitive elements of the external party line. If the “L” control is fully turned in either direction, it is likely that there is a problem in the external party line.
INTERNAL ADJUSTMENTS The only user-adjustable internal setting is selection of the baud rate for the RS-422 data. The factory-set baud rate for the RS-422 data is 19.2 kilobits per second (19.2 kbps). For certain transmission schemes, the baud rate is internally selectable for 2400, 4800, or 9600 bits per second. Additional fixed settings are: 8 data bits; 1 stop bit; no parity. Note: Accessing the baud rate jumpers inside the EF-701M requires removal of the cover.
6.Lift off the cover. 7.Make the necessary adjustments of jumpers P3 and P4 (shown in the following table). To set a jumper to the closed position, plug it onto both pins. To set a jumper to the open position, plug it onto only one of the pins. BAUD 1 BAUD 2 RATE Open Open 19.2 kBaud Closed Open 9.6 kBaud Open Closed 4.8 kBaud Closed Closed 2.4 kBaud Table 2-1: P3 and P4 jumper settings 8.For reassembly, reverse steps 1 through 6.
TRANSMISSION METHODS DIRECT CONNECTION There are many instances where twisted-pair cable is available for audio connections. This wiring is typically found in unused telephone cable in or between buildings. Figure 2-2 illustrates twisted-pair wiring connections.
Simply connect the 4-wire audio and 4-wire data between EF-701M units utilizing this cable. This will form a direct connection between the DB-15 connectors on a pair of EF-701M units. The PL systems at each end of the cable will require their own power and termination for their local channel. Up to 5000 ft. (1.52 km) of CAT 3 or better cable, and possibly more, may be used to connect between EF-701M units in this manner.
There are two basic modes of fiber-optic transmission. In a multimode fiber, the light travels through the fiber via multiple paths. In a single-mode fiber, the light travels in a single path. Depending on the equipment, single or multiple channels of audio, video, data, or a mix thereof can be multiplexed and carried in either one or both directions. Figure 2-3 illustrates wiring connections to a popular type of multimode fiber-optic modem over shielded-pair cable.
Just as with analog cable, the longer the fiber-optic cable, the more signal degradation occurs. Cable splices and connectors also contribute to overall path loss. Performance is dependent on the modem, the cable, and the selected wavelength. Single-mode fibers can carry signals over much longer lengths, though the equipment is more costly, in part due to the use of lasers rather than LEDs as the light source.
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3 MAINTENANCE TROUBLESHOOTING TIPS Listed below are symptoms, causes, and solutions for some of the more common problems that may occur.
Audio Troubleshooting Tips Symptom Cause Squealing feedback, levels too high, distortion, call signal stays on. The local PL channel is not terminated. Check termination switches on PL equipment and set appropriately. (One termination per channel). Levels seem low even after adjustment. The local PL channel has multiple terminations. Check termination switches on PL equipment and set appropriately. Echoes, hollow sound, resonance.
Symptom Levels don’t match from one end to the other. Cause Solution 1. Additional level adjustments may be available on the modems. 1. Always begin a setup with these set to their nominal levels. 2. Clear-Com/RTS jumper is set incorrectly. 2. Reset jumper. Excessive noise or poor frequency response. Various causes related to modems and the network rather than to the party-line equipment. Know the performance parameters of the transmission system. Level adjustment controls seem to work backwards.
Data Troubleshooting Tips Symptom Data LED is off even though units are connected at each end. Data LED blinks rapidly. 3-4 Cause Solution 1. Problem in the wiring from the DB-15 to the modem or problem with the transmission medium. 2. Baud rate or other modem requirements not compatible with EF-701M. 3. The EF-701M units are set to different baud rates. 4. One EF-701M is set to Matrix Direct Mode when connected to another EF-701M. 1. Adjust wiring.
Symptom Call signal is locked on at one end. EF-701M INTERFACE Cause Solution 1. Local PL problem. 1. Check PL. 2. DB-15 is wired incorrectly at other end. This will happen if an RTS-TW channel is connected at one EF-701M and a Clear-Com is connected at the other, but the DB-15 on the RTS end has not been wired properly. 2. Check wiring.
Nulling Troubleshooting Tips Symptom No audio; green LED is off. 3-6 Cause EF-701M is not receiving power. Solution EF-701M units at both ends of the connection must receive power from a local PL system.
Symptom Unsatisfactory null. Cause 1. Unstable PL system due to excessive cabling, a high number of stations, transformers connected across the intercom channel, or other PL equipment issues such as termination. 2. Too many EF-701M units on channel. EF-701M INTERFACE Solution 1. Verify operational status of PL equipment. 2. Remove EF-701M units from the network. If nulls on the remaining units improve, the problem was too many EF-701M units.
Block Diagram TW Power Splitter Figure 3-1: EF-701M Block Diagram Power Intercom Line Power Hybrid Null Receive Send 4-Wire Output 4-Wire Input Gain Adj. Gain Adj. 20 kHz Call 200 Hz Null C-C Call Send & Receive Nulling Earphone 20 kHz Call Receive Phone Det.
4 GLOSSARY The glossary gives definitions of technical terms found throughout this manual. Category 3, 5, 5e, or 6 cable: EIA/TIA 568 category specification relating to the performance of network cabling. All are adequate for EF-701M wiring. CODEC: A device that enCODes and DECodes data. Drop(s): A point or points in the party-line system where a beltpack or station is present.
The EF-701M Interface connects 2-wire intercom systems or stations together over various 4-wire transmission media. In doing so, it converts a channel of standard 2-wire or TW party line to 4-wire audio and, at the same time, converts a DC-voltage call signal or 20-kHz call signal to RS-422 data. Local PL: The party-line system that connects to an EF-701M through standard microphone cable and powers the EF-701M Interface.
Null: (noun) 1. Adjustment on the intercom that controls the amount of sidetone heard by the operator. 2. The degree of sidetone adjustment. (verb) To adjust the amount of sidetone heard by the intercom operator. Party Line: Intercom channel on which each member can both listen and speak to every other member on the channel. Analogous to a telephone conference call with its full duplex (talk and listen) communication. PL: Abbreviation for Party Line. RS-422: A balanced asynchronous data connection.
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5 SPECIFICATIONS EF-701M TECHNICAL SPECIFICATIONS CLEAR-COM FORMAT Max Level Before Clipping Impedance: SIGNALLING Receive: Send: EF-701M INTERFACE LINE CHARACTERISTICS Max Level Before Clipping Impedance: SIGNALLING TONE dBu is an absolute measurement. 0 dBu is referenced to 0.
Distortion Party Line - Matrix Matrix - Party Line Noise Party Line - Matrix Matrix - Party Line <=0.5% <=0.
Front Panel Connectors and Controls TS1 Earphone Jack Socket Level Adjust Control Null Adjust Control Power Indicator LED Data Indicator LED Dimensions Height: (41 mm) (1 RU, EIA rack) Width: (151 mm) Depth: (122 mm) Weight: (.794 kgs) EF-701M INTERFACE (1) 3.5mm Accessories Wiring diagram, adhesive backed (2) Rotary TS-1 testing earphone (3) Rotary (1) Green (1) Amber 1.62 in. 5.94 in.
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LIMITED WARRANTY Return Material Authorization (RMA) numbers are required for all returns. Both warranty and non-warranty repairs are available. Vitec Group Communications (VGC) warrants that at the time of purchase, the equipment supplied complies with any specification in the order confirmation when used under normal conditions, and is free from defects in workmanship and materials during the warranty period.
• Cables, accessories, components, and consumable items have a limited warranty of 90 days. • Headsets, handsets, microphones, and spare parts have a limited warranty of one year. • UHF wireless IFB products have a limited warranty of one year. • UHF wireless intercom systems have a limited warranty of three years. • All other Clear-Com and Drake brand systems and products, including beltpacks, have a limited warranty of two years. The warranty starts at the time of the product’s original purchase.
Instructions for reaching VGC’s User Support Centers are given below. Telephone for Europe, Middle East and Africa: +49 40 6688 4040 or +44 1223 815000 Telephone for the Americas and Asia: +1 510 337 6600 Email: vitec.support@AVC.de Once the standard warranty period has expired, the User Support Center will continue to provide telephone support if you have purchased an Extended Warranty. For latest contact information please refer to the Service and Support section at www.clearcom.com.
North America, Canada, Mexico, Caribbean & US Military Tel: +1 510 337 6600 Email: customerservicesUS@vitecgroup.com Asia Pacific & South America Tel: +1 510 337 6600 Email: customerservicesAPAC@vitecgroup.com VGC has the right to inspect the equipment and/or installation or relevant packaging. For latest contact information please refer to the Service and Support section at www.clearcom.com.
EXTENDED WARRANTY You can purchase an extended warranty at the time of purchase or at any time during the first two years of ownership of the product. The purchase of an extended warranty extends to five years the warranty of any product offered with a standard two-year warranty. The total warranty period will not extend beyond five years. Note: VGC does not offer warranty extensions on UHF wireless intercom systems, or on any product with a 1-year or 90-day warranty.
OF USE, REVENUE, AND/OR PROFITS). SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES OR THE LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. IN ANY EVENT, TO THE MAXIMUM EXTENT PERMITTED UNDER APPLICABLE LAW, VGC'S LIABILITY TO CUSTOMER HEREUNDER SHALL NOT UNDER ANY CIRCUMSTANCES EXCEED THE COST OF REPAIRING OR REPLACING ANY PART(S) FOUND TO BE DEFECTIVE WITHIN THE WARRANTY PERIOD AS AFORESAID.
This limited warranty is not transferable and cannot be enforced by anyone other than the original consumer purchaser. This warranty gives you specific legal rights and you may have other rights which vary from country to country.
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