Eclipse Series RF Technology rfinfo@rftechnology.com.au November 2001 R220 Receiver Operation and Maintenance Manual This manual is produced by RF Technology Pty Ltd., 10/8 Leighton Place, Hornsby, 2077, Australia, and is Copyright ©2001, RF Technology Part No.
CONTENTS CONTENTS Contents 1 Operating Instructions 1.1 Front Panel Controls and Indicators 1.1.1 Mon. Volume 1.1.2 Mon. Sq. 1.1.3 N. SQ 1.1.4 C. SQ 1.1.5 Line 1.1.6 PWR LED 1.1.7 SQ LED 1.1.8 Alarm LED 5 5 5 5 5 6 6 6 6 7 2 Receiver Internal Jumper Options 2.1 JP1: 240Hz Notch Filter 2.2 JP2: Audio Response 2.3 JP3: Audio Filter In/Out 2.4 JP4: 600Ω Line dc Loop COS 2.5 JP6: COS Polarity 2.6 JP7/8/9: dc Loop COS Configuration 2.7 JP7, JP8, JP9: Direct Output COS 2.
CONTENTS 7 Specifications 7.1 General Description 7.1.1 Channel Capacity 7.1.2 CTCSS 7.1.3 Channel Programming 7.1.4 Channel Selection 7.1.5 Microprocessor 7.2 Physical Configuration 7.3 Front Panel Controls, Indicators and Test Points 7.3.1 Controls 7.3.2 Indicators 7.3.3 Test Points 7.4 Electrical Specifications 7.4.1 Power Requirements 7.4.2 Frequency Range and Channel Spacing 7.4.3 Frequency Synthesizer Step Size 7.4.4 Frequency Stability 7.4.5 Nominal Antenna Impedance 7.4.6 IF Frequencies 7.4.
CONTENTS B CONTENTS Parts List Page 4 RF Technology R220
1 OPERATING INSTRUCTIONS WARNING Changes or modifications not expressly approved by RF Technology could void your authority to operate this equipment. Specifications may vary from those given in this document in accordance with requirements of local authorities. RF Technology equipment is subject to continual improvement and RF Technology reserves the right to change performance and specification without further notice. 1 Operating Instructions 1.1 Front Panel Controls and Indicators 1.1.1 Mon.
1.1 OPERATING INSTRUCTIONS 1.1 Front Panel Controls and Indicators 2. Turn the N. SQ. adjustment counter clockwise until the squelch opens and noise is heard from the speaker. Adjust the VOLUME to a comfortable listening level. 3. In the absence of any on channel signal, turn the N.SQ. screw clockwise until the noise in the speaker is muted. Then turn the screw two additional turns in the clockwise direction. 1.1.4 C.SQ The C.SQ trimpot is used to set the carrier squelch sensitivity.
2 RECEIVER INTERNAL JUMPER OPTIONS The LED and squelch function are controlled by noise, carrier and tone squelch circuits. 1.1.8 ALARM LED The ALARM LED can indicate the detection of several different fault conditions by the self test circuits. The alarm indicator shows the highest priority fault present. Receivers using software issue 5 and higher use the cadence of the LED flash sequence to indicate the alarm condition. Refer to table 1.
2.2 2 RECEIVER INTERNAL JUMPER OPTIONS JP2: Audio Response 2.2 JP2: Audio Response Condition 750 uSec. de-emphasis Flat response 2.3 Position 1-2 * 2-3 JP3: Audio Filter In/Out JP3 bypasses the 300Hz high-pass filter and 240Hz notch filter if necessary. Condition Hi-pass, Notch In Flat response 2.4 Position 2-3 * 1-2 JP4: 600Ω Ω Line dc Loop COS JP4 allows the dc return path through the output audio transformer to be broken, to permit dc signaling via the audio pair or wires.
2 RECEIVER INTERNAL JUMPER OPTIONS 2.7 2.7 JP7/8/9 Direct Output COS JP7, JP8, JP9: Direct Output COS (JP4 2-3) In this arrangement, the COS signal is taken via the separate COS+ and COSoutputs, either with free (floating) output or with +12Vdc pull-up. Condition +12 Vdc Direct Output Free Switch Output 2.
2 RECEIVER INTERNAL JUMPER OPTIONS RX PCB TX PCB The Receiver and Transmitter modules plug into the back plane DB25/F connectors Miniature spade connectors (2.1 x 0.6 x 7mm) are captive/ soldered at the labelled points. To configure: Solder wire connections between appropriate points.
3 RECEIVER I/O CONNECTIONS 3 Receiver I/O Connections 3.1 25 Pin Connector 3.1 25 Pin Connector The D-shell 25 pin connector is the main interface to the receiver. The pin connections are described in table 3.
4 FREQUENCY PROGRAMMING 4 Frequency Programming Channel and tone frequency programming is most easily accomplished with RF Technology TecHelp/Service Monitor 2000 software. This software can be run on an IBM compatible/Windows PC and provides a number of additional useful facilities. TecHelp/Service Monitor 2000 allows setting of the adaptive noise squelch threshold, provides a simple means of calibrating the signal strength output and minimum signal alarm.
5 CIRCUIT DESCRIPTION 5.2 IF Section A two pole 45 MHz crystal filter XF1 is used between the first and second IF amplifiers. The second IF amplifier Q4 provides additional gain of 6-10dB. A two pole crystal filter is used between Q4 and the 2nd oscillator mixer. These two crystal filters provide some adjacent channel rejection and all of the second IF image frequency rejection. U1 is a monolithic oscillator and mixer IC. It converts the 45 MHz IF signal down to 455 KHz.
5.5 Audio Signal Processing 5.5 5 CIRCUIT DESCRIPTION Audio Signal Processing A 4 KHz low pass filter (U27b) is used to remove high frequency noise from the signal. A 300 Hz high pass filter (U26a,b) then removes the sub-audible tones. A 240 Hz notch filter (U26c,d) is used to improve the rejection of tones above 200 Hz. The high pass and notch filters can be bypassed by internal jumpers JP1 and JP3. The audio frequency response can be set for either 750 uS de-emphasis or a flat characteristic by JP2.
5 5.8 CIRCUIT DESCRIPTION 5.8 External Squelch External Squelch The audio output can be muted through pin 8 of the receiver system connector P1. When pin 8 is pulled to less than 1 volt above ground, the micro-controller U15 will mute the audio output. This facility can be used to mute the audio during transmission, as is required in single frequency systems, by simply connecting pin 8 of the receiver to the transmitter T/R relay driver output (pin 16 on Eclipse transmitters). 5.
5.11 Voltage Regulator 5.11 5 CIRCUIT DESCRIPTION Voltage Regulator The dc input voltage is regulated down to 9.4 Vdc by a discrete regulator circuit. The series pass transistor Q20 is driven by error amplifiers Q21 and Q22. Q23 is used to start up the regulator and once the circuit turns on, it plays no further part in the operation. This circuit is short circuit and overload protected.
6 ALIGNMENT PROCEDURE Step 1 2 3 6.3 Step 1 2 3 4 5 6 7 Input Select alignment frequency channel Signal generator on centre frequency channel to J1. Modulation off. Signal generator on centre frequency channel to J1. Modulation off. 6.3 IF Alignment Measure dc Volts on test socket pin 9 to pin 1 dc Volts on test socket pin 7 to pin 1 Adjust L34 to read 4.00Vdc dc Volts on test socket pin 7 to pin 1 L29, 31, 36, 38 for maximum reading.
6.4 6 ALIGNMENT PROCEDURE Line Level Adjustment 6.4 Line Level Adjustment Step 1 Input Signal generator on centre frequency channel to J1. Modulation ON. Level 1 millivolt Measure Audio level test socket pin 6 to pin 1 Adjust RV3 for 390 mV rms 6.5 Reference Oscillator Calibration Step 1 7 Input None required Measure Frequency junction of R69 and R26 on the top of the PCB. (LO input to the mixer) Adjust C181 or XO1 for L.O. +/-100 Hz L.O. = Fc+45 MHz Specifications 7.
7 7.1.4 SPECIFICATIONS 7.1.4 Channel Selection Channel Selection Channel selection is by eight channel select lines. These are available through the rear panel connector. A BCD active high code applied to the lines selects the required channel. This can be supplied by pre-wiring the rack connector so that each rack position is dedicated to a fixed channel. BCD switches inside the receiver can be used to pre-set any desired channel. These eliminate the need to externally select the channel. 7.1.
7.3.3 Test Points 7.3.3 7 SPECIFICATIONS Test Points Line Output Level - 1 + Gnd Receive Signal Strength - 1 + Gnd Tuning Voltage - 1 + Gnd Serial Data (RS232) - 2 + Gnd 7.4 Electrical Specifications 7.4.1 Power Requirements Operating Voltage - 10.5 to 16 Vdc Current Drain - 250mA Max. Polarity - Negative Ground 7.4.2 Frequency Range and Channel Spacing 215 – 240 MHz 12.5KHz 7.4.3 Frequency Synthesizer Step Size 5.0 or 6.25 KHz 7.4.4 Frequency Stability +/- 1 ppm, 0 to +60 C 7.4.
7 SPECIFICATIONS 7.4.6 7.4.6 IF Frequencies IF Frequencies First IF frequency 45 MHz Second IF frequency 455 KHz 7.4.7 Sensitivity -120 dBm Max. for 12 dB SINAD -117 dBm Max. for 20 dB Quieting 7.4.8 Selectivity 12 KHz spacing - 70dB per ECR-235 7.4.9 Spurious and Image Rejection 90dB 7.4.10 Intermodulation 80dB 7.4.11 Modulation Acceptance BW 12.5 KHz spacing - 3.75 KHz per RS204C 7.4.12 Noise Squelch Adjustment Range: 6 - 18 dB SINAD Attack Time: 20 mSec.
7.4.13 Carrier Level Squelch 7.4.13 7 SPECIFICATIONS Carrier Level Squelch Carrier level squelch can be used when it is necessary to set the opening point above 26dB SINAD as may be required in link applications. The minimum adjustment range is 1 to 200µ V. 7.4.14 Receiver Frequency Spread Less than 1 dB change in sensitivity over the band 7.4.15 Receiver Conducted Spurious Emissions Less than -57dBm from 1 to 2900 MHz 7.4.
7 SPECIFICATIONS Logic Input Levels: 7.4.20 Carrier Operated Switch Output 0 = < 0.4 Volts 1 = > 3.5 Volts Internal 10K pull down resistors selects Channel 00 when all inputs are O/C. 7.4.20 Carrier Operated Switch Output Floating Opto-Coupler Output: The carrier operated switch output is via an optocoupler. Collector and emitter connections are available to allow connection for source or sink.
7 SPECIFICATIONS 7.4.21 CTCSS Frequency No Tone EIA Number 67.0 69.4 71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5 94.8 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 159.8 162.2 165.5 167.9 171.3 173.8 177.3 179.9 183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5 210.7 218.1 225.7 229.1 233.6 241.8 250.3 254.
7 SPECIFICATIONS 7.4.22 7.4.22 External Squelch Input External Squelch Input An external input is provided to squelch or mute the receiver audio output. This may be used in conjunction with an external decoder or to mute the receiver during transmissions. External Squelch Input can be connected to the T/R Relay pin on Eclipse transmitters mute the receiver during transmission. 7.5 Connectors 7.5.1 Antenna Connector Type N Female Mounted on the module rear panel 7.5.
B Parts List C1 CAP 1N0 5% 63V NPO SM1206 46/3300/01N0 C10 CAP 100N 10% 50V X7R RD.2 46/2001/100N C100 CAP 100N 10% 50V X7R RD.2 46/2001/100N C101 CAP 4N7 10% COG RAD.2 46/2000/04N7 C102 CAP 27P 2% 100V NPO RAD.1 45/2680/027P C103 CAP 1N5 10% 50V COG RAD.2 46/2000/01N5 C104 CAP 100N 5% 50V MKT RD.2 47/2007/100N C105 CAP 470U 25V RB ELECTRO 41/2001/470U C106 CAP 100N 10% 50V X7R RD.2 46/2001/100N C107 CAP 10N 1% 63V KP7.5 47/2007/010N C108 CAP 10N 1% 63V KP7.5 47/2007/010N C109 CAP 10N 1% 63V KP7.
46/3300/010P C17 CAP 33P 2% 100V NPO RAD.1 45/2680/033P C170 CAP 1N0 5% 63V NPO SM1206 46/3300/01N0 C171 CAP 1N0 5% 63V NPO SM1206 46/3300/01N0 C172 CAP 47P 5% 63V NPO SM1206 46/3300/047P C173 C174 C175 CAP 10P 5% 63V NPO SM1206 46/3300/010P C176 CAP 1N0 5% 63V NPO SM1206 46/3300/01N0 C177 CAP 47P 5% 63V NPO SM1206 46/3300/047P C178 C179 C18 CAP 33P 2% 100V NPO RAD.1 45/2680/033P C180 CAP 1N0 5% 63V NPO SM1206 46/3300/01N0 C185 CAP 10N 10% 50V X7R RAD.2 46/2001/010N C186 CAP 100N 10% 50V X7R RD.
C84 CAP 1N0 5% 63V NPO SM1206 46/3300/01N0 C85 CAP 1N0 5% 63V NPO SM1206 46/3300/01N0 C86 CAP 1N0 5% 63V NPO SM1206 46/3300/01N0 C87 CAP 4P7 5% 63V NPO SM1206 46/3300/04P7 C88 CAP 100N 10% 63V X7R 1206 46/3310/100N C89 CAP 100N 10% 50V X7R RD.2 46/2001/100N C9 CAP 68P 5% 63V NPO SM1206 46/3300/068P C90 CAP 1N2 5% NPO RAD.2 46/2000/01N2 C91 CAP 1UO 10% 50V MKT 47/2007/01U0 C92 CAP 100N 5% 50V MKT RD.2 47/2007/100N C93 CAP 22N 10% 63V MKT RAD.2 47/2007/022N C94 CAP 1N2 5% NPO RAD.
37/2021/680N L9 INDUCTOR 1.5u 10mm 37/2021/1.5U MA1 AMP MMIC MWA0211L SOT143 24/3010/211L MA2 AMP MMIC VAM-6 24/3010/VAM6 MA3 AMP MMIC MWA0211L SOT143 24/3010/211L MA4 AMP MMIC MWA0211L SOT143 24/3010/211L MX1 MIXER RFMX 1-13 37/2070/0113 P1 FILT D RT AGL 25W M 1NF 35/5011/025M P2 FILT D RT AGL 9W F FERRIT 35/5012/009F PROG.
R140 RES 680 5% 0.25W AXIAL 51/1040/0680 R141 RES 4K7 5% 0.25W AXIAL 51/1040/04K7 R142 RES 10M 5% 0.25W AXIAL 51/1040/010M R143 RES 4K7 5% 0.25W AXIAL 51/1040/04K7 R144 RES 4K7 5% 0.25W AXIAL 51/1040/04K7 R145 RES 4K7 5% 0.25W AXIAL 51/1040/04K7 R146 RES 10M 5% 0.25W AXIAL 51/1040/010M R147 RES 10K 5% 0.25W AXIAL 51/1040/010K R148 RES 1K0 5% 0.25W AXIAL 51/1040/01K0 R149 RES 5K11 1% 0.25W AXIAL 51/1010/5K11 R150 RES 2K2 5% 0.25W AXIAL 51/1040/02K2 R151 RES 680 5% 0.25W AXIAL 51/1040/0680 R152 RES 5K11 1% 0.
R54 RES 3K3 5% 0.25W AXIAL 51/1040/03K3 R55 RES 2K2 5% 0.25W AXIAL 51/1040/02K2 R56 RES 1K0 5% 0.25W AXIAL 51/1040/01K0 R57 RES 4K7 5% 0.25W AXIAL 51/1040/04K7 R58 RES 2K2 5% 0.25W AXIAL 51/1040/02K2 R59 RES 560 5% 0.25W AXIAL 51/1040/0560 R6 RES 47R 5% 0.25W SM1206 51/3380/0047 R60 RES 10K 5% 0.25W AXIAL 51/1040/010K R61 RES 1K0 5% 0.25W AXIAL 51/1040/01K0 R62 RES 1K0 5% 0.25W AXIAL 51/1040/01K0 R63 RES 1K0 5% 0.25W AXIAL 51/1040/01K0 R64 RES 1K0 5% 0.25W AXIAL 51/1040/01K0 R65 RES 1K0 5% 0.
37/2022/0311 L31 COIL 37/2022/0311 L34 COIL 37/2021/0310 L36 COIL 37/2022/0311 L38 COIL 37/2022/0311 10mm 2T SHLD FRT COR 1 turn 10mm 2T SHLD FRT COR 10mm 2T SHLD FRT COR CF1 FILTER CERAMIC CFS455G 34/2000/CFSG R15 RES 470 5% 0.25W AXIAL 51/1040/0470 R24 RES 33K 5% 0.25W AXIAL 51/1040/033K R220 TCXO Ref. Osc. XO1 TCXO 12 MHz,HI-Q TCO474 32/3031/12.
