RF Technology R220 Operation And Maintenance Manual
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RF Technology R220 Operation And Maintenance Manual

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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. PCB 30/9132

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  • Page 1 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. PCB 30/9132...

  • Page 2: Table Of Contents

    Noise Filter, Amplifier and Detector Subtone Filter and CTCSS External Squelch Microprocessor Controller 5.10 Carrier Operated Switch 5.11 Voltage Regulator Alignment Procedure Standard Input Signal RF Alignment IF Alignment Line Level Adjustment Reference Oscillator Calibration Page 2 RF Technology R220...
  • Page 3 Audio Frequency Response 7.4.17 Audio Output Level 7.4.18 Audio Distortion 7.4.19 Channel Select Input/Output 7.4.20 Carrier Operated Switch Output 7.4.21 CTCSS 7.4.22 External Squelch Input Connectors 7.5.1 Antenna Connector 7.5.2 Power and I/O Connector 7.5.3 Test Connector RF Technology R220 Page 3...
  • Page 4 CONTENTS CONTENTS Parts List Page 4 RF Technology R220...

  • Page 5: Operating Instructions

    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 local authorities. Technology equipment is subject to continual...

  • Page 6: Line

    1.1.6 PWR LED The PWR LED shows that the dc supply is connected to the receiver. 1.1.7 SQ LED The SQ LED comes on when the audio to the line and direct outputs is un-squelched. Page 6 RF Technology R220...

  • Page 7: Alarm Led

    In the following subsections an asterisk (*) signifies the standard (Ex-Factory) configuration of a jumper. JP1: 240 Hz Notch Filter JP1 allows the 240Hz notch filter in the normal audio path to be bypassed. Condition Position Notch Filter In 1-2 * Notch Filter Out RF Technology R220 Page 7...

  • Page 8: Jp2: Audio Response

    Refer to setting of JP4, in section 2.4. They control the levels and connection into the audio balanced line circuitry. Condition Source +12 Vdc Loop 1-2 * Free Switch Output Page 8 RF Technology R220...

  • Page 9: Jp7, Jp8, Jp9: Direct Output Cos

    In this arrangement, the COS signal is taken via the separate COS+ and COS- outputs, either with free (floating) output or with +12Vdc pull-up. Condition +12 Vdc Direct Output Free Switch Output JP11 EPROM Type Condition Position 27C256 2-3 * 27C64 * = Standard Ex-Factory Configuration RF Technology R220 Page 9...
  • Page 10 Channel select 1’s digit BCD 8 BCD 10 Channel select 10’s digit BCD 10 BCD 20 Channel select 10’s digit BCD 20 BCD 40 Channel select 10’s digit BCD 40 BCD 80 Channel select 10’s digit BCD 80 Page 10 RF Technology R220...

  • Page 11: Receiver I/O Connections

    Carrier Operated Sw Opto-coupled Transistor Carrier Operated Sw Switch (10mA) External Squelch Input <1 Vdc to Squelch >2 Vdc or open ckt to unsquelch Table 3: Pin connections and explanations for the main, 25-pin, D-shell Connector RF Technology R220 Page 11...

  • Page 12: Channel And Tone Frequency Programming

    TecHelp/Service Monitor 2000 can be supplied by your dealer, distributor or by contacting RF Technology direct. Circuit Description The following descriptions should be read as an aid to understanding the block and schematic diagrams at the rear of this manual.

  • Page 13: Vco Section

    The phase detector output signals of U4 are used to control two switched current sources. The output of the positive and negative sources' Q10 and Q16, produce the tuning voltage which is smoothed by the loop filter components to bias the VCO varactor diode D4. RF Technology R220 Page 13...

  • Page 14: Audio Signal Processing

    U15 it can decode all 38 EIA tones and 12 additional commonly used tones. The decode bandwidth is set to 1% but may be changed to 2% by a jumper on the printed circuit board. Page 14 RF Technology R220...

  • Page 15: External Squelch

    The generic term ``Carrier Operated Switch'' may be misleading in this case. SINCE, if a sub-audible tone has been programmed for the channel in use, the COS is controlled by carrier and tone detection. RF Technology R220 Page 15...

  • Page 16: Voltage Regulator

    RF Signal Generator 50 Ω output impedance Frequency range 215 - 240 MHz FM modulation at 1KHz 1.5KHz peak for 12.5KHz channel spacing 6.2 RF Alignment Alignment Frequency 215 - 240 MHz range 221.000 MHz Page 16 RF Technology R220...

  • Page 17: If Alignment

    Reduce generator approx. 25 µ V pin 6 to pin 1 level to obtain 12 Db SINAD. Carefully adjust L5, L6, L7, L8 to obtain the best SINAD. Reduce generator output to maintain 12 dB SINAD RF Technology R220 Page 17...

  • Page 18: Line Level Adjustment

    RF and tone frequency combination. 7.1.3 Channel Programming The channelling information is stored in a non-volatile memory chip and can be programmed via the front panel test connector using a PC and RF Technology supplied TecHelp/Service Monitor 2000 software. Page 18 RF Technology R220...

  • Page 19: Channel Selection

    Line Output Level - screwdriver adjust multiturn pot Noise Squelch Setting - screwdriver adjust multiturn pot Carrier Squelch Setting - screwdriver adjust multiturn pot 7.3.2 Indicators Power ON - Green LED Squelch Open - Yellow LED Fault Indicator - Flashing Red LED RF Technology R220 Page 19...

  • Page 20: Test Points

    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 7.4.5 Nominal Antenna Impedance 50 Ω Page 20 RF Technology R220...

  • Page 21: If Frequencies

    6 - 18 dB SINAD Attack Time: 20 mSec. above 20dB Quieting 150 mSec. at 20dB Quieting decreasing to 20ms above 2 µ V Release Time: preset threshold Hysteresis: Hysteresis is equal to approximately 2dB change in noise quieting RF Technology R220 Page 21...

  • Page 22: Carrier Level Squelch

    750 µ µ µ µ s De-Emphasis: Less than 3% at 1 KHz and 60% of rated system deviation Flat Response: Less than 5% at 1 KHz and 60% of rated system deviation 7.4.19 Channel Select Input/Output Coding : 8 lines BCD coded 00-99 Page 22 RF Technology R220...

  • Page 23: Carrier Operated Switch Output

    Ic = 10mA Maximum Vc = 30 Volts Maximum 7.4.21 CTCSS The CTCSS decoding is provided by a hybrid module. This provides programmable decoding of all 38 EIA and 12 other common tones. Refer to table 4. RF Technology R220 Page 23...
  • Page 24 131.8 136.5 141.3 146.2 151.4 156.7 159.8 162.2 165.5 167.9 171.3 173.8 177.3 179.9 183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5 210.7 218.1 225.7 229.1 233.6 241.8 250.3 254.1 Table 4: Tone Squelch Frequencies Page 24 RF Technology R220...

  • Page 25: External Squelch Input

    25-pin ``D'' Male Mounted on the rear panel 7.5.3 Test Connector 9-pin ``D'' Female mounted on the front panel Engineering Diagrams A.1 Circuit diagram Figure 1 shows the detailed schematic diagram with component numbers and values RF Technology R220 Page 25...
  • Page 26 CAP 10N 10% 50V X7R RAD.2 C131 CAP 1UO 10% 50V MKT 46/2001/010N 47/2007/01U0 C167 CAP 10U 35V RAD ELECTRO C132 CAP 1UO 10% 50V MKT 41/2001/010U 47/2007/01U0 C169 CAP 10P 5% 63V NPO SM1206 Page 26 RF Technology R220...
  • Page 27 CAP 10N 10% 50V X7R RAD.2 CAP 100N 10% 63V X7R 1206 46/2001/010N 46/3310/100N CAP 47N 20% 50V X7R RD.2 CAP 1N0 5% 100V NPO RAD.2 46/2001/047N 46/2000/01N0 CAP 1N0 5% 63V NPO SM1206 CAP 10U 35V RAD ELECTRO 46/3300/01N0 RF Technology R220 Page 27...
  • Page 28 IND 220N 10% CHOKE SM1008 CON 3WAY HEADER 37/3320/220N 35/2501/0003 INDUCTOR 680N 10mm JP11 CON 3WAY HEADER 37/2021/680N 35/2501/0003 INDUCTOR 680N 10mm JP12 CON 2WAY HEADER 37/2021/680N 35/2501/0002 INDUCTOR 680N 10mm CON 3WAY HEADER 37/2021/680N 35/2501/0003 INDUCTOR 680N 10mm Page 28 RF Technology R220...
  • Page 29 R138 RES 5K11 1% 0.25W AXIAL 51/1040/010M 51/1010/5K11 R101 RES 6K49 1% 0.25W AXIAL R139 RES 47 5% 0.25W AXIAL 51/1010/6K49 51/1040/0047 R102 RES 28K7 1% 0.25W AXIAL RES 1K0 5% 0.25W AXIAL 51/1010/28K7 51/1040/01K0 RF Technology R220 Page 29...
  • Page 30 RES 3K3 5% 0.25W AXIAL RES 1K0 5% 0.25W AXIAL 51/1040/03K3 51/1040/01K0 R184 RES 3K3 5% 0.25W AXIAL RES 3K3 5% 0.25W AXIAL 51/1040/03K3 51/1040/03K3 R185 RES 470K 5% 0.25W SM1206 RES 1K0 5% 0.25W AXIAL 51/3380/470K 51/1040/01K0 Page 30 RF Technology R220...
  • Page 31 RES 5K6 5% 0.25W AXIAL CRYSTAL,45.455 HC-45/U 51/1040/05K6 32/2045/45M4 RES 100K 5% 0.25W AXIAL CRYSTAL 5.0MHz 51/1040/100K 32/2049/05M0 RES 150 5% 0.25W AXIAL CRYSTAL 8.0MHz 51/1040/0150 32/2049/08M0 RES 150K 5% 0.25W AXIAL 51/1040/150K COIL 10mm 2T SHLD FRT COR RF Technology R220 Page 31...
  • Page 32 COIL 10mm 2T SHLD FRT COR 37/2022/0311 COIL 10mm 2T SHLD FRT COR 37/2022/0311 FILTER CERAMIC CFS455G 34/2000/CFSG RES 470 5% 0.25W AXIAL 51/1040/0470 RES 33K 5% 0.25W AXIAL 51/1040/033K R220 TCXO Ref. Osc. TCXO 12 MHz,HI-Q TCO474 32/3031/12.0 Page 32 RF Technology R220...

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