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RF Technology R70/R71 and R150

Page 23

7.4.21 CTCSS

7 SPECIFICATIONS

Frequency

EIA Number

No Tone

67.0

A1

69.4

71.9

B1

74.4

C1

77.0

A2

79.7

C2

82.5

B2

85.4

C3

88.5

A3

91.5

C4

94.8

B3

97.4

100.0

A4

103.5

B4

107.2

A5

110.9

B5

114.8

A6

118.8

B6

123.0

A7

127.3

B7

131.8

A8

136.5

B8

141.3

A9

146.2

B9

151.4

A10

156.7

B10

159.8

162.2

A11

165.5

167.9

B11

171.3

173.8

A12

177.3

179.9

B12

183.5

186.2

A13

189.9

192.8

B13

196.6

199.5

203.5

A14

206.5

210.7

B14

218.1

A15

225.7

B15

229.1

233.6

A16

241.8

B16

250.3

A17

254.1

Table 4: Tone Squelch Frequencies

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Summary of Contents for Eclipse R150

Page 1: ...hnology rfinfo rftechnology com au May 2005 R70 R71 and R150 Receiver Operation and Maintenance Manual This manual is produced by RF Technology Pty Ltd 10 8 Leighton Place Hornsby 2077 Australia Copyright 1997 RF Technology ...

Page 2: ... JP11 EPROM Type 8 2 9 JP13 Squelch Defeat pcb 30 9132 0002 or later 9 2 10 JP19 LED Alarm output pcb 30 9132 0002 or later 9 3 Receiver I O Connections 10 3 1 25 Pin Connector 10 4 Channel and Tone Frequency Programming 11 5 Circuit Description 11 5 1 RF Section 11 5 2 IF Section 11 5 3 VCO Section 12 5 4 PLL Section 12 5 5 Audio Signal Processing 13 5 6 Noise Filter Amplifier and Detector 13 5 7...

Page 3: ... 19 7 4 4 Frequency Stability 19 7 4 5 Nominal Antenna Impedance 19 7 4 6 IF Frequencies 20 7 4 7 Sensitivity 20 7 4 8 Selectivity 20 7 4 9 Spurious and Image Rejection 20 7 4 10 Inter modulation 20 7 4 11 Modulation Acceptance BW 20 7 4 12 Noise Squelch 20 7 4 13 Carrier Level Squelch 21 7 4 14 Receiver Frequency Spread 21 7 4 15 Receiver Conducted Spurious Emissions 21 7 4 16 Audio Frequency Res...

Page 4: ...ker connected to the test socket It does not effect the level of the 600Ω line or direct audio output 1 1 2 Mon SQ The Mon SQ switch allows all squelch functions controlling the monitor output to be disabled When the switch is in the Mon SQ position the audio at the monitor speaker is controlled by the noise detector The CTCSS carrier and external squelch functions are disabled This can be useful ...

Page 5: ...l open and close in less than 2 mSec In most base station applications carrier squelch is disabled by turning the adjustment counter clockwise until the screw clicks The carrier squelch may be set to a predetermined level with the Techelp Service Monitor 2000 software or by using the following procedure 1 First turn the adjustment fully counter clockwise Then set the noise squelch as above 2 Conne...

Page 6: ...link 1 flash pause dc supply voltage low or high LED ON continuously External squelch is active Table 1 Interpretations of LED flash cadence Receivers using software issue 4 and lower use the LED flash rate to indicate the alarm condition Refer to table 2 Indication Fault condition Flashing 8 per second Synthesizer unlocked Flashing 4 per second Tuning voltage outside 2 7 Vdc Flashing 2 per second...

Page 7: ...tput audio transformer to be broken to permit dc signaling via the audio pair or wires Condition Position dc Loop Configured by JP7 JP8 JP9 1 2 dc Loop Not used 2 3 2 5 JP6 COS Polarity Condition Position Active on Signal 2 3 Active on No Signal 1 2 2 6 JP7 JP8 JP9 dc Loop COS Configuration JP4 1 2 These settings are relevant when the Carrier Operated Switch COS signal is to be used across the sam...

Page 8: ... 12 Vdc Direct Output 2 3 OFF OFF Free Switch Output 1 2 OFF OFF 2 8 JP11 EPROM Type Condition Position 27C256 2 3 27C64 1 2 2 9 JP13 Squelch Defeat pcb 30 9132 0002 or later Normal squelch can be defeated with an active low signal at DB 25 pin 19 Condition Position Squelch operation normal 1 2 Squelch Defeat 2 3 2 10 JP19 LED Alarm o p pcb 30 9132 0002 or later The LED alarm can be brought out to...

Page 9: ...ate Sw Tx Rx output T R 16 4 TONE Subtone output Hi Z audio input AUD 4 17 AUDIO Audio output Hi Z audio input AUD 17 5 AGND Audio Ground Ext tone input TONE 5 18 DISC Discriminator output Ext tone input TONE 18 6 LINE Line output Line input LINE 6 20 LINE Line output Line input LINE 20 8 EXT SQ Ext Squelch input Auto Level Control ALC 8 13 25 GND Ground 0V GND 13 25 21 BCD 1 Channel select 1 s di...

Page 10: ...pen Circuit or 0 Vdc 1 5 to 16 Vdc RS232 Data In Out 15 2 Test and Programming use 9600 8 data 2 stop bits 600Ω Line In Out 20 6 Transformer Isolated Balanced 0dBm Output 150Ω Hybrid 7 19 Discriminator 18 AC coupled unsquelched Direct Audio Output 17 Direct AC Coupled Audio Audio Ground 5 Direct Audio Ground Sub Audible Audio Out 4 Unsquelched 1 250 Hz Carrier Operated Sw Carrier Operated Sw COS C...

Page 11: ... supplied by the frequency synthesizer through voltage follower U28D The circuit values are chosen so that the centre frequency tracks the VCO frequency RF amplifier transistor Q1 is followed by a second two pole voltage tuned filter D15 D16 L28 32 which provides additional image and spurious frequency rejection The filter output is connected to the RF input port of the mixer MX1 MX1 is a high lev...

Page 12: ...t channel rejection but is used to reduce the wide band noise input to the limiter section of U3 The limiter section of U3 drives the quadrature detector discriminator C31 and IF tuned circuit L10 comprise the discriminator phase shift network U3 also has a received signal strength indicator output RSSI The RSSI voltage connects to the test socket for alignment use The RSSI voltage is also used by...

Page 13: ...nitor output can be set for noise squelch only operation by S1 The audio from U17a is adjusted by the volume control before connecting to the monitor output amplifier U5 U5 drives the internal speaker and can also supply 3 5 watts to an external loudspeaker The audio from U17b is adjusted by RV3 before connecting to the line output IC U22a b U22 is a dual amplifier connected in a bridge configurat...

Page 14: ...ips The processor U15 includes EE memory for channel frequencies tones and other information It also has an asynchronous serial port and an analog to digital converter The program is stored in U12 a CMOS EPROM U13 is an address latch for the low order address bits U11 is used to read the channel select lines onto the data bus U7 is an address decoder for U11 and U12 U14 is a supervisory chip which...

Page 15: ...lignment Procedure The following procedures may be used to align the receiver for optimum performance Normally only RF alignment will be required when changing frequencies IF alignment should only be necessary after repairs on that part of the circuit Reference oscillator or TCXO calibration may be required periodically due to crystal aging The aging should be less than 1 ppm year 6 1 Standard Inp...

Page 16: ...y channel to J1 Modulation OFF dc Volts in test socket pin 7 to pin 1 Generator level to read 1 2 Vdc 2 As Above As Above L5 L6 L7 L8 for maximum reading Reduce generator output to keep below 2 Vdc 3 Set generator level to 10 µV Frequency U3 pin 9 L9 to read 455 KHz 10Hz 4 Set generator level to 1 millivolt Modulation ON Audio level test socket pin 6 to pin 1 Line level RV3 to obtain approx 1Vrms ...

Page 17: ...ion with transmitter and power supply modules as a base station or as a stand alone receiver All necessary control and 600Ω line interface circuitry is included 7 1 1 Channel Capacity Although most applications are single channel it can be programmed for up to 100 channels numbered 0 99 This is to provide the capability of programming all channels into all of the receivers used at a given site 7 1...

Page 18: ...er and squelch functions and facilitate the channel frequency programming With the standard software it also can provide fault monitoring and reporting 7 2 Physical Configuration The receiver is designed to fit in a 19 inch rack mounted frame The installed height is 4 RU 178 mm and the depth 350 mm The receiver is 63 5 mm or two Eclipse modules wide 7 3 Front Panel Controls Indicators and Test Poi...

Page 19: ...ts Operating Voltage 10 5 to 16 Vdc Current Drain 250mA Max Polarity Negative Ground 7 4 2 Frequency Range and Channel Spacing Frequency 25 KHz 12 5 KHz 66 84 MHz R70A R71A R70AN R71AN 70 88 MHz R70A R71A R70AN R71AN 136 156 MHz R150A R150AN 148 168 MHz R150B R150BN 154 174 MHz R150B R150BN 7 4 3 Frequency Synthesizer Step Size 5 0 or 6 25 KHz 7 4 4 Frequency Stability 5 ppm 0 to 60 C Standard for...

Page 20: ...70dB per ECR 235 7 4 9 Spurious and Image Rejection 90dB 7 4 10 Inter modulation 80dB 7 4 11 Modulation Acceptance BW 25 KHz spacing 7 5 KHz per RS204C 12 5 KHz spacing 3 75 KHz per RS204C 7 4 12 Noise Squelch Adjustment Range 6 26dB SINAD 25KHz versions 6 18 dB SINAD 12 5 KHz versions Attack Time 20 mSec above 20dB Quieting Release Time 150 mSec at 20dB Quieting decreasing to 20ms above 2µV prese...

Page 21: ... to 2900 MHz 7 4 16 Audio Frequency Response 600ΩLine and Direct Output 1 3dB 300 3000 Hz relative to either a flat response or 750µs de emphasis with the high pass and notch filters bypassed 1 6 dB with the filters in circuit Sub Audio Output 1 3dB 67 250 Hz 7 4 17 Audio Output Level 600ΩLine Adjustable 10 to 10dBm Monitor Loudspeaker 5 Watts with external speaker 0 3 Watt with internal speaker D...

Page 22: ... source or sink The opto coupler can be linked inside the receiver to be ON when a carrier is detected or to be ON in the absence of carrier Connection to Remote Switch via 600Ω Line Internal connections are provided so that the opto coupler can be connected to the 600Ω line for use over a single pair This permits remote switching with no extra connections Current Source Sink Collector Voltage The...

Page 23: ... C4 94 8 B3 97 4 100 0 A4 103 5 B4 107 2 A5 110 9 B5 114 8 A6 118 8 B6 123 0 A7 127 3 B7 131 8 A8 136 5 B8 141 3 A9 146 2 B9 151 4 A10 156 7 B10 159 8 162 2 A11 165 5 167 9 B11 171 3 173 8 A12 177 3 179 9 B12 183 5 186 2 A13 189 9 192 8 B13 196 6 199 5 203 5 A14 206 5 210 7 B14 218 1 A15 225 7 B15 229 1 233 6 A16 241 8 B16 250 3 A17 254 1 Table 4 Tone Squelch Frequencies ...

Page 24: ...ion 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 to mute the receiver during transmission 7 5 Connectors 7 5 1 Antenna Connector Type N Female Mounted on the module rear panel 7 5 2 Power I O Connector 25 pin D Male Mounted on the rear panel 7 5 3 Test Connector 9 pin D Female mounted on t...

Page 25: ... 2 JP7 JP8 JP9 dc Loop COS Configuration JP4 1 2 JP7 JP8 JP9 Source l2Vdc Loop 2 3 ON 1 2 Free Switch Output 1 2 ON 2 3 JP7 JP8 JP9 Direct Output COS JP4 2 3 JP7 JP8 JP9 12 Vdc Direct Output 2 3 OFF OFF Free Switch Output 1 2 OFF OFF JP11 EPROM Type Position 27C256 2 3 27C64 1 2 THE FOLLOWING JUMPERS ARE VALID ON RX PCB VERSION 30 9132 0002 OR LATER JP13 Squelch Defeat Position Squelch operation n...

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