Ritron RIT13-144 用户手册
TABLE OF CONTENTS
SST-144
TOPIC PAGE
IMPORTANT MAINTENANCE/REPAIR INFORMATION .. 1
SPECIFICATIONS
GENERAL......................................................................... 2
CONTROLS ...................................................................... 2
TRANSMITTER................................................................. 2
RECEIVER........................................................................ 3
BATTERY ......................................................................... 3
CONTROLS ...................................................................... 2
TRANSMITTER................................................................. 2
RECEIVER........................................................................ 3
BATTERY ......................................................................... 3
INTRODUCTION
GENERAL......................................................................... 4
Model Identification ..................................................... 4
FCC REGULATIONS
Licensing..................................................................... 4
Safety Standards......................................................... 4
Safety Standards......................................................... 4
BATTERY CARE
CHARGING....................................................................... 5
PRECAUTIONS ................................................................ 5
BATTERY REPLACEMENT.............................................. 5
PRECAUTIONS ................................................................ 5
BATTERY REPLACEMENT.............................................. 5
Fig. 1 Battery Replacement......................................... 5
BATTERY MAINTENANCE............................................... 6
BATTERY CONDITIONING .............................................. 6
BATTERY CONDITIONING .............................................. 6
OPERATION
DESCRIPTION OF CONTROLS AND CONNECTORS..... 7
Fig. 2 Controls and Accessory Connectors.................. 7
RADIO OPERATION
On-Off/Volume ............................................................ 8
Receive ....................................................................... 8
Selective Signaling Squelch ........................................ 8
Monitor ........................................................................ 8
Battery Saver .............................................................. 8
Transmit...................................................................... 8
Channel Selection ....................................................... 8
Receive ....................................................................... 8
Selective Signaling Squelch ........................................ 8
Monitor ........................................................................ 8
Battery Saver .............................................................. 8
Transmit...................................................................... 8
Channel Selection ....................................................... 8
WHAT THE RADIO TONES MEAN
Power On/Self Check “OK........................................... 9
Error Tones ................................................................. 9
Channel Select............................................................ 9
Tone Squelch.............................................................. 9
Recharge Battery Alert ................................................ 9
Error Tones ................................................................. 9
Channel Select............................................................ 9
Tone Squelch.............................................................. 9
Recharge Battery Alert ................................................ 9
OPTIONAL RADIO TONES
Receiver Squelch Tone ............................................... 9
Busy Channel Inhibit ................................................... 9
Transmitter Time Out .................................................. 9
Busy Channel Inhibit ................................................... 9
Transmitter Time Out .................................................. 9
BELT CLIP INSTALLATION.............................................. 9
TROUBLESHOOTING
TROUBLESHOOTING
General ..................................................................... 10
Battery ...................................................................... 10
Error Tones ............................................................... 10
Tone Coded Squelch................................................. 10
Battery ...................................................................... 10
Error Tones ............................................................... 10
Tone Coded Squelch................................................. 10
PROGRAMMING THE RADIO
PTT (PUSH-TO-TALK) PROGRAMMING
Fig. 3 Placing the Radio in Program / Readout Mode 11
Reading Out a Radio Channel’s Content................... 11
PTT Programming the Radio..................................... 12
Return To Normal Operation ..................................... 12
PTT Programming Mistakes...................................... 12
Table 1 – PTT Programming Frequency Table.......... 13
Table 2 – Quiet Call Codes and Frequencies ............ 13
Reading Out a Radio Channel’s Content................... 11
PTT Programming the Radio..................................... 12
Return To Normal Operation ..................................... 12
PTT Programming Mistakes...................................... 12
Table 1 – PTT Programming Frequency Table.......... 13
Table 2 – Quiet Call Codes and Frequencies ............ 13
COMPUTER SOFTWARE COPYRIGHTS ...................... 13
PC COMPUTER PROGRAMMING ................................. 13
PC COMPUTER PROGRAMMING ................................. 13
Programmable Features............................................ 14
Description of Features ............................................. 15
Description of Features ............................................. 15
TOPIC PAGE
THEORY OF OPERATION
INTRODUCTION .............................................................16
POWER SUPPLY AND VOLTAGE DISTRIBUTION........16
POWER SUPPLY AND VOLTAGE DISTRIBUTION........16
Power Strobe.............................................................16
Low Battery Voltage Detection...................................16
Low Battery Voltage Detection...................................16
REFERENCE OSCILLATOR ...........................................16
SYNTHESIZER ..............................................................16
SYNTHESIZER ..............................................................16
Pin Numbers..............................................................16
Prescaler Divider / Synthesizer Controller..................16
VCO / Buffer Amplifiers .............................................17
Oscillator Modulation .................................................17
Prescaler Divider / Synthesizer Controller..................16
VCO / Buffer Amplifiers .............................................17
Oscillator Modulation .................................................17
DIGITAL POTENTIOMETERS.........................................17
RECEIVER ......................................................................17
RECEIVER ......................................................................17
RF Amplifier...............................................................17
1st Mixer....................................................................18
FM Receiver Subsystem............................................18
Voice / Tone Conditioning in Receiver Mode .............18
Voice Band ................................................................18
Sub-Audible ...............................................................18
Audio Amplifier ..........................................................18
1st Mixer....................................................................18
FM Receiver Subsystem............................................18
Voice / Tone Conditioning in Receiver Mode .............18
Voice Band ................................................................18
Sub-Audible ...............................................................18
Audio Amplifier ..........................................................18
ANTENNA SWITCHING / LOW-PASS FILTER ...............19
TRANSMITTER ...............................................................19
TRANSMITTER ...............................................................19
Keying .......................................................................19
+VTX Supply..............................................................19
Power Amplifier .........................................................19
Voice/Tone Conditioning in Transmit Mode ...............19
Voice Band ................................................................19
Sub-Audible ...............................................................19
+VTX Supply..............................................................19
Power Amplifier .........................................................19
Voice/Tone Conditioning in Transmit Mode ...............19
Voice Band ................................................................19
Sub-Audible ...............................................................19
MICROCONTROLLER ....................................................20
ALIGNMENT PROCEDURE
RECOMMENDED TEST EQUIPMENT............................21
RADIO PREPARATION...................................................21
REFERENCE FREQUENCY ...........................................21
MODULATION BALANCE ...............................................22
TRANSMITTER TONE DEVIATION ................................22
TRANSMITTER VOICE DEVIATION ...............................22
TRANSMITTER POWER.................................................22
RECEIVER SENSITIVITY AND SQUELCH.....................23
RECEIVER NOISE SQUELCH ........................................23
SYNTHESIZER ...............................................................23
RADIO PREPARATION...................................................21
REFERENCE FREQUENCY ...........................................21
MODULATION BALANCE ...............................................22
TRANSMITTER TONE DEVIATION ................................22
TRANSMITTER VOICE DEVIATION ...............................22
TRANSMITTER POWER.................................................22
RECEIVER SENSITIVITY AND SQUELCH.....................23
RECEIVER NOISE SQUELCH ........................................23
SYNTHESIZER ...............................................................23
VOLTAGE CHART
Measurement Conditions .................................................24
SST-144 Voltages ...........................................................24
SST-144 Voltages ...........................................................24
PARTS LIST
SCHEMATIC REFERENCE PARTS LIST .......................27
CASE ASSEMBLY PARTS LIST .....................................33
CASE ASSEMBLY PARTS LIST .....................................33
SCHEMATIC AND PART PLACEMENT DRAWINGS
TOP SIDE PART PLACEMENT.......................................35
BOTTOM SIDE PART PLACEMENT...............................36
SCHEMATIC – UHF RF ..................................................37
SCHEMATIC – Signal Processing ...................................38
BOTTOM SIDE PART PLACEMENT...............................36
SCHEMATIC – UHF RF ..................................................37
SCHEMATIC – Signal Processing ...................................38