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Glenayre Document Number: 9110.00148
Issue 1, Rev. C: 12/10/96
RL-903 Receiver
Table of Contents
6.3
6.4
6.5
7
8
9
Synthesizer and VCO Block-Diagram Description ........................................ 6-1
6-2
6.3.1
VCO
6 .3.2
PLL Synthesizer ............................................................................... 6-2
6.3.3
Reference Oscillators ........................................................................ 6-2
6 .3.4
Programming Logic .......................................................................... 6-2
IF Board...........................................................................................................6-4
6.4.1
IF Amplification and FM Detection ................................................. 6-4
6 .4.2
Audio Processing .............................................................................. 6-4
6 .4.3
Squelch and RSSI ............................................................................. 6-4
6.4.4
Fault Reporting................................................................................. 6-5
6.4.5
Keying
6-5
Line Driver Circuit (optional) (IF board)........................................................ 6-5
MAINTENANCE ..................................................................................................... 7-1
7 .1
Test Conditions ................................................................................................7-1
7.2
Power Supply (PS/A board unless noted) ....................................................... 7-1
7.3
Local Oscillator Setup (synthesizer board, unless noted) ............................... 7-1
7.4
VCO Tuning (synthesizer board unless noted) ............................................... 7-2
7.5
RF and IF Tuning (IF board unless noted) ...................................................... 7-2
7.6
Squelch and RSSI Adjustment (IF board unless noted) ..................................7-6
7.7
Audio Level Adjustment (IF board unless noted) ........................................... 7-9
CHECKOUT AND TROUBLESHOOTING ........................................................ 8-1
8.1
Power Supply (PS/A board unless noted) ...................................................... 8-1
8.2
Audio (IF board unless noted) .........................................................................8-1
8.3
Synthesizer, Frequency, and Reference Oscillator ......................................... 8-2
8.4
RF, IF, and Squelch (IF board unless noted) ..................................................8-2
REMOVAL AND REINSTALLATION ................................................................9-1
9.1
Access to Internal Assemblies........................................................................ 9-1
9.2
PS/A Board......................................................................................................9-2
9 .3
IF Audio Board................................................................................................9-2
9.4
VCO Board ......................................................................................................9-2
9 .5
RF Board Assembly ........................................................................................ 9-3
10 FIGURES.................................................................................................................10-1
Page: -ii
Copyright ©1996 Glenayre
Print Date: 12/05/96