SGC SG-2000 - Unpacking

SG-2000 MANUAL vi
The SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
©1995, SGC, Inc. TEL: (206) 746-6310 FAX: (206) 746-6384
21.0 Technical Reference..........................................................................................110
21.1 Squelch Scale Recalibration ......................................................110
21.2 SG-2000 Microprocessor Reset Procedure..............................110
21.3 Emergency Calling.....................................................................111
21.4 Basic Tune-up Procedure (Alignment) ...................................112
21.5 AM Filter Bypass........................................................................113
21.6 Oscillator and Filter Operation................................................113
21.7 Microprocessor Assembly ........................................................115
21.8 VCO's...........................................................................................115
21.9 PLL's.............................................................................................115
21.10 Serial Logic Switches .................................................................116
21.11 Tone Generator...........................................................................116
21.12 Oven Switch................................................................................116
21.13 Alarm Generator ........................................................................116
21.14 Master Oscillator with Oven ....................................................117
21.15 Crystal Oven...............................................................................117
21.16 Output Low Pass Filters............................................................118
21.17 Automatic Level Control ..........................................................118
21.18 Modulation Characteristics, AFR ............................................118
21.19 Modulation Characteristics, PEP Limiting.............................119
21.20 SG-2000 Performance Measurements .....................................121
22.0 Trouble Shooting ..............................................................................................127
22.1 Dysfunctions...............................................................................127
22.2 Scanning in One Direction Only..............................................128
23.0 Test Procedures..................................................................................................129
23.1 Exciter Testing Procedures .......................................................129
23.2 LPA Testing Procedures............................................................156
23.3 Display Section Testing Procedures........................................163
23.4 Head CPU and Main CPU Testing Procedures.....................171
23.5 Final Assembly Testing Procedures........................................178
24.0 Schematic Reference Section ..........................................................................180
INDEX .......................................................................................................................210
Appendix A, Frequency List .......................................................................................A-1