AMX TXC16 Plus Specifications download pdf (Page 152)

SG-2000 MANUAL 145

The SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA

23.0 SG-2000 Factory Test Procedures

This section details the bench tests the SG-2000 goes through before it is

shipped out to the customer. It is included here for our more electronically-minded

customers who might want to do their own troubleshooting at the board level. It is

highly recommended, however, that any SG-2000 with board-level problems be sent

back to SGC Inc or to an authorized dealer for repair.

For testing purposes the SG-2000 is broken down to four subassemblies:

Exciter, LPA, Head and Main CPU (treated as one), and the Display subassembly.

23.1 Exciter Testing ProceduresThis section contains the

required documentation for testing and trouble-shooting the Exciter subassembly.

23.1.1 Required Testing Equipment

S/N Meter

Frequency Counter

RF in line voltmeter

RF Signal Generator

Audio Signal Generator

Power Supply Capable of at 35 Amps at 13.6 Volts

Connection Extension Cables

Exciter-LPA ribbon cable

CPU-Exciter ribbon cable

Spectrum Analyzer

Sweep Generator

Digital Multimeter

SG-2000 Head

SG-2000 Chassis with LPA

SG-2000 Main CPU

Oscilloscope

Bird RF thruline power meter with 250 W slug capable of reading in

the 1.6-30 MHz range.

23.1.2 Circuit Description

The Voltage Controlled Oscillator.(VCO sections are composed of a pro-

grammable Phase Lock Loop (PLL ) and an oscillator section. (Sheet 6 of 6 of

drawing J30100920 is the PLL section.) The processor board communicates

with this area to program frequencies for mixing. The communications link

between the processor board and the PLL is on sheet 5 of 6. Sheet 5 of 6 shows

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AMX TXC16 Plus Specifications Page 152