17. Signal ID Oscillator Adjustment

17. Signal ID Oscillator Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

There is no related performance test for this adjustment procedure.

Description

The frequency range of the 298 MHz Signal ID Oscillator is determined by counting the

10.7MHz IF as A15C629 is rotated through its range of adjustment. The Signal ID Oscillator is then set to the frequency determined by the following equation:

Oscillator frequency range

Oscillator frequency = 298 MHz -

4 >

FREQUENCY

COUNTER

S I G N A L

ANALYZER

Al4

FREOUENCY

SPECTRUM PC

ANALYZER ,’ BOARDPROP I

 

 

Al5

RF

\\ A15J601

ADAPTER

1TEST CABLE

 

 

Y

 

 

+

 

SK1 19

 

TEE

 

Figure 2-20. Signal ID Oscillator Adjustment Setup

Equipment

Microwave Frequency Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 5343A Spectrum Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8566A/B

Adapters

Type N (m) to BNC (f) (2 required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1250-1476 BNC Tee (f,m,f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1250-0781

Adjustment Procedures 2-63