Figure 2-6. 500-kHz fm oscillator circuit ,functional diagram.

TM 11-6625-467-34

Figure 2-6. 500-kHz fm oscillator circuit ,functional diagram.

2-11. 30 MHz Oscillator Signal Paths

output level. The oscillator circuit contains a level

detector circuit that samples the oscillator output

and produces a proportional dc output. CIRCUIT

The 30 megahertz oscillator produces a 30 mega-

SELECTOR B (position 1) connects the level detec-

hertz sine wave output. The oscillator output ap-

tor output to the dc voltmeter circuit for readout.

pears at the 30 MC jack on the front panel of the test

set. In position 3, CIRCUIT SELECTOR D connects

2-10. 5.925 MHz Oscillator Signal Paths

+27.5 volts dc to the HIGH FREQ AMPL control

w h i c h adjusts the oscillator output level. Either

The 5.925 megahertz oscillator produces a 5.925

CIRCUIT SELECTOR A or C connects the HIGH

megahertz sine wave output signal. The oscillator

FREQ AMPL control output to the 30 megahertz

ouput appears at the 5 MC jack on the test set front

oscillator. In position O, CIRCUIT SELECTOR A

panel. CIRCUIT SELECTOR D (position 9) connects

completes the path. In position 7, CIRCUIT SELEC-

+27.5 volts dc to the LOW FREQ AMPL control,

TOR C completes the path.

and CIRCUIT SELECTOR C (position 9) applies the

control output to the oscillator. The LOW FREQ

2-12. 68 MHz Oscillator Signal Paths

AMPL control adjusts the oscillator output level.

The oscillator circuit contains a level detector cir-

The 68 megahertz oscillator produces a 68 mega-

cuit that samples the 5.925 megahertz output and

hertz sine wave output signal. The oscillator output

produces a proportional dc output. CIRCUIT

appears at the 68 MC jack on the front panel of the

SELECTOR B (position 2) connects the level detec-

test set. In position 3, CIRCUIT SELECTOR D con-

tor output to the dc voltmeter circuit for readout.

2-7