CRS BALANCED MIXER A3200. - TM-11-5820-670-300020

TM 11-5820-670-30

1-15. CRS BALANACED MIXER A3200.

The balanced mixer accepts inputs from the following two sources:

EL1AT090

Local oscillator through high-pass filter FL3002

Harmonic generator

Local oscillator signals are applied to the mixer through a buffer amplifier to prevent loading down the

local oscillator. Twelve frequencies, 1 to 12 MHz, are applied to the mixer with the local oscillator's

output. The signals are heterodyned to produce four strong mixed output frequencies.

BALANCED MIXER OPERATING EXAMPLE

Assume the radio is tuned to 30 MHz, in which case the local oscillator runs to 41.50 MHz. The 41.50

MHz frequency is mixed with 12 signals generated by the harmonic generator, producing a mixed

output containing each of the 12 harmonics, local oscillator frequency, and sum and difference

frequencies listed below:

LOCAL OSCILLATOR

HARMONIC GENERATOR

DIFFERENCE

SUM

FREQUENCY

41.50 MHz

40.50 MHz

42.50

MHz

1 MHz

39.50 MHz

43.50

MHz

41.50 MHz

2 MHz

41.50 MHz

44.50

MHz

3 MHz

38.50 MHz

45.50

MHz

41.50 MHz

4 MHz

37.50 MHz

41.50 MHz

46.50

MHz

36.50 MHz

5 MHz

41.50 MHz

47.50

MHz

35.50 MHz

6 MHz

41.50 MHz

34.50 MHz

48.50

MHz

7 MHz

49.50

MHz

41.50 MHz

33.50 MHz

8 MHz

41.50 MHz

50.50

MHz

9 MHz

32.50 MHz

41.50 MHz

10 MHz

51.50

MHz

31.50 MHz

41.50 MHz

11 MHz

52.50

MHz

30.50 MHz

12 MHZ

41.50 MHz

53.50

MHz

29.50 MHz

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