CRS FIRST AND SECOND IF AMP A3400/CRS THIRD IF AMP AND LIMITER A3500.

TM 11-5820-401-34-3/0967-LP-432-3060

CRS FIRST AND SECOND IF AMP A3400/CRS THIRD IF AMP AND LIMITER A3500.

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EL4G0194

An intermediate frequency from the second mixer is applied to the first if amplifier. The intermediate

frequency is approximately 5.65 MHz for all front panel KC control settings which are even, such as

30.00, 30.10, 30.20, etc. An if of approximately 5.60 MHz is applied to the first if amplifier for all odd

KC control settings, such as 30.05, 30.15, 30.25, etc. The if inputs are given as approximations because

they vary in response to the local oscillator's frequency error.

Further amplification is provided by the second if amplifier, after which the signal is passed through

Filter FL3004. The filter's band pass is narrow, and, therefore, causes attenuation of any frequencies

other than the if which might pass through the A3400.

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