Kenwood TS-60S Service Manual page 9

CIRCUIT DESCRIPTION
Fig. 8 Squelch circuit
7. Signalstrength meter circuit
8.
AGC circuit
In all modes except FM, the signalstrength meter
The time constant for the signal envelope-detected
circuit comprises operational amplifier IC5. The signal,
by IC3 is changed in each mode by the analog switch.
level-detected by IC3, is input to IC5 11/21 and amplified
The effective value, not the peak value, is used in AM
by about 8 dB by IC5 (212).
mode. When SLOW is selected in SSB and CW
In FM mode, the level detection signal from IC2 is
modes, the analog switch is turned on. (Fig. 9)
adjusted by VR2, selected by IC4 (BU4066BF) accord-
ing to the mode, andoutput directly to the digital unit.
(Fig. 9)