Heathkit HW-100 - Y.2.Avc and S Meter Calibration

y.2. AVC and “S” Meter Calibration
Using the same setup as used for measuring SNR, you can also measure AVC and “S”
meter readings. With the signal peaked, vary the attenuator to identify the “S3”, “S6”,
and “S9” values for each band. Traditionally, “S9” is taken as 50 uv (-73dBm) although
actual values can vary widely from radio to radio.
Freq => 3,700 7,200 14,200 21,200 28,700
S3 Input dBm
 volts
AVC Voltage
S6 Input dBm
 volts
AVC Voltage
S9 Input dBm
 volts
AVC Voltage
S9+20 Input dBm
 volts
AVC Voltage
Table 8. "S" Meter Calibration
Heathkit “S” Meter Circuit Page 63