HP 8559A Operation And Service Manual page 402

MODEL 8559A
A12 STEP G A I N
0- 12 dB CONTROL
REF LEVEL W P
REF LEVEL CY
2ND
20 dB 20 dB
10 dB
AMPLIFIER AMPLIFIER AMPLIFIER
2 1 . 4
I F 6 2
BAND
SELECT
DECODER
12.1- 21
FIGURE STEP GAIN ASSEMBLY AIL, BLOCK DIAGRAM
1
FLATNESS
MIXER DIODE BIAS
DIODE BIAS
SERVICE