HP 8970B Service Manual page 38

Board Details
Figure 6-7: HP 8970B Option 20 Hardware
YTO
W2
Input
Section (A6)
Isolator
W5
4.5 GHz
LPF
Second
Convertor
6-8
W3
W4
Mixer
600 MHz
SAW Oscillator
HP 8970B Option 020 Service Manual Supplement