HP 8970B - Front End Overview

HP 8970B Option 020 Service Manual Supplement 1-3
Block Diagram and Parts List
Front End
Front End
Figure 1-2: HP 8970B Front End Schematic
10 dB
10 dB
10 dB
20 dB
2-7 GHz Isolator
4.5 GHz LPF
2nd Convertor
X 6
600 MHz
3.6 GHz
300 MHz
10 - 2047 MHz
2050 MHz LPF
INPUT ASSEMBLY
2 dB
Detector
Diode
Output
3.910 - 5.947 GHz
YTO Output
To A4 Assy
3.9 GHz
J3
J4
J5
J2
J1
Limiter
Limiter (on 08970-60125
Input Assembly only).
Suppresses externally
generated transients.