HP 8642A Operating Manual page 609

NTEGflATOA
s.
I ACQUISITION SIGNAL 5ENSE
BEAT NOTE SENSE .
LOOP L I M I T I N G AND
I S O L A T I N G A M P L I F I E R S
-<y
LOOP IF
SENSE
LOW-PASS F I L T E R S
SAWfl LOOP
D I A G N O S T I C S
UHF REFERENCE LOOP I F
TUNE VOLTAGE SENSE (SS)
SAKfl LOOP DIAGNOSTIC BUS
11