HP 3562A Service Manual page 496

S E RV I C E
B. A4 Signature Analysis Tests
Use these tests to isolate a fai l u re on the LO assemb ly. O n l y the com ponents in fai l i ng
subblocks need to be tested. The symbol '(T)' refers to a signal conti nual ly changi ng between
TTL level high and TTL leve l low.
P ress the l in e switc h off.
1 .
2. Connect the S ignatu re A n a lyzer as fo l lows:
3 . Press the l i n e switch on.
4. S ignature Analysis Test -1 Setu p:
a. Press the keys as fol l ows:
SPCl
FCTN
8-46
Table A4-1 A4 Signature Analyzer Setup
Polarity
Signal
G round
Positive edge
C lock
Stop Negative edge
Start Positive edge
. . . . . . S E RV I C E
T E ST
Connection
A4 J 1 -1
A4 J 1 -3
A4 ) 1 -4
A4 ) 1 -5
. . . . . . LOOP
O N
. . . . . . T E ST
S O U RC E
MOD E L 3562A
L O DSA
PATT
1