HP 3562A Service Manual page 465

MOD E L 3562A
D . Effective Sample Rate Generator Test
Use tab le A1 -4 to verify the components in the effective sam ple rate generator. I n tab le
A 1-4, a 0 represents a TTL level low and a '1 ' represents a TTL leve l high. Set the freq uency
' '
span by p ress ing the H P 3562A keys as fol lows:
F R E Q
Frequency Span
If the fault has not been fou nd, go to part E .
E. Digital Source Signature Analysis Tests
Use these tests and the waveforms in part F to isolate a fai l u re on the d i g ital sou rce
assembly. O n ly the com ponents in the fai l i ng s u b b l ocks need to be tested.
1 . Press the l i ne switch off.
2 . Connect the Signature Analyzer a s fol lows:
1 -5
Table A OS Signature Analyzer Setup
Signal
G round
C l ock
Stop
Start
3.
Press the line switch on.
4. To start signature an alysis test #1 , press the H P 3562A keys as fol lows:
SPCL
FCTN
FREQ
S PAN
Table A I -4 Effective Sample Rate Generator Test
DA
(U1-3)
1 k H z 0
3 . 1 2 5 k H z
0
1 0 k H z 1
1 00 k H z
1
Polarity Connection
A1 J2-1
Positive edge A1 J2-3
Positive edge A1 J2-4
Positive edge A1 J 2-5
. . . . . . S E RV I C
T E ST
. . . . . . To freq uency span i n table
DB DSE l
(U101-2)
(U4-12)
0 1 25.6 k H z
1 1
0 1
0
1 5.1 2 M H z
. . . . . . LOO P
O N
. . . . . . T E ST
SOURC E
S E RV I C E
TP1 2
80.0 k H z
256 k H z
S O U R C E
MAI N
8-1 5