HP 3562A Service Manual page 389

FAU LT I SO LAT I O N
Test
L ocation
A1 TP4
A1 TP8
A1 J 703-1
A4 TP8
A4 TP24
Refer to step 5 for key presses to view CNTC L K .
A 1 T P1 1
'
Press A2 5 1 to view the STIM@ waveform (ST I M @ is
disabled when calibration is done).
A30 TP8
5 . Press the H P 3562A keys as fol lows:
SPC L FCTN .
1 . Press t h e H P 3562A keys a s fo l lows:
SPCL
. . . . . . S E RV I C
FCTN
2. I f this test fails, start trou b l eshooting with the A4 Local Osc i l l ator (go to 8-8).
3. If this test passes, the A4 Local Osc i l l ato r is probably work i n g correctly.
7-26
Table 7-7 Front End Signal Check
Signal Waveform
Name Number
1 0.24 M H z #2
SAMP
#5
D R E Q L #5
SYNC2 #6
cos
#6
C NTCLK #4
ST I M @ #8
S E RV I C
. . .
T E ST
LOO P
O N
T E ST
S O U R C E
T E ST . . . . . . T E ST
S O U R C E
Probable Cause
of Failure
A31 Trigger
A34 ADC 2
AS Digital Fi lter
A6 D F L TR CaNT
AS D igital Fi lter
A6 D FL TR CaNT
A4 La
A4 La
A1 Digital Sou rce
A30 Analog Sou rce
FR E N D
i NTFCE
LO
F U N CTN
MO D E L 3562A
Go To
8-1 8
8-1 9
8-9
7-8,
part G
8-8
8-5
8-1 7