HP 8340b - Page 191

YO
UNLOCK-SWEPT
MODE
i)
IS
CW/MANUAL
MODE OK?
2)
IS
VSWP OK?
(0V)
3)
IS
THE
YO
KICK
PULSE ON
THE ASS
YO
DRIVER
OK?
4)
IS
HLEY
HIGH
AT START
OF
SWEEP?
REFER TO YO
UNLK CW/MANUAL
TROUBLESHOOTING
SYSTEM
ASS
SWEEP
GENERATOR
AS9
DIGITAL
INTERFACE
IS LKICK
ON
THE
ASS
YO
DRIVER?
ASS
YO
DRIVER
IS
LKICK
ON
AS4 TP2?
A62
MOTHERBOARD
OR
XAS4/XASS
CONNECTORS
AS4
YO
PRETUNE/
DELAY
COMPENSATION
Figure
D-5.
YO
Loop Troubleshooting
Flowchart
(2
of
2)
HP
8340B/41B
YO
Loop Assembly-Level Troubleshooting
D-23