HP 8340B Manual 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