Shift Manual; Shift Free Run; Shift Ext - HP 8340B Manual

SHIFT MANUAL
(HP-IB:
SHS3)
If,
during normal operation, the amber FAULT annunciator appears
in the
ENTRY DISPLAY:
1.
Press
[SHIFT] [MANUAL]
to
initiate
the FAULT diagnostic routine
FAULT CAL KICK ADC PEAK TRK appears
in
the
ENTRY
DISPLAY.
A
flashing cursor indicates the faulty instrument area:
CAL
calibration constants
KICK
kick sweep end points
ADC
analog-to-digital converter
PEAK power peaking
TRK
tracking
Refer to
Figure A-4.
SHIFT FREE RUN (HP-IB: SHT1)
1.
To
activate the display self
test diagnostic
function, press:
[SHIFT] [FREE RUN]
This causes every segment of every LED
in the displays to
light,
followed by
a
marching pattern
of
every character
in the display.
SHIFT EXT
(HP-IB:
SHT3)
If
the red
UNLK
annunciator appears
in
the ENTRY DISPLAY:
1.
Press
[SHIFT] [EXT]
to activate the oscillator diagnostic function.
OSC: REF M/N HET YO N2 N1
appears
in
the
ENTRY DISPLAY.
The flashing cursor
indicates which oscillator circuit
is
causing the unlocked condition.
HP 8340B/41B
Assembly-Level Service Front Panel Diagnostics A-27