HP 70000 series - Page 313

User
Application
Errors
0001
{
0999
0027
Res BW-amplitude
Cause: The amplitude variation between the resolution bandwidths of the HP 70902A
IF section is too large.
Cure: The bandwidth lter adjustments in the HP 70902A IF section should be performed. If
this
does
not
remedy
the
problem,
repair
the
HP
70902A
IF section LC or crystal bandwidth
lters
.
0028
Calibration atten
Cause: The calibration attenuator of the HP 70902A IF section is not functioning correctly.
Cure: The calibration attenuators in the HP 70902A IF section require adjustment or repair.
0029
Log amplifier
Cause:
The
log
amplier
of
the
HP 70902A IF section is not functioning correctly.
Cure:
P
erform
the
HP
70902A IF section log amplier adjustment. If this does not remedy the
problem,
refer
to
the
HP
70902A IF section Service Manual for procedures to repair the log
amplier or replace the thick-lm log amplier microcircuits.
*0030
21.4MHz input cable
Cause: The program cannot nd the rear panel 21.4 MHz input signal for the HP 70903A
IF section.
Cure: Check the 21.4 MHz OUT connection on the rear panel of the RF section going to
the 21.4 MHz IN connection on the rear panel of the HP 70903A IF section. If this cable is
connected properly, it might be defective.
*0031
Video output cable
Cause: The rear panel VIDEO OUT signal of the HP 70903A IF section is not getting to the
HP 70900B local oscillator source VIDEO input.
Cure: Check the rear panel VIDEO OUT connection on the HP 70903A IF section. Be sure it is
routed properly to the HP 70900B local oscillator source and the cable is not defective
.
0032
LC board
Cause: The HP 70903A IF section LC board signal amplitude is too low.
Cure: Perform the HP 70903A IF section LC lter adjustments or the HP 70903A IF section step
gain adjustment. If these do not remedy the problem, the A1 LC lter assembly requires repair.
6-6 Error Messages