HP 70000 series - Front-Panel Indicator Explanations

HP-MSIB
if the HP-MSIB indicator (called I/O CHECK on some models)
turns on, inspect all module interconnections for tightness and
then cycle power. If the HP-MSIB indicator remains on, consult
the HP 70000 Modular Spectrum Analyzer Installation and
Verication Manual .
Status Denotes the active or error state. The active (ACT) indicator lights
whenever analyzer functions are accessed by pressing the 4
USER
5
or 4
MENU
5 key. The error (ERR) indicator lights when the analyzer
has sensed an error in that module.To learn the nature of the
error and its source, press 4
DISPLAY
5 , 4
REPORT ERRORS
5 , which lists
the error code and the module where the error originated. (See
Appendix C for error code denitions.) Press 4
MENU
5 to return to
the normal instrument display.
The display also has active and error indicators,an A and E that
appear in the upper-left corner (or lower-right corner on some
models) of the display. The active indicator lights when the
4
DISPLAY
5 key is pressed. The error indicator lights when an error is
sensed
by the display module.
HP-IB
describes
the
remote-control status of the analyzer. When power
is
applied,
the
analyzer is in local control and the indicators
are
o.
If the analyzer is addressed by a computer, the remote
indicator
lights
and the listen, talk, or service-request indicator
lights depending on the computer instructions. The listen indicator
lights when the analyzer has received instructions or data from the
computer. The talk indicator lights when the analyzer has sent
data or instructions to the computer. The service-request indicator
lights when the analyzer has requested computer service.
Instrument
state
describes
the
instrument
operating
state
.
The
MEASURE
indicator
lights
as
the
analyzer
sweeps
each
frequency
band
and
blanks
during
retrace
and
between
frequency
bands
.
The
SELF
TEST
indicator
lights
whenever
the
analyzer
is
testing
itself.
The
LOOP
UNLOCK indicators usually light when a hardware failure occurs.
If any of these indicators are lit, check all module interconnections
for tightness, then cycle power. If the indicators remains lit, refer
to the troubleshooting instructions in the HP 70000 Modular
Spectrum Analyzer Installation and Verication Manual .
1-22 Overview