Remote Control
R&S
®
ZNA
745
User Manual 1178.6462.02 ─ 12
Bit No.
Meaning
3
Receiver overload protection tripped
This bit is set if the analyzer detects an excessive input level at one of the ports. If this
condition persists, all internal and external generators are switched off.
Reduce RF input level at the port. Check amplifiers in the external test setup, then switch
on the internal source using
OUTPut ON
.
6
Internal communication error
This bit is set if an internal error caused the analyzer to perform an automatic hardware
reset. The current measurement results are possibly invalid.
The bit is automatically cleared at the beginning of the next sweep, no action is required.
7
Instrument temperature is too high
This bit is set if the analyzer detects that the instrument temperature is too high.
Reduce ambient temperature, keep ventilation holes of the casing unobstructed.
8
Oven cold
This bit is set if the oven for the internal high precision clock (option B4) is not at its operat-
ing temperature.
Wait until the oven has been heated up.
9
Unstable level control
This bit is set if the analyzer detects an excessive source level at one of the ports. The
signal is turned off and the sweep halted.
Check signal path for the received wave, especially check external components. Then
restart the sweep (
INITiate<Ch>[:IMMediate]
).
10
Problem concerning external generator
This bit is set if an external generator has been configured but cannot be controlled or pro-
vides error messages.
Check whether the generator is properly connected and switched on. Check the GPIB
address; exclude address conflicts when using several external generators or other equip-
ment.
11
Problem concerning external power meter
This bit is set if an external power meter has been configured but cannot be controlled or
provides error messages.
Check whether the power meter is properly connected and switched on. Check the GPIB
address; exclude address conflicts when using several external power meters or other
equipment.
12
Time grid too close
This bit is set if the sweep points for a time sweep are too close, so that the analyzer can-
not process the measurement data until the next sweep point starts.
Increase stop time, reduce no. of points, increase IF bandwidth. If possible reduce number
of partial measurements, e.g. by restricting the number of ports measured.
Status Reporting System
