Remote control
R&S
®
ZNA
875
User Manual 1178.6462.02 ─ 20
Bit No.
Meaning
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.
14
Power settings exceed hardware limits
This bit is set if the source power at one of the test ports is too high or too low.
Reduce or increase the source power.
15
Detector MEAS time has been internally limited
This bit is set if the selected measurement time for a detector (observation time) is too
long.
If desired, reduce the measurement time or select a smaller IF bandwidth.
6.5.4
Application of the status reporting system
The purpose of the status reporting system is to monitor the status of one or several
devices in a measuring system. To do this and react appropriately, the controller must
receive and evaluate the information of all devices. The following standard methods
described in the following sections are used:
●
Service request (SRQ) initiated by the measuring device
●
Serial poll of all devices in the bus system, initiated by the controller to find out who
sent an SRQ and why
●
Parallel poll of all devices
●
Query of a specific instrument status by commands
●
Query of the error queue
Status reporting system
