Error messages and troubleshooting
R&S
®
ZNB/ZNBT
1529
User Manual 1173.9163.02 ─ 62
9.1.1
Asynchronous errors
Asynchronous errors can occur at any time while the analyzer is operating. The ana-
lyzer is checked periodically for asynchronous errors. Many of these errors also cause
an entry in the status reporting system.
Error
Description
Remedy
Bit no.*)
Instrument tempera-
ture is too high
The analyzer detects that the instrument tempera-
ture is too high. After three warnings, the analyzer
is shut down.
Reduce ambient temperature, keep
ventilation holes of the casing unob-
structed.
7
Receiver overload
protection tripped
The analyzer detects an excessive input level at
one of the ports.
If this condition persists, all internal and external
generators are switched off ("RF Off").
Reduce RF input level at the port.
Check amplifiers in the external test
setup.
3
Reference frequency
lock failure
With external reference signal (System – External
Reference active) or internal high precision clock,
the reference oscillator is phase locked to a 10
MHz signal. The message appears when this
phase locked loop (PLL) fails.
For external reference: check fre-
quency and level of the supplied ref-
erence signal.
1
Converter clock fre-
quency lock failure
The clock generator for the AD converter clock is
phase locked to the reference oscillator. The mes-
sage appears when this PLL fails.
–
–
OCXO cold
With OCXO option R&S
ZNB/ZNBT-B4, the oven
temperature is too low.
Wait until the oven has been heated
up
8
Internal communica-
tion error
A severe unexpected disturbance was observed
(e.g. due to
).
The firmware resets all hardware components to
ensure proper instrument functioning and restores
the user settings to the state before the event.
Finally, it indicates the foregone hardware reset by
an information popup "Hardware communication
problem detected. Hardware was reset. Measure-
ment data of this sweep may be incorrect. Please
contact Rohde & Schwarz if this problem persists."
If this error is raised repeatedly,
please contact Rohde & Schwarz
service.
6
"STATus:QUEStionable:INTegrity:HARDware"
register are set when the error occurs.
9.1.2
Errors during measurement
The following errors are due to inadmissible hardware settings and states during the
measurement process. Some of the errors also cause an entry in the status reporting
system.
Errors during firmware operation
