R&S AFQ100A
Bit Error Rate Measurements - BERT Block
1401.3084.32 4.73
E-3
No Clock
The applied clock signal was not detected.
Possible causes are:
- Clock recovery is not available (e.g. with tests
of RF components).
- A marker signal can be used as a clock. As the
DUT causes a delay, the ratio of clock-to-data
travel times must always be taken into account
and checked with an oscilloscope if necessary.
- The wrong impedance for the applied clock rate
was selected (see Impedance parameter).
- The wrong threshold for the applied clock signal
was selected (see Thres
hold
parameter).
Data
The applied data signal was detected.
Remote-control command:
BERT:RES?
Response (the 6th value indicates the status of the
data line: 1 = active, 0 = not active):
"1000,5,5E-4,1,1,
1
,1"
No Data
The applied data signal was not detected.
Only clocked-in signals are detected; if the clock
signal is missing, then data changes will also not
be detected.
If the data is not detected despite the detected
clock signal, this may be caused by the following:
- The signal from the DUT is missing.
- The wrong impedance for the applied clock rate
was selected (see
Impedance
parameter).
- The wrong threshold for the applied data signal
was selected (see
Threshold
parameter).
Sync
The measurement is synchronized.
Remote-control command:
BERT:RES?
Response (the 7th value indicates the status of the
synchronization: 1 = successful, 0 = unsuccessful):
"1000,5,5E-4,1,1,1,
1
"
