Instrument Function
R&S
®
SMU200A
182Operating Manual 1007.9845.32 ─ 15
"No Clock"
The applied clock signal was not detected. Possible causes are:
●
Clock recovery is not available (e.g. with tests of RF components).
If the signal is generated using the R&S Signal Generator, the bit
clock can be extracted from the CLOCK output connector (only with
"Custom Dig Mod" signals in realtime). If signals complying with other
digital standards are generated or if ARB waveforms are used, 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
"Threshold").
"Data"
The applied data signal was detected.
"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.
Bit and Block Error Rate Measurements - BERT Block
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