Instrument Function
R&S
®
SMU200A
184Operating Manual 1007.9845.32 ─ 15
"Auto"
Continuous measurement of bit error rate.
If either or both of the termination criteria are met, the measurement in
progress is terminated and immediately a new one is started automati-
cally. Depending on the settings made, a measurement may take con-
siderable time. During the first measurement, intermediate results are
displayed. For the measurements that follow, only the final results are
shown. The parameters "Data Bits" and "Errors" are continuously upda-
ted and indicate the relative values for the measurement in progress.
To start a continuous measurement, use the command :BERT:STARt
on page 521. To stop a measurement, use the com-
mand :BERT:STOP on page 521.
"Single"
Single measurement of bit error rate. The measurement is started by
clicking the "Execute Single" button.
If a measurement is in progress, the current values for "Bit Error Rate",
"Errors" and "Data Bits" are cyclically displayed. The measurement is
terminated when either or both of the termination criteria have been
reached.
To start a new measurement, the "Execute Single" button must be clicked
again.
SCPI command:
:BERT:SEQuence on page 516
Max Data Bits
Enter the number of transmitted data bits to be checked before the measurement is ter-
minated.
This criterion terminates the BER measurement after the specified number of data bits,
even if very few errors or none at all have been detected. With a low number of bit errors,
the measurement result may be statistically unreliable.
If the measurement is terminated because the number of data bits entered here was
checked, "Number of Data Bits" appears to the right of "Terminated By".
Data excluded from the measurement by "Data Enable" or "Pattern Ignore" is not counted.
SCPI command:
:BERT:SETup:MCOunt on page 519
Max Errors
Enter the number of bit errors to occur before the measurement is terminated.
This criterion terminates the measurement relatively quickly if the error rate is high. The
measurement result is statistically reliable, since many errors were already counted.
If the measurement is terminated because the number of bit errors entered here was
reached, Number of Errors appears to the right of Terminated By.
SCPI command:
:BERT:SETup:MERRor on page 519
PRBS
Selects the PRBS sequence. The data generated by the PRBS generator is used as a
reference for the measurement.
Bit and Block Error Rate Measurements - BERT Block
To Next Page
Loading...
