Instrument Function
R&S
®
SMBV100A
192Operating Manual 1176.8016.02 ─ 17
Pattern Ignore............................................................................................................. 195
Threshold.................................................................................................................... 195
Impedance.................................................................................................................. 195
Timeout....................................................................................................................... 196
Connectors..................................................................................................................196
Mode
Selects the type of measurement.
"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 auto-
matically. Depending on the settings, a measurement can take con-
siderable time. During the first measurement, intermediate results are
displayed. For the following measurements, only the final results are
shown. The parameters "Data Bits" and "Errors" are continuously
updated and indicate the relative values for the measurement in pro-
gress.
To start a continuous measurement, use the command :BERT:
STARt on page 542. To stop a measurement, use the command :
BERT:STOP on page 543.
"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 measure-
ment 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.
Remote command:
:BERT:SEQuence on page 536
Max Data Bits
Sets 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 few errors or none at all have been detected. With a low number of bit errors,
the measurement result can be statistically unreliable.
If the measurement is terminated due to the set number of max data bits 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 coun-
ted.
Remote command:
:BERT:SETup:MCOunt on page 540
Max Errors
Sets the number of bit errors to occur before the measurement is terminated.
Bit and Block Error Rate Measurements
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