Rohde & Schwarz SMU200A - Page 213

Instrument Function
R&S
®
SMU200A
193Operating Manual 1007.9845.32 ─ 15
Data Polarity
Sets the polarity of the feedback data blocks.
SCPI command:
:BLER:SETup:DATA[:POLarity] on page 517
Clock Slope
Sets the polarity of the active slope of the feedback clock.
SCPI command:
:BLER:SETup:CLOCk[:POLarity] on page 516
Impedance
Sets the input impedance of the BERT inputs "Clock", "Data", "Data Enable" and
"Restart".
For high clock rates, 50 Ohms should be selected.
SCPI command:
[:SOURce]:INPut:BERT:IMPedance on page 522
Threshold
Sets high/low threshold in volts for the BERT inputs "Clock", "Data", "Data Enable" and
"Restart".
The variable threshold makes it possible to align the BERT interface with the level of
different signals. In addition, reflections and other interference can be suppressed by
selecting the appropriate threshold.
SCPI command:
[:SOURce]:INPut:BERT:THReshold on page 522
Data Enable
Sets the polarity of the "Data Enable" signal.
The "Data Enable" signal marks the user data of the signal.
The signal is generated by the DUT and fed in at the "Data Enable" input of the BERT
interface.
"High"
If the "Data Enable" signal is at a high level, the data bits at the BERT
data input are interpreted as user data. During a low level of the "Data
Enable" signal, they are interpreted as checksum bits.
"Low"
If the "Data Enable" signal is at a low level, the data bits at the BERT
data input are interpreted as user data. During a high level of the "Data
Enable" signal, they are interpreted as checksum bits.
SCPI command:
:BLER:SETup:DENable on page 517
Bit and Block Error Rate Measurements - BERT Block