SMIQ
Bit Error Rate Test
1125.5555.03
2.371
E-9
PRBS
Setting the period length of data: 9, 11, 15, 16, 20, 21, 23 bits.
Note:
Data inversion for PRBS15 and PRBS23, which is contained in the
standard, is performed automatically when the PRBS is selected.
DATA POLARITY remains unaffected.
IEC/IEEE-bus command
:BERT:SET:TYPE PRBS9
DATA POLARITY
Setting the data bit polarity.
NORM
Normal polarity
INV
Inverted polarity
IEC/IEEE-bus command
:BERT:SET:DATA NORM
CLOCK SLOPE
Setting the clock edge polarity.
POS
Rising edge
NEG
Falling edge
IEC/IEEE-bus command
:BERT:SET:CLOC RIS
EXTERNAL RESTART
Activating/deactivating an external restart of the BER measurement.
Note:
An enabled RESTART works always independently of PATTERN
IGNORE or DATA ENABLE.
DISABLED
Deactivated
ENABLED
Activated
IEC/IEEE-bus command
:BERT:SET:REST INT
DATA ENABLE
Setting the polarity of the DUT's DATA ENABLE signal.
Note:
If the data are not enabled, the execution of the BER
measurement is stopped completely. The identification circuit
for PATTERN IGNORE as well as the PRBS generator of the
BER measurement wait as long as data are not enabled. If the
data are enabled, the measurement is continued.
NOT USED
Irrespective of the data enable signal applied, all data at the
BERT data input are used for the BER measurement.
LOW
Only the data applied at the BERT data input with a low-level
data enable signal are used for the BER measurement.
HIGH
Only the data applied at the BERT data input with a high-level
data enable signal are used for the BER measurement.
IEC/IEEE-bus command
:BERT:SET:DEN OFF
