PXIe Platform Bit Error Rate Tester
|
BERTPXIe-1003/1005
Coherent Solutions Ltd.
Version
1.00
35
that the PLL is not locked to the ED input pattern. In this case, you must check the
input pattern and force a re-sync to lock the PLL before attempting to start the BER
counter.
•
BER (bit error rate): Current BER of the incoming data pattern
•
ERROR: Number of error bits since the start of the ED counter
•
BITS: Number of incoming bits counted since the start of the ED counter
•
ELAPSED TIME: Elapsed time in seconds measured since the start of the error
detector counter
8.3.2
Start/stop error detection
You can start or stop the error detection for a channel at any time.
To start the error detection for a channel, click the START button (
) under the
corresponding channel section on the left side of the page. To stop it, click the STOP button
(
).
N
OTE
To start or stop the error detection for all channels, use the START or
STOP buttons for all channels, as shown below:
8.3.3
Specify the pattern of the input signal
The test pattern of the input signal can be PRBS7, PRBS9, PRBS10, PRBS11, PRBS15, PRBS23,
or PRBS31.
To specify the pattern to be used, select a pattern from the PATTERN drop-down list.
8.3.4
Invert the polarity of the test pattern
Based on your needs, the polarity of the test pattern can be inverted at the ED input level. The
inversion can only be done before error detection is started.
To invert the pattern, click the INVERT button (
). Once the inversion is in effect, the color
of the button changes to green (
), indicating the signal pattern is inverted.
