PXIe Platform Bit Error Rate Tester
|
BERTPXIe-1003/1005
Coherent Solutions Ltd.
Version
1.00
38
whereas a traditional equivalent-time sampling scope only takes one sample per trigger, which
means that it really is only sampling for a very small fraction of the time. Therefore, for error
rates that are very low, the BERT method of the eye pattern testing is much more precise in
telling you where the thresholds in the contour are.
8.3.8.1
Configure eye scan settings
To configure the eye scan settings, click the EYE tab on the left of the page. The following
options are displayed:
For eye scan, you can configure the vertical resolution, the horizontal resolution, and the
pattern length:
•
Vertical resolution: The voltage step-size that is used as the vertical resolution of the
eye diagram. To specify the vertical resolution, select an appropriate value from the
VERTICAL RES. drop-down list.
•
Horizontal resolution: The phase step-size that is used as the horizontal resolution of
the eye diagram. To specify the horizontal resolution, select an appropriate value from
the HORIZ. RES. drop-down list.
•
Pattern length: Resolution of the eye scan colour. To specify the pattern length, select
an appropriate value from the PATTERN LENGTH drop-down list. The number of
values in the list is model specific.
8.3.8.2
Start/stop eye scan
You can start or stop the eye scan for a channel at any time.
To start the eye scan 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 eye scan for all channels, use the START or
STOP button for all channels, as shown below:
