Specifications
5-9
Getting Started
Making Your First Measurement
Eye Edge Threshold
8. Set to , then select and select a
threshold using the numeric keypad. For example, to select a threshold of 1.00E−03;
enter 1.00 using the keypad, then press the softkey and enter 3 using the keypad,
then press .
9. Press the softkey. If clock-to-data alignment is successful, the
Status line at the center of the screen reads clock to data input delay aligned.
Automatic 0/1 Threshold Center
On data signals with an unequal mark-density perform an automatic 0/1 threshold center
operation as follows:
10.After performing the clock to data alignment select the softkey.
The Status line at the center of the screen will indicate 0/1 input threshold centering in
progress and 0/1 data input threshold centered when complete.
To Select a Measurement Gating Period
11.Press the hardkey. The gating mode currently selected is MANUAL, try
selecting a 20 second SINGLE gating period.
12.Press , then , use the numeric keypad
and softkey to select a 20 second gating period. Proceed to step 13, or read
the following note for alternative gating choices.
NOTE The instrument is currently set to gate by time; two other gating period
choices are also provided, they are: gate by errors and gate by bits. To
select either of these gating choices select the appropriate softkey.
To Start a Measurement
13.Press the hardkey. Note the illuminated Gating LED on the error
detector front panel and the Gate flag at the top right of the screen.
Viewing Results and Introducing Errors into the System
14.Since there were no errors introduced into the system there are no errors measured. To
introduce errors into the system and obtain a meaningful result proceed as follows:
15.Select the hardkey. The instrument offers you the choice of adding single
errors, errors at a fixed rate or errors from an external source. For this procedure select
a fixed rate of 1E−5. Proceed to step 16.
0/1 THR AUTOMAN AUTO EYE EDG THRSHLD
e
ENTER
CLK-DAT ALIGN
0/1 THR CENTER
gating
SINGLE GATE BY TIME GATING PERIOD
SECONDS
RUN GATING
error add