Chapter 3
Diphase Testing
Specifying data settings
Data Communications and Diphase Testing Manual
Page 26
21148872, Rev. 002
January 2016
Specifying data settings
After specifying the clock frequency, you specify the block length for the data, the
encoding scheme, and the duration of the interval between updates to interval based
results.
To specify the data settings
1
Select the
Setup
soft key, then select the
Data
setup tab.
2
Specify the following settings.
The data settings are specified.
Selecting a BER pattern
After you specify the clock frequency and data settings, you can select a BER pattern
for your test. When you select a pattern, you also specify sync loss criteria to control
the unit’s sensitivity in declaring loss of synchronization, and then indicate when the unit
should attempt to regain synchronization. A list of available patterns is provided in
For step by step instructions on specifying pattern settings, see
. If you want to define your own pattern, see
programmable patterns” on page 19
Performing BER analysis
Performing BER analysis of a Diphase circuit involves configuring the test, connecting
to the circuit, starting the test, inserting logic errors, and then viewing test results. The
scenario below provides the basic steps involved; you may need to configure additional
settings for your particular circuit.
Setting
Value
Block Length
Enter the number of bits that the instrument will
interpret as a block. The default is 1000 bits.
Encoding
Select
Manchester
or
Conditioned
.
Polarity
(Manchester only)
Select
Normal
or
Inverted
.
Duration for Interval Test
Results
Enter the duration of the interval between updates
to interval results, then select Seconds, Minutes,
Hours, Days, or dd/hh:mm:ss. Values will be
updated for the results at the end of each interval.
