Chapter 4 E1 Testing
Measuring Jitter
SmartClass E1 Tester User’s Guide 43
9 To measure conformance to G.703 specifications, do the following:
a Press the asterisk [
*
] key to go to the Action menu.
b Select View Mask.
The pulse should fall between the maximum and minimum mask.
c To hide the mask, press the asterisk [
*
] key to go to the Action menu,
and then select Hide Mask.
10 To restart the test, press the asterisk [
*
] key to go to the Action menu, and
then do one of the following:
– Restart Capture. This captures the pulse in the current configuration.
If the configuration is Capture Positive Pulses, it will capture a positive
pulse; if the configuration is Capture Negative Pulses, it will capture
negative pulses.
– Capture Positive Pulses
– Capture Negative Pulses
For more information about pulse shape results, see “Pulse shape results” on
page 86.
You have completed pulse shape analysis.
Measuring Jitter
The jitter test is used to verify the integrity of circuits by qualifying the jitter char-
acteristics. The jitter option allows you to measure jitter manually or using auto-
matic sequences to measure Maximum Tolerable Jitter (MTJ), Fast MTJ, and
the Jitter Transfer Function (JTF).
This test involves three basic steps:
– Configuring test settings
– Connecting to the circuit
– Running the test
Configuring test settings
Before running any tests, you should configure the E1 Tester with the appro-
priate settings for the line under test.
To configure test settings
1 From the E1 Measurement menu, launch the E1 Jitter application.
2 From the E1 Jitter menu, select Configuration.
The Configuration menu appears.
NOTE:
Jitter is an optional feature. It only appears if you have purchased the Jitter
option. In addition, jitter requires newer hardware. To verify whether your
hardware is jitter capable, see “Viewing the software and hardware
information” on page 18.
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