Tektronix CTS 850, User Manual

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Setting Jitter/Wander Parameters
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CTS850 SDH/PDH Test Set User Manual
Jitter Tolerance Test.
Follow these additional steps to set up a jitter
tolerance test.
1. Set the Test Type to Jitter Tolerance and set the mask type as
appropriate. The available masks depend on the rate, as shown in
the table below.
Rate Available Masks
2 Mbit/s G.823 (Standard), G.823 (National)
34 Mbit/s G.823
45 Mbit/s * G.824
140 Mbit/s G.823
STM–0 GR–253
STM–1 G.825, G.958 (Type A), G.958 (Type B)
STM–4 G.825, G.958 (Type A), G.958 (Type B)
* If your CTS 850 test set supports the 45 Mb/s option.
The CTS850 modulates the transmitted line or clock frequency with
sinusoidal jitter. The jitter generator begins at the start frequency and
stops at the end frequency.
2. To set the start frequency for the jitter generator:
Press Menu
Button Select Menu
Page Highlight
Parameter
Select Choice
TEST SETUPS JITTER TESTS Start Frequency as appropriate