3-118
Performance Tests
SDH Transmit/Receive Jitter Amplitude Accuracy
3 Select TRANSMITTER
OUTPUTSETTINGS
and setup the display as shown
opposite.
4 Select RECEIVER
INPUT SETTINGS
and setup the
display as shown
opposite.
5 Set the Calibration Pattern to ALT.
6 Set the Spectrum Analyzer as follows:
Centre Frequency - 77.76 MHz (half bit rate being tested)
Frequency Span - 30 kHz (approx 3 times the Jitter frequency)
Reference Level - approx -15dBm
Sweep Time - Auto
Video Bandwidth - Auto
Resolution Bandwidth - Auto
7 Set the Synthesizer to Frequency 10 kHz and minimum Output level.
8 Increase the Synthesizer output level until the Carrier and first sidebands are
equal as observed on the Spectrum Analyzer (see Figure 3-11).
JITTER
JITTER
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