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Making Measurements
Measuring Jitter
Measuring Jitter
Description:
Jitter and error measurements are made simultaneously when a jitter option is fitted.
Option 200 is
Jitter measurements are also available when ATM is selected as a payload.
required for Jitter
Cumulative and Short Term results of Jitter Amplitude and Jitter Hits are provided
measurements.
on the
Graph and Text results for Jitter Transfer and Jitter Tolerance are also provided.
Jitter
LP, HP1 and HP2 filters to ITU-T O.171 (PDH) and O.172 (SDH).
Measurement
Filters
Please note that the instrument measurement bandwidth varies depending on the
Receiver Range selected (i.e. the bandwidth is reduced when not on the 1.6 UI
range). If you change the Receiver Range selection check the Filter Values displayed
at the bottom right of the display meet you measurement requirements.
rms jitter measurements settling time
If you select a PDH/DSn receiver interface and choose a O.172 /GR-499 Filter on
the Receiver Input, Jitter page, please allow approximately 20 seconds settling time
before performing a measurement.
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display.
JITTER
RESULTS
Bit Rate
HP1 (Hz) HP2 (kHz) LP (kHz)
(kb/s)
1.544
10
2048
20
8448
20
34368
100
44736
10
51840
100
139264
200
155520
500
622080
1000
2488320
5000
HP rms
(kHz)
8
40
12
18
100
12
80
400
12
10
800
12
30
400
12
20
400
12
20
3500
12
65
1300
12
250
5000
12
1000
20000
12
129
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