3-94
Performance Tests
PDH Transmit/Receive Jitter Amplitude Accuracy
NOTE The Bit Rates available are dependent on the HP 37718A option.
13 Press STOP to stop measurement.
14 Check the Jitter accuracy for each value in Table 3-4. In each case, set the HP
37718A Rate and Spectrum Analyzer Center Frequency to the value given in
column 1 of the table (Set the HP 37718A PATTERN to ALL ONES and
JITTER AMPLITUDE to minimum after each change of Bit Rate).
Set the HP 37718A Jitter Modulation Frequency and Amplitude to the values
given in columns 2 and 3 of the table. Fine-tune the amplitude to obtain the lowest
carrier level on the Spectrum Analyzer display and check that the jitter amplitude
displayed on the HP 37718A TX settings & RX results are between the limits
given in columns 4 to 7 of Table 3-4.
Table 3-4 Tx/Rx Jitter Amplitude Accuracy, Ranges (1/1.6 UIp-p)
Bit Rate/
Center
Frequency
Modulation
Frequency
Nulled
Jitter
Amplitude
(UI)
Minimum
Jitter
(UI)
TX
Maximum
Jitter(UI)
TX
Minimum
Jitter (UI)
RX
Maximum
Jitter (UI)
RX
2048kHz 2400Hz 0.77 0.69 0.83 0.711 0.829
8448kHz 10700Hz 0.77 0.69 0.83 0.706 0.834
34368kHz 4000Hz 0.77 0.69 0.83 0.706 0.834
139264kHz 4000Hz 0.77 0.68 0.84 0.706 0.834
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