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Performance Tests
PDH Transmit/Receive Jitter Amplitude Accuracy
PDH Transmit/Receive Jitter Amplitude Accuracy
Specifications
Please refer to the PDH Tx/Rx Jitter Specifications given in the Specifications
document provided.
Description
The HP 37718A Transmitter Unbalanced PDH Output is looped to the PDH Input
and the signal is also monitored on the Spectrum Analyzer. The HP 37718A Jitter
modulation frequency is set to a Jitter Amplitude/Frequency check point for the
selected Bit Rate and the Spectrum Analyzer set to observe the displayed spectrum
centered at this bit rate. The HP 37718A jitter Modulation amplitude is adjusted to
the level at which a Bessel Null is expected, then fine-tuned to null the carrier. The
jitter Amplitude (UI pk-pk) displayed on the HP 37718A Transmitter and Receiver
are checked to ensure they meet specified limits. The test is repeated for various
Jitter Amplitude/Frequency points for each Bit Rate.
Equipment Required
Spectrum Analyzer : HP 8560E
Oscilloscope : HP 54520A
75Ω/50Ω Matching Pad : HP 11825B
75Ω Power Splitter : SUHNER 4901.02A
Synthesizer : HP 3335B Opt 001
75Ω Termination : HP 15522-80010
Blocking Capacitor : HP 10240B
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