Pdh Internal Transmitter Clocks (Options Ukk, [Usb], Ukj, [Usa]); Specifications; Description; Equipment Required - HP 37717C Calibration Manual

Performance Tests

PDH Internal Transmitter Clocks (Options UKK, [USB], UKJ, [USA])

PDH Internal Transmitter Clocks (Options UKK, [USB],
UKJ, [USA])
Specifications
Bit Rate
139.264 MHz UKJ, [USA], UKK, [USB]
34.368 MHz UKJ, [USA], UKK, [USB]
8.448 MHz UKJ, [USA], UKK, [USB]
2.048 MHz UKJ, [USA], UKK, [USB]
704 kHz UKK, [USB]

Description

This test verifies that the PDH transmit data rates are within limits. These limits
assume the instrument is within the annual calibration cycle. The Frequency Offset
capability (deviation from Standard Bit Rate) is also tested here.
The test uses a Frequency Counter connected to the PDH Signal Out port to measure
the data rate on an "all ones" pattern. This gives an indirect measure of the internal
transmitter clock frequency as the data is clocked by the internal clock oscillator.
Because the Frequency Counter triggers from the positive pulses only, the frequency
count will be half the selected data rate.

Equipment Required

Frequency Counter
75 Termination
T Connector
3-6
Option
: HP 5335A Option 010
: HP 15522-80010
: HP 1250-0781
Specification
139.264 MHz 626.28 Hz
34.368 MHz 154.66 Hz
8.448 MHz 38.0 Hz
2.048 MHz 9.22 Hz
704 kHz 3.17 Hz