HP 37717C Calibration Manual
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Brand: HP
Category: Measuring Instruments , Test Equipment
Type: Calibration manual for HP 37717C
Pages: 399
3-27
Performance Tests
Multiple PDH Transmitter Outputs (Options UHC, [US6])
2.048 Mb/s Additional Output Delay
30. Connect the PDH SIGNAL OUT 1 port to the Oscilloscope Channel 1. Set the
Oscilloscope termination to 1MΩ.
31. Connect the PDH SIGNAL OUT 2 port to the Oscilloscope Channel 2. Set the
Oscilloscope termination to 1MΩ.
32. Check that the pulse on Channel 2 is 4 bits delayed with respect to the pulse on
Channel 1.
33. Disconnect the SIGNAL OUT 2 port from the oscilloscope and connect the
SIGNAL OUT 3 port to the oscilloscope Channel 2.
34. Check that the pulse on Channel 2 is 8 bits delayed with respect to the pulse on
Channel 1.
35. Disconnect the SIGNAL OUT 3 port from the oscilloscope and connect the
SIGNAL OUT 4 port to the oscilloscope Channel 2.
36. Check that the pulse on Channel 2 is 12 bits delayed with respect to the pulse on
Channel 1.
37. Ensure that the ratio of +ve and -ve pulse amplitudes is between 0.95 and 1.05.
38. Ensure that the ratio of +ve and -ve pulse widths is between 0.95 and 1.05.
8.448 Mb/s Output Pulse
39. Connect the PDH SIGNAL OUT 2 port to the Oscilloscope Channel 1.
40. Press and set up the
display as shown opposite.
41. Press on the
oscilloscope.
42. Adjust the Oscilloscope Timebase and
Delay to position the positive peak pulse
amplitude at mid-pulse-width point in the
centre of the screen.
43. Measure the peak pulse amplitude at
mid-pulse-width using the Oscilloscope
and verify that this is between 2.133V and 2.607V.
44. Select the 8Mb/s G703 Mask on the oscilloscope and store it on the Display.
45. Press SHIFT on the oscilloscope to automatically align the pulse
to the mask. Verify that the pulse falls within the mask as shown in Figure 3-17.
TRANSMIT
AUTOSCALE
AUTOSCALE