Edge Duty Cycle Verification; Edge Rise Time Verification; Edge Frequency Verification - Fluke 5820A Service Manual

Set the Calibrator Mainframe to the Edge menu. Press on the Calibrator
Mainframe to activate the output. Then follow these steps to verify Edge frequency.
1. Set the PM 6680's FUNCTION to measure frequency on channel A with auto
trigger, measurement time set to 1 second or longer, 50
2. Using the N to BNC cable, connect the CHAN 1 connector on the Calibrator
Mainframe to PM 6680 channel A.
3. Program the Calibrator Mainframe to output 2.5 V at each frequency listed in Table
3-15.
4. Allow the PM 6680 reading to stabilize, then record the PM 6680 reading for each
frequency listed in Table 3-15. Compare to the tolerance column of Table 3-15.
Calibrator Mainframe
Frequency
(Output @ 2.5 V p-p)
1 kHz
10 kHz
100 kHz
1 MHz
10 MHz

3-38. Edge Duty Cycle Verification

This procedure uses the following equipment:
PM 6680 Frequency Counter
N to BNC cable supplied with the Scope Calibrator
Set the Calibrator Mainframe to the Edge menu. Press on the Calibrator
Mainframe to activate the output. Then follow these steps to verify Edge duty cycle.
1. Set the PM 6680's FUNCTION to measure duty cycle on channel A with auto
trigger, measurement time set to 1 second or longer, 50
2. Using the N to BNC cable, connect the CHAN 1 connector on the Calibrator
Mainframe to PM 6680 channel A.
3. Program the Calibrator Mainframe to output 2.5 V at 1 MHz.
4. Allow the PM 6680 reading to stabilize. Compare the duty cycle reading to 50%
5%.

3-39. Edge Rise Time Verification

This procedure tests the edge function's rise time. Aberrations are also checked with the
Tektronix 11801 oscilloscope and SD-22/26 sampling head.
The following equipment is used to verify the edge rise time:
High Frequency Digital Storage Oscilloscope: Tektronix 11801 with Tektronix SD-
22/26 sampling head
3 dB attenuator, 3.5 mm (m/f)
Table 3-15. Edge Frequency Verification
PM 6680 Reading
(Frequency)
Calibration and Verification
Verification
impedance, and filter off.
Tolerance
.001 Hz
0.01 Hz
0.1 Hz
1 Hz
10 Hz
impedance, and filter off.
3
3-31