High Frequency Calibration; Pulse Width Calibration - Fluke 5520A Service Manual

6-40. High Frequency Calibration

Connect the Calibrator Mainframe SCOPE connector to the power meter and power
sensor as described under "Equipment Setup for High Frequency Flatness".
Follow these steps to calibrate high frequency Leveled Sine Wave flatness for the
amplitude being calibrated.
1. Press the GO ON blue softkey.
2. Establish the 10 MHz reference:
Press the power meter SHIFT key, then FREQ key and use the arrow keys to
enter the power sensor's 10 MHz Cal Factor. Ensure that the factor is correct,
then press the power meter ENTER key.
Allow the power meter reading to stabilize.
Press the Power meter REL key.
3. Press the GO ON blue softkey.
4. Press the power meter SHIFT key, then FREQ key and use the arrow keys to enter
the power sensor's Cal Factor for the frequency displayed on the Calibrator
Mainframe. Ensure that the factor is correct, then press the power meter ENTER
key.
5. Adjust the amplitude using the Calibrator Mainframe front panel knob until the
power sensor reading matches the 10 MHz reference within 0.1%.
6. Repeat steps 1 to 5 until the Calibrator Mainframe display indicates that either the
reference frequency is now 50 kHz or that the next steps calibrate pulse width.
Repeat the low frequency calibration procedure for the next amplitude unless the
Calibrator Mainframe display indicates that the next steps calibrate pulse width. Press
the OPTIONS, then STORE CONSTS blue softkeys to store the new calibration
constants.

6-41. Pulse Width Calibration

This procedure uses the following equipment:
High Frequency Digital Storage Oscilloscope: Tektronix 11801 with Tektronix SD-
22/26 sampling head
3 dB attenuator, 3.5 mm (m/f)
BNC(f) to 3.5 mm(m) adapter (2)
BNC cable supplied with the SC600
second BNC cable
Press the OPTIONS and NEXT SECTION blue softkeys until the display reads "Set up
to measure Pulse Width". Then follow these steps to calibrate pulse width:
1. Connect the BNC cable supplied with the SC600 to the Calibrator Mainframe's
SCOPE connector. Connect the other end of the BNC cable to one BNC(f) to 3.5
mm(m) adapter then to the DSO's sampling head through the 3 dB attenuator.
2. Using the second BNC(f) to 3.5 mm(m) adapter and BNC cable, connect the
Calibrator Mainframe's TRIG OUT connector to the 11801's Trigger Input.
Calibration and Verification of Square Wave Voltage Functions
SC600 Option 6
6-25