Sc200 Hardware Adjustments - Fluke 5080A Service Manual

Leveled Sine Wave Flatness Calibration
Leveled sine wave flatness calibration is divided into two frequency bands.
50 kHz to 10 MHz (low frequency) and >10 MHz to 200 MHz (high frequency).
Test equipment setup is different for each frequency band. Flatness of the low
frequency band is made relative to 50 kHz. The high frequency band is relative to
10 MHz.
Leveled sine wave flatness is calibrated at multiple amplitudes. Low and high
frequency bands are calibrated at each amplitude. Calibration starts with the low
frequency bands, then the high frequency band for the first amplitude, followed
by the low frequency band, then the high frequency band for the second
amplitude, and so on, until the flatness calibration is complete.
To start the leveled sine wave flatness calibration:
1. Push the OPTIONS and NEXT SECTION softkeys until Set up to measure
leveled sine flatness shows in the display.
For the low frequency band:
2. Connect the Product SCOPE connector to the 5790A Wideband input.
3. Push the GO ON softkey.
4. When you see a stable 5790 measurement, push the Set Ref softkey on the
5790A to set the 50 kHz reference. If necessary, push the Clear Ref softkey
on the 5790A before you set a new reference.
5. Push the GO ON softkey.
6. Use the knob on the Product to change the amplitude until the 5790A
reference deviation is less than 1000 ppm of the 50 kHz reference.
7. Do steps 3 to 6 until the Product display shows a reference frequency of
10 MHz.
To continue with the high frequency band:
8. Connect the Product SCOPE connector to a power meter and power sensor.
9. Push the GO ON softkey.
10. Push the SHIFT key on the power meter, then the FREQ key, and use the
arrow keys to set the cal factor of the power sensor for the frequency shown
on the Product display. Make sure the cal factor is correct.
11. Push the ENTER key on the power meter.
12. Use the knob on the Product to change the amplitude until the power sensor
measurement is less than 0.1 % of the 10 MHz reference.
13. Do steps 9 to 12 until the Product display shows a reference frequency of
50 kHz or the subsequent step is calibrate pulse width.
14. Do the low frequency calibration procedure again unless the Product shows
the subsequent step is calibrate pulse width.
15. Push the OPTIONS, then the STORE CONSTS softkeys to keep the new
calibration constants.

SC200 Hardware Adjustments

You must make hardware adjustments to the leveled sine and edge functions
each time the SC200 is repaired. This section contains a list of equipment and
recommended models necessary for these procedures. You can use equivalent
Calibrator
SC200 Calibration
65