Rear Panel Calibration Enable Switch; Reference Frequency Adjustment - Fluke 96000 Series Service Manual

measurement capability is not available
A spreadsheet file containing a detailed list of calibration adjustment points is
available on the CD supplied with the Instrument.

Rear Panel Calibration Enable Switch

The rear panel calibration switch must be set to the ENABLE (up) position prior
to attempting any of the calibration adjustment procedures described below. On
completion of all the required calibration adjustments, return the rear panel
calibration switch to the DISABLE (down) position and fit a calibration integrity
seal over the switch access.

Reference Frequency Adjustment

Equipment required for this test:
•
Frequency Counter
•
Frequency Standard
To adjust the frequency of the internal reference:
1. Warm up the UUT (continuous operation) for 24 hours, minimum.
2. Connect the 10 MHz output from the Frequency Standard to the EXT REF IN
on the Frequency Counter (rear panel) using a BNC male – male cable
assembly. Set the Frequency Counter for external time base reference.
3. Connect the REF FREQUENCY OUTPUT (on rear) from the UUT to the
Channel A input on the Frequency Counter using a BNC male – male cable.
Set the Frequency Counter input impedance to 50 Ω. See Figure 3-1 for
equipment connections.
4. On the UUT enable the REF FREQUENCY OUTPUT at 10 MHz.
5. On the UUT, push , followed by the softkeys Support
Functions>Calibration>Adjust Instrument.
6. Using the keypad, enter the password, and push .
At shipment, the factory default password is "2, SPACE, 3, SPACE,
5, SPACE, 7".
7. Push the softkey Adjust Frequency.
8. Set the Frequency Counter controls for a reliable and repeatable frequency
measurement.
9. Using the blue arrow keys and rotary knob, edit the UUT DAC Value until the
Frequency Counter indicates 10.00000000 ±0.00000010 MHz.
10. Push Previous Menu. If desired to proceed with base adjustment, push Adjust
Base. If not, push Exit.
Note
Calibration Adjustment
Calibration Adjustments
4
4-3