Ramsey Electronics COM3010 User Manual page 74

USER CALIBRATIONS
5.20 Calibrate the Master Time Base (Continued)
1. Connect an accurate reference frequency source to the COM3010's RECEIVE IN jack.
2. Press
3. Press to select [Freq Ref]. Note the warning about having a good reference.
4. selects [YES] to continue and enters the Frequency Calibration menu.
5. Press and enter the source frequency. Example: 955 MHz.
6. Verify reception of the desired reference frequency by checking the RSSI Meter in the
lower right of the RECEIVE screen. This signal must measure at least –85dBm, which is
represented by four divisions.
7. Press The reference source was connected in Step 1.
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8. Press any key to automatically calibrate the COM3010 using [AutoCal].
9. When the GENERATE screen reads "Frequency calibrated Press any key", press any key
to return to the Frequency Calibration screen.
Do not reproduce or distribute.
10. To manually calibrate or fine tune the Auto Cal, press
11. The
also be directly entered into the Cal: field via the keypad.
12. Press either
old values.
13. Press any key to exit to the Main Calibrations Menu.
14. Press to return to Operational Mode.
Your Notes:
to enter the Main Calibration Menu.
can be used to zero the IF.1 or the PPM fields. Calibration values may
to exit and save the calibration value or
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to enter the Cal: field.
to abort and restore