Ramsey Electronics SG560 Betriebsanweisung PDF herunterladen (Seite 72)

USER CALIBRATIONS

5.00 USER CALIBRATIONS

Several features of the COM3010 can be calibrated by the user: The RSSI Meter, the Master

Time Base, and the Modulation Bargraph Meter.

When displaying the calibration screens items surrounded by ‘[ ‘]’ indicate user functions,

where the ‘<‘ ‘>‘ indicate password functions. Password functions are reserved for

technicians with proper equipment only.

5.10 Calibrate the RSSI Meter

Calibrating the RSSI Meter allows the user to “Null-out” cabling losses. This ensures that the

interface cable’s response is not part of the RSSI measurement. When the unit is finished

calibrating it will perform numerous calculations and produce a table for reference. This table

will then be stored in the COM3010’s Flash Memory for later use. The RSSI meter can display

any level between –40dBm and -120dBm to an accuracy of 1 dB.

1. Set the Squelch Control fully counterclockwise.

2. Select a Cable or series of cables and connectors to be used for testing.

3. Press to enter the Main Calibration Menu.

4. Press to select RSSI Meter Cal.

5. Remove any cables from the RECEIVE IN jack. This allows the Meter to get a baseline

calibration with no signal.

6. Press to continue.

7. Connect your selected cable between the RECEIVE IN jack and the RF OUT jack.

8. Press any key to start the automatic RSSI calibration. The COM3010 will now run

through a series of frequencies and levels taking measurements for each.

9. When complete the unit will beep and display “Changes saved!” in the Receive screen.

This process will take approximately 2 ½ minutes.

10. Press any key to return to the Main Calibration Screen.

11. Press to EXIT and return to normal operation mode.

RECEIVE Level Meters

Counter Freq Meters

GENERATE TX Level

Modulation Seq/Reg

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 103 104

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Ramsey Electronics SG560 Betriebsanweisung Seite 72