User's Guide

Page 26
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To Calibrate the Transceiver
(1) Connect a dummy load via a power meter to the transceiver’s Tx/Rx Antenna connector.
(2) Remove the transceiver’s bottom cover.
(3) Using a VFP to PC interconnection lead, Park Air part number 17E12600001, connect the radio’s
front panel Headset/Microphone/Diagnostics connector to the PC’s Com Port 1 or Com Port 2
(note which Com Port is used).
(4) Run up the VFP software and check that a blank VFP screen is displayed.
(5) At the Menu Bar, click on Serial Port and select either Com 1 or Com 2. The selection must
correspond to the port used to connect to the radio.
(6) At the Menu Bar select Radio > Retrieve > All.
(7) At the Menu Bar select Radio > Calibrate. The Confirm screen will then be displayed to remind
you that a dummy load must be connected before proceeding.
(8) With the Confirm screen displayed and dummy load connected, select Y
es to continue with the
calibrate routine. The Progress screen will then be displayed.
(9) When the PA Control/PA loop has been calibrated the Progress screen disappears and the VFP
screen re-appears showing a calibration complete message in the Status Information window.
(10) Gain access to the PA Control/Rx RF module and identify RV9 (this control is on the solder side
of the outer PCB adjacent to the label - see next page). From the transceiver’s front panel
AM-Voice or AM-MSK Settings screen, select PTT On.
(11) From the Settings pane of the VFP screen, note the RF power setting. Adjust RV9 until the power
meter reads this value.
(12) From the transceiver’s front panel AM-Voice or AM-MSK Settings screen select PTT Off, then
remove the power meter and dummy load. This completes the calibration routine.
(13) When there is no further requirement for using the VFP, exit the VFP software and disconnect
the radio from the PC.