T6T VHF 100 W Transmitter
Page 26
Maintenance
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(7)
Check that after downloading to a radio, no invalid parameters are returned (such parameters
are displayed as red text). If there are invalid parameters, amend them and then repeat the
download.
(8)
When there is no further requirement for using the VFP, exit the VFP software and disconnect
the radio from the PC.
To Initiate a BIT Test
(1)
Using a radio to PC Serial Interconnection Lead, Park Air part number 17E12600001, connect
the radio’s front panel Microphone/Diagnostics connector to the PC’s Com Port 1 or Com Port 2
(note which Com Port is used).
(2)
Run up the VFP software and check that a blank VFP screen is displayed.
(3)
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.
(4)
At the Menu Bar select Radio > Test.
(5)
An interruptive BIT test now takes place. The results are displayed in the BIT window.
(6)
If there is no further requirement for using the VFP, exit the VFP software and disconnect the
radio from the PC.
To Calibrate the Transmitter
(1)
Connect a dummy load via a power meter to the transmitter Antenna connector.
(2)
Remove the transmitter’s bottom cover.
(3)
Using a radio to PC Serial Interconnection Lead, Park Air part number 17E12600001, connect
the radio’s front panel 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.
During an interruptive BIT test, the transmitter radiates modulated carrier waves at the set power.
Users should therefore obtain the necessary authority before initiating a test.
If the test is to be carried out with the antenna disconnected, ensure a load is fitted to the
transmitter's Antenna connector.
In order to test the line input stages, an internally generated 1 kHz tone is injected into the line input
circuit. Any other audio present on the line input will cause the test to be inaccurate. Therefore the
transmitter MUST NOT be keyed during the test.
Summary of Contents for T6T
Page 1: ...T6T VHF 100 W Transmitter User Documentation ...
Page 10: ...Back to Transmitter Main Page Intentionally Blank ...
Page 54: ...Back to Transmitter Main Page Intentionally Blank ...
Page 115: ...Back to Transmitter Main Page Fig 13 PA Modules Removal and Refitting Detail PA 1 PA 2 ...
Page 118: ...Back to Transmitter Main Page Intentionally Blank ...
