Park Air Systems Limited B63300HS User Manual
T6T 300 Watt VHF Transmitter
Page 101
Maintenance
Setting a 5-Offset Carrier Frequency
If a 5-offset carrier frequency is required, set the offset using the following procedure:
(1)
Connect a 50 ohm frequency counter, through a 60 dB attenuator, to the combiner’s Antenna
connector.
connector.
(2)
Set the required 25 kHz channel frequency; for example, 124.500 MHz.
(3)
From the AM-Voice Mode Settings Screen set the required offset (+4 kHz, -4 kHz, +8 kHz or
-8 kHz); for example, a +4 kHz offset to give an operating frequency of 124.504 MHz.
-8 kHz); for example, a +4 kHz offset to give an operating frequency of 124.504 MHz.
(4)
From the Settings screen select Ref Freq and press the Scroll/Select switch.
(5)
Key the transmitter and adjust the reference frequency using the Scroll/Select switch until the
frequency counter displays the required operating frequency; for example, 124.504 MHz.
frequency counter displays the required operating frequency; for example, 124.504 MHz.
(6)
When the frequency counter displays the exact operating frequency, press the Scroll/Select
switch and stop keying the transmitter.
switch and stop keying the transmitter.
Disconnect the test equipment and reconnect the antenna.