results in excellent audio quality of the transmitted signal and extends the
effective range of the transmitter.
Correct microphone level adjustment is required for optimum modulation
level. If a headset is changed to another type, microphone level should be
checked before use. The microphone level adjustment function (in the First
Level Menu) has a convenient bargraph readout, making adjustment simple
and accurate.
Annunciators
The bottom line of the display provides three annunciators.
On the left-hand side, a small bargraph indicates the setting of the volume
control.
In the center is a display of nominal supply voltage at the power terminals of
the connector on the rear of the case. This periodically changes to indicate
the temperature of the transmitter. The temperature is in Centigrade and may
rise as high as 95°C for high ambient temperatures and during periods of
intense use of the transmitter. Output power is reduced automatically at high
temperatures to limit the possibility of damage to the transmitter.
On the right-hand side is an indicator of the frequency method or spacing
used for setting the operating frequency. When using Channel memories, this
shows 'CHL'. For entering frequencies, either in Flip-flop or Direct modes, this
shows the frequency spacing. '25K' indicates that the frequency may be set in
steps of 25KHz while 833 indicates that frequencies are available in steps of
8.33KHz. Frequency setting and readout on the display is according to ICAO
standards for both spacings.
Visit
www.MGLAvionics.co.za to download the latest version of this User and
Installation Manual.
10
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