trig TY96, Руководство по установке

Страница: 27 / 47

TY96/96A and TY97/97A VHF Radio Installation Manual 26 September 2018
01238-00 Issue AJ
______________________
Trig Avionics Limited Page 21
separately.
The microphone gain is adjusted in steps of 1 dB. The left end stop on the range corresponds to a
nominal sensitivity of 200 mV; the right end stop corresponds to a nominal sensitivity of 6 mV. The
factory original setting is 6 steps from the left of the range.
6.2.12 LCD Dim Point
The LCD backlight illumination is controlled automatically by the ambient light sensor. Depending on
the amount of light spill in the cockpit, and the brightness of other adjacent avionics displays, it may be
necessary to adjust the darkest setting of the backlight to best match other equipment and to improve
the cockpit appearance at night.
Note – it is only practical to do this in pitch darkness, since that is the in-flight environment that you
are trying to reproduce. If you are working in a hangar with any other lighting it may be better to leave
the setting in the mid-range.
6.2.13 LCD Brightness Curve
The actual maximum brightness of the LCD cannot be increased with this control. What it controls is
the rate at which the lighting increases in brightness as the ambient light increases. This allows the
brightness to be matched to other avionics displays during light level changes as far as possible.
6.2.14 Single PTT Mode
In the factory standard configuration pressing PTT1 sends only Mic 1 to the transmitter; PTT2 sends
only Mic 2. For a retrofit installation, for example when replacing an SL40 radio, a single PTT is
shared between the two microphones. Enabling Single PTT mode means that whenever PTT1 is
pressed both Mic 1 and Mic 2 audio is sent to the transmitter.