User`s manual

100-M0056X2B 18 of 28
www.cobham.com/gms
Field R/W Description
Audio Enable
*
R/W
Analog audio encoder enable. Desired mode of
operation of the audio encoder is selected from the
following values: Off or On.
Audio Mute
*
R/W
Choice between mute or un-mute audio stream
Audio Level
*
R/W
Choice between mic or line level audio
Audio Gain
*
R/W
Adjustable gain between 0- 100
• Not applicable for embedded audio applications.
7.3.3 Pull-Down Menu Definitions
There are several different pull-down menus that are included in the MDT-B Configurator
program. Each of these pull-down menus contains further user-configurable options or
commands. The following sections describe these menus in detail.
7.3.3.1 File
This pull-down menu offers to exit the MDT-B Configurator program or to “Save
Parameters”. Alternatively the ‘X’ box in the upper right hand corner of the window can be
used to exit the program. And alternatively the “Store All Setup Pages” button on the main
menu will save all parameters.
7.3.3.2 Configuration
This pull-down menu contains several different configuration options. These are outlined
below:
 Special Setup
o Load MPEG Encoder Profile (see figure 6) – This menu displays the current
profile loaded and also presents possible profiles to load. Select the profile from
the pull down box (or use the browse button to point to area where other
profiles are located). Then click on the “Download Profile” button. A progress
bar appears which shows the profile loading. After the profile has been
downloaded it’s necessary to click on the “Store all Setup” button for the profile
to be saved. Once the profile is stored a message box appears indicating the
profile is stored. If the message box states the process failed then click on the
“Store All Setup” button again. Repeat until the message box indicates the
profile is stored.
o Others (see figure 7)- This menu displays the following:
 RF Output attenuation – The RF out can be attenuated in 0.5 or 1 dB
increments up to defined max. Both increment step and max value are
frequency band dependant.
 COFDM Spectrum Inversion choices include normal or invert. The
transmitter is configured with the receiver it ships with and the
inversion mode shouldn’t have to be changed. However if a different
receiver is used the inversion mode may have to be changed. Some
receivers will accept either inversion mode. Check the parameters of the
receivers to ensure the correct inversion mode is selected.
 RF Power Mode-Can be used to put transmitter in a sleep mode, a low
power mode where the encoder functions and many of the power
regulators are shut down enabling a saving in current when transmitter
is not active. The OFF state of the unit is displayed on the main window