GTR 200 Installation Manual 190-01553-00
Page 3-16 Rev. B
3.6.5.3 Audio Tests Page
The Audio Tests page (Figure 3-14) and the following procedure will ensure that the audio level into the
GTR 200 AUX/Music inputs (listed in Table 3-9) is set to the ideal level for best sound quality and noise
rejection. It will also ensure the audio level heard in the pilot headset is at the desired level.
Refer to Section 3.6.4
to select the Audio Tests Page.
The solid bar represents the average signal level and the vertical line represents the peak level. If the AUX
levels are not set correctly, alerts connected to the AUX inputs may be partially or completely muted. The
AUX SQUELCH (see Section 3.6.4.3
) can be adjusted if the AUX input level cannot be set to the proper
range. The AUX SQUELCH will not require adjustment from the 30% setting if the input level is set to
the proper range.
Figure 3-14 Audio Tests Page
1. Turn on the audio source connected to the AUX/Music input(s).
2. Place the GTR 200 in CONFIG MODE.
3. Select the AUDIO TESTS subpage.
4. Use the LARGE and SMALL Knobs to select the audio source.
5. With the audio source active adjust the audio source output level so the average level is between
the two marks on the level bar.
6. Use the LARGE Knob to move to the VOL selection.
7. While wearing a headset use the SMALL Knob to adjust the headset volume to the desired level.
8. Repeat for any other AUX/Music inputs.
Table 3-9 Audio Tests Source Selections
Selection Description
OFF No audio source selected.
AUX 1 & 2 Auxiliary inputs 1 and 2. These inputs are not muted.
MUSIC LEFT
AND RIGHT
Stereo music input. This input can be muted.
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