Park Air Systems T6TR, User Documentation

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T6TR VHF 50 W Transceiver Page 10 Operation
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Input Line Level Setting
The input line level setting displayed on the front panel is equivalent to the average speech level with a
peak-to-average ratio of 13 dB. This corresponds to the level specified for the lines.
When testing the transceiver using a sine wave, the line input level should be set to 10 dB above the line
level setting. The VOGAD and mute thresholds are preset at 10 dB and 15 dB respectively below the line
level setting.
Table 4 shows the relationship between the input line level, VOGAD threshold and mute threshold.
Output Line Level Setting
The output line level setting displayed on the front panel is equivalent to the average speech level with a
peak-to-average ratio of 13 dB. This corresponds to the level specified for the lines.
When testing the transceiver using a signal generator with sine wave modulation, the line output level
will be 10 dB above the line level setting.
Table 5 shows the relationship between line level, output levels with average speech and sine wave
(assuming that the audio AGC is set to on, and the modulation depth is between 30% and 100%).
Table 4 Relationship Between Line Level, VOGAD Threshold and Mute Threshold
Line Level
Setting (dBm)
Average Speech
Level (dBm)
Sine Wave Level
(dBm)
VOGAD Threshold
(dBm)
Mute Threshold
(dBm)
+10 +10 +20 0 -5
+5 +5 +15 -5 -10
0 0 +10 -10 -15
-5 -5 +5 -15 -20
-10 -10 0 -20 -25
-15 -15 -5 -25 -30
-20 -20 -10 -30 -35
-25 -25 -15 -35 -40
-30 -30 -20 -40 -45
Table 5 Relationship between Line Level, Output Levels with Average Speech
and Sine Wave
Line Level Setting
(Front Panel Setting)
(dBm)
Output Level with
Average Speech
(dBm)
Output Level with
Sine Wave
(dBm)
+10 +10 +20
+5 +5 +15
0 0 +10
-5 -5 +5
-10 -10 0
-15 -15 -5
-20 -20 -10
-25 -25 -15
-30 -30 -20