Midian VS-1000, Manual

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3. RX Input: The goal of this procedure is to determine the audio level that the scrambler board will see at the
RX audio pickup point after it is installed. This requires a partial installation of the scrambler, even if only
temporary.
The scrambler must be powered-on while making this measurement, so the power input leads of the
scrambler must be connected to a switched power source within the radio. Also, the component that will need
to be removed to break the RX audio path must be removed. The scrambler board RX input wire must be
connected to the RX audio pickup point. Modulate a 1000 Hz tone at either 60% or 100%. Measure the audio
level at RX audio pickup point.
4. TX Input: The goal of this procedure is to determine the audio level that the scrambler board will see at the
TX audio pickup point after it is installed. This requires a partial installation of the scrambler, even if only
temporary.
The scrambler must be powered-on while making this measurement, so the power input leads of the
scrambler must be connected to a switched power source within the radio. Also, the component that will need
to be removed to break the TX audio path must be removed. The scrambler board TX input wire must be
connected to the TX audio pickup point. Provide the radio an audio source generating a 1000 Hz tone and key
the radio. Adjust the audio source such that the modulation is at 60%. Measure the audio level at the TX
audio pickup point.
Programming The Audio Levels:
After determining the audio levels at the audio hookup points, it will be necessary to program the scrambler to
match these levels. In the programming software, there is a slider control on the Audio Levels Screen for each of
the of four audio hookup points. Locate the column that corresponds to the modulation and units of measurement
for each of the audio hookup points. Adjust the slider bar such that the value appearing in the appropriate column
matches what was measured as closely as possible.
Beep Volume Level:
Adjust the slider for the desired beep volume. This level is expressed as a percentage of max voice audio level.
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