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Once the carrier and modulation percentage has been set, disable the signal
generator and activate the microphone via the audio process chain and speak
into the microphone at a regular distance and normal tone of voice. Adjust the
audio level output of the audio process chain to where the voice peaks on the
oscilloscope do not go beyond -99% modulation peaks and avoid pinching at the
0 volt line.
Set up the Recording Device
Power up the recording device.
Initially set the input level to mid position (do not start recording yet).
Set up the Asymod HPSAV2 for RX
Put on the headphones and set the PHONES control to 12 o’clock. Adjust as
needed for comfort.
Headphones tone control can be adjusted at the PHONES TONE control located
on the audio board. Cover must be removed.
Initially set the REC MIX control to 12 o’clock.
Set the TX MON to the LINE setting.
Speak into the microphone (do not key up the transceiver at this time) and
adjust the REC MIX control to where both the received audio signals and your
voice are at the same level.
Observe the input level of the recording device while slowly raising the REC LEV
control, continue to raise the REC LEV not to exceed 0 dB on the recording
device input level.
At this point the recording levels settings are properly adjusted.
You can now start recording. The transmit audio and received audio will be
recorded at the same level.
Set up the Asymod HPSAV2 for Playback
To play back the recorded audio, set the playback device audio output level to
minimum.
Key up the transceiver and start the playback device.
While observing the modulation envelope, slowly raise the playback device audio
output level not to go beyond -99% modulation peaks and avoid pinching at the
0 volt line.
Summary of Contents for BT-HPSA V2
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