DG8SAQ VNWA 3 & 3E - Vector Network Analyzer - SDR-Kits

3.4.6 This step is only applicable to VNWA 3E - fitted with Auxiliary Capture Device.
Check Aux Audio Capture Device box is ticked and Aux Capture Device is available.
Select Tab “Audio Settings” and set Audio Capture Device (1) to “USB Audio Codec”
Set Recording Mode to "Capture" and Recording Device to either "Microphone" or “Line”,
whichever is available. Set Aux Capture Device (2) to the second USB Audio Codec that is
available for selection. Make sure that different USB Audio Codecs are selected for (1) and
(2). Finally check the other settings as displayed below.
Troubleshooting: If "Auxiliary Audio Capture Device available" is NOT shown, then exit
VNWA application and add the line AuxAudio=1 to the file VNWA.ini with a text editor and
restart the VNWA Application. See also VNWA helpfile for further information.
3.4.7 This step for VNWA 3E Only - VNWA 3E has two Audio Capture Devices fitted, shown in
step 3.4.6. Audio Capture Device 1. must be the main capture device, because it is hard wired
to the REFL/TRU switch.
It is important that configuration shown below is done with VNWA TX and RX Ports not
connected! (Nothing connected)
Click on “Calibrate Sample Rate” button. If the Sample Calibration Rate fails (First pulse not
detected) then reverse the settings of the two USB Audio Capture Devices and test again. (ie
Audio Capture Device (1) is changed and is now set to "USB Audio Codec" and Aux. Audio
Capture Device (2) is set to "USB Audio Codec (2)".
SDR-Kits VNWA 3 & 3E "Getting Started" Manual W7 - XP v2.0 - copyright 2013 by SDR-Kits Page 31 of 47