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DG8SAQ VNWA 3 - Expansion board Manual v1.3
Fig 1. VNWA 3 Expansion Board fitted to VNWA 3 Main PCB
1. Introduction:
The DG8SAQ VNWA 3 Expansion Board is a small optional Printed Circuit Board which provides the
DG8SAQ Vector Network Analyzer with additional functionality as follows:
2nd Audio Codec allowing S11 and S21 measurements to be performed in a single sweep
instead of 2 sweeps.
2.7V Switched mode power supply for DDS Supply - USB power consumption reduced to from
0.41 Amp without Expansion board to 0.33 Amp despite additional power consumption of 2nd
Audio Codec on the Expansion board.
RJ11 connector making the VNWA3 control signals and power accessible to the outside world
Optional SMA connector to obtain the multiplied 12 MHz internal TCXO clock or to feed in an
external 36 MHz clock source.
This document describes how to fit the Expansion Board into the VNWA 3 and how to configure the
VNWA Software to obtain full performance.
2. Important Information
Copyright notice
The design of the VNWA 3 and Expansion Board is copyright by Thomas Baier DG8SAQ & SDR-Kits -
all rights reserved -
SDR-Kits VNWA 3 Expansion Board v1.3 - Copyright 2011-2013 by SDR-Kits Page 1 of 10
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