Wednesday, 10 July 2013
I have now added a nice piece of used test gear to my lab. The E4406A is a
Vector Signal Analyser or VSA. The unit I obtained was originally designed
for testing Cellular Radio base stations. Unlike a Spectrum Analyser it is
a wideband receiver with an ADC at the end. It has a bandwidth of 10 MHz
and will tune anywhere up to 4 GHz.. You can then do time or frequency
domain measurements. In the picture I have selected WCDMA mode, which
is a 3.84 MS/S QPSK signal to analyse the output of DATV-Express. If you
enter the advanced mode you can change the symbol rate and filter roll off
to match those of DVB-S. The unit also has a Basic mode which is modulation
agnostic. Another nice feature is the very, very clean synthesiser it uses allowing
much more precise measurement of oscillator phase noise than I can currently do.
It has a nice programming interface which will allow other measurements to be
made. All in all a very nice piece of gear for the price I paid. As you can see
DATV-Express passes with flying colours.