XIEGU G90 CHEAT SHEET
9
Requirement
SDR I/Q Program on PC
The computer must have a program capable of sampling the I/Q data from the sound card and
then displaying it on the com
puter’s display.
Two known usable computer programs are: “HDSDR” and “SDR#”. Each may be found by
searching the Internet and you will also find good details on using them. They have a learning
curve … beyond the scope of this document.
A few key points on these programs usage:
o
Assuming you are using a Windows computer, you will likely need to drill down in the
PC’s sound settings to see the micro phones advanced settings to select your USB port
being used and the 2 channel sample rate desired.
o
Select your sound card and the I/Q as the input signal source for HDSDR or SDR#
o
Select the desired bandwidth / sample rate to be used
o
There are options to set up CAT operation with the G90 to allow tuning syncing both
ways
o
Select ‘Run’ to begin the display
A sample
rate of 48,000 will yield a spectrum the same width as the G90’s front panel display, +/-
24 KHZ
A sample rate of 96,000 will yield a spectrum double the width of the G90’s front panel display,
+/- 48 KHZ or nearly 100 KHZ!
Both the HDSDR and SRD# programs are CPU resources intensive .. Especially SDR#. An
older, slower PC may get bogged down.
Sample HDSDR
Screen With a
Good Spectrum
Using
ICUSBAUDIO2D
sound card
Sampling at 48 KHZ
G90 tuned to 7250
KHZ and HDSDR
also tuned to 7250
KHZ
Receiving a LSB
voice signal
G90 CAT cable not
connected
A good example of a
clean spectrum
display.
