In Options select Swap I and Q
channels.
This will make the frequency
display and waterfall display
correctly.
Select Channel Skew Calibration.
For initial settings enter the
values from the SDR-4+
Receiver test sheet included
with the receiver.
This will cancel out the
unwanted image. The settings
in the test sheet cancelled the
image greater than 80 dB on
final test.
On the main window press Start and the waterfall should start.
Important! One safety design feature of the SDR-4+ is that when it or the PC is
powered down all the bandpass relays are powered off shorting the bandpass filters
to ground to provide extra isolation and protection to the PC.. When first powered
up the relays remain in a safe condition until the receiver is tuned past a bandpass
filter change point i.e. 4, 8, or 16 MHz.
After powering up the receiver, step the frequency up or down by 10 MHz and the
filters will switch in. You can then select the required frequency of operation.
