While acquiring spectrum, you may use the
mouse to drag the FFT spectrogram (in the upper chart) up and
down, or double-click the buttons to change the scaling of the
Multiple Spectrograms can be enabled for different channels under
Once you stop the spectrogram, you may click
on the spectrogram to enable a cursor and drag it horizontally to
study the spectrum
also click on the waterfall chart to enable a crosshair to show
the frequency/elapsed time
Waterfall chart is sizable for more history
Channel number is a 0-based index to Windaq's scanlist.
For example, if Windaq has channel 3,4,6,7 enabled, one can enter
0 for channel 3, 1 for channel 4, 2 for channel 6 and 3 for
Select: Highlight/Select a channel in Windaq and fire up this
Windaq add-on, and it will use the selected channel as its default
Dynamic Amplifier option: FFT1024's
resolution is about 10-bit, thus weak frequency components will
be buried in the noise. To address this problem, Dynamic
Amplifier option is created.
When checked, waveform's average DC component is removed, then
amplified to at least half dynamic range, before performing FFT. As
the result, low level signal is much easier to study. See below for
the demonstration. This option
becomes obsolete if you move to Spectrogram
Due to Windaq's memory allocation approach, up 29 channels can be
enabled in Windaq if you wish to use this add-on
For better performance, please switch to
the second generation of Windaq Add-on, Spectrogram
for users with paid registration
No ad-line in the charts
No run time limit
To Use WinDaq Add-ons
Confirm WinDaq 3.16 or higher is installed on your
Install WinDaq add-ons.
Start WinDaq, and you will find the WinDaq add-ons
integrated into Windaq->View->Add-ons menu (see the screen
Intelligent Channel Selection: Highlight/Select a
channel in WinDaq and fire up the WinDaq add-on you wish, and the
WinDaq add-on will use the selected channel as its default channel.
If channel index number is required for a WinDaq
add-on, please enter the 0-based index to Windaq's scanlist. For
example, if WinDaq has channel 3,4,6,7 enabled, one can enter 0 for
channel 3, 1 for channel 4, 2 for channel 6 and 3 for channel 7.
Do not change WinDaq's configurations while
WinDaq add-ons are running, or some add-ons may terminate.