Expert Electronics SunSDR2 DX

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SunSDR2 DX User Manual

ExpertSDR2 SOFTWARE DESCRIPTION

- slider for the microphone gain level. In CW mode, it switches to

the Speed button and duplicates the BreakIn functionality.

- In the drop-down menu, you can select Mic1, Mic2 - transceiver's

microphones, Mic PC - PC's microphone.

Note:

Remember, if you disable the MIC AGC, it may distort your signal and cause interference to

neighboring stations.

A panel of mode buttons:

- Amplitude Modulation

- Synchronous Amplitude Modulation

- Double Side Band

- Lower Side Band

- Upper Side Band

- CW mode.

Note:

It works in CW-U for all bands. It cannot be changed.

- Narrow FM

- Wide FM, supports receiving of the stereo signals

Note:

Amplitude Frequency Characteristic (AFC) has deemphasis when you operate in FM modes.

AFC slope in WFM is determined by a standard. Europe standard determines AFC slope with

time constant 50 ums (like in first order LPF), US standard 75 ums.

There is no such standards for NFM, thus we used our own parameter.

In NFM time constant is high, which allows to mute HF noise when there is no stations and

Expert Electronics SunSDR2 DX - Page 43