The narrowband spectrum display is of 96 kHz wide. This display usually corresponds to the narrowband spectrum of an SDR, like the DDC2 of WiNRADiO G3xDDC. The narrowband spectrum corresponds to the middle of the wideband spectrum display.
Narrowband spectrum display and media player/recorder Spectrum Analysis displays and marks detected signals.
Spectrum Analysis will detect and mark the signals in this display pane. The user can view the target signal in more detail and select the signal for classification or decoding by moving the middle frequency tuning cursor to the right position. The distance of the middle tuning cursor to the spectrum middle is displayed in the “Offset” field.
Below the spectrum display, there is a narrowband media player/recorder, where the user can make an IQ recording of the 96 kHz wide spectrum. Unlike in the wideband media player/recorder, the recording format can be PXGF or WAV. Whereas the PXGF format allows the recording of the side information, the conventional WAV format does not have this capability: the bandwidth (sampling rate) is fixed at the beginning of the recording and no side information can be periodically saved (implanted) during the recording.
The playback works in the same way as in the wideband media player/recorder. The frequency offset, the demodulator and the demodulator bandwidth apply to the acoustic signal output when the speaker button is on.
A recording can be played back in both media players and the playback runs in real-time.