Multimedia High Speed Modem
FAQ:
Introduction:
Installation:
Connections:
User Interface GUI:
Live Data Streaming:
TRX Settings:
using SDR Console:
Technical Specification
for Developers
References:
FAQ:
Introduction:
Installation:
Connections:
User Interface GUI:
Live Data Streaming:
TRX Settings:
using SDR Console:
Technical Specification
for Developers
References:
The high-speed multimedia modem would not deserve the name if it could not also transmit digital speech. Therefore, this possibility was also implemented in the menu item “Voice Audio”8).
Here the inputs and outputs of the sound card or, as in the example (Fig. 18), virtual audio cables (Virtual Audio Cable VAC) are selected.
One of the five operating modes can be selected at a time:
If you offset Tx and Rx frequency by at least 5 kHz, true intercom (full duplex) is possible.
Here you can choose between two voice codecs. CODEC-2 works with a fixed audio rate of 3200 bps and is particularly suitable for low data rates. OPUS scales the audio rate in a ratio of 84 % to the data rate and offers a more natural speech quality at higher data rates (8APSK modes).