Full information about the transmit support in this program is available here [link].
Select transmit options from either:
The microphone (audio input) settings and configuration are described in detail here [link].
Version 3.0.14 addresses some of the problems causing breaks in transmission, mainly to do with buffering of data before it is sent to the pluto. Below is a check list, I hope you fine it useful.
To reduce any problems caused by a lack of USB power use an external power supply and connect to a well-powered USB socket, preferable a powered USB hub. Smaller PCs such as NUCs may not be able power external USB devices and perform high CPU processing at the same time. More USB information is here [link].
When starting Pluto use a low bandwidth - if using Es'Hail 2 (QO-100) there is no reason to use 3MHz on the narrow band transponder. Lower bandwiths such as 750kHz and 1.5Mhz have a correspondingly lower USB throughput, this reduces problems caused by the USB interface on Pluto.
The buffers are show in the window below. here you see the data size sent to the Pluto with each call to the Libiio API as well as the state of the unsent data in the buffer.
The unsent (current) value is also shown at the bottom of the Radio window.
The output of the transmitter is determined by:
The radio window shows the Peak data level - this is the data level passed to the Pluto compared to the theoretical maximum, so a peak of -0.7 dB shows a very high (good) modulation level.
When a radio runs in full duplex the transmitter and receiver are running at the same time; full duplex is recommended.
If running in full duplex you may wish to mute the receiver while you are transmitting.
Select Receiver Mute from the Transmit Options.
If you have problems such as breaks in reception or 'stutter' please visit the USB support page [link].