Re: Transmitter Software Capabilities and Issues
Posted: Fri Jan 12, 2018 4:31 pm
New Software Release
I've just issued a new release 201801061. The major changes are that it introduces the DATV Express as an output Device for the Signal Generator, and also allows the use of electronically-controlled attenuators on the Signal Generator. A future release will also allow the attenuator to be programmed to a set level for each band for the DATV Transmitter, so that you can adjust transmitter drive on a per-band basis.
The option is also introduced to apply 333KS QPSK modulation to the DATV Express Signal Generator or Portsdown Signal Generator Output. The level can then be adjusted whilst viewing the transmitted spectrum to allow the correct level to be set whilst monitoring spectrum regrowth.
The receive/signal monitor switching has been improved; only a single screen touch is now required to exit from receive, and the signal parameters are cleared from the screen after each receiving session.
Signal Generator details are here: https://wiki.batc.org.uk/Portsdown_Signal_Generator
Output Attenuator details are here: https://wiki.batc.org.uk/Output_Attenuator
Thanks to Ray M0DHP for writing the Attenuator control code and for testing and offering constructive comments.
Dave, G8GKQ
I've just issued a new release 201801061. The major changes are that it introduces the DATV Express as an output Device for the Signal Generator, and also allows the use of electronically-controlled attenuators on the Signal Generator. A future release will also allow the attenuator to be programmed to a set level for each band for the DATV Transmitter, so that you can adjust transmitter drive on a per-band basis.
The option is also introduced to apply 333KS QPSK modulation to the DATV Express Signal Generator or Portsdown Signal Generator Output. The level can then be adjusted whilst viewing the transmitted spectrum to allow the correct level to be set whilst monitoring spectrum regrowth.
The receive/signal monitor switching has been improved; only a single screen touch is now required to exit from receive, and the signal parameters are cleared from the screen after each receiving session.
Signal Generator details are here: https://wiki.batc.org.uk/Portsdown_Signal_Generator
Output Attenuator details are here: https://wiki.batc.org.uk/Output_Attenuator
Thanks to Ray M0DHP for writing the Attenuator control code and for testing and offering constructive comments.
Dave, G8GKQ