Difference between revisions of "Portsdown Transmitter User guide"

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m (Corrected lits and amended punctuation fir clarity)
 
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The Portsdown Transmitter has been designed to provide an easy way to “get on air” with Digital ATV at a relatively low cost covering all of the commonly used modes so enabling it to be used on ATV repeaters but also for RB-TV Dx working.
+
The Portsdown Transmitter has been designed to provide an easy way to “get on air” with Digital ATV at a relatively low cost, covering all of the commonly used modes, thus enabling it to be used not only on ATV repeaters but also for RB-TV Dx working.
  
  
 
[[File:KLB portsdown (1).JPG|400px|center]]
 
[[File:KLB portsdown (1).JPG|400px|center]]
  
There are now 2 different build configurations of the Portsdown DATV system - the Portsdown 2018 system was built around a custom made Filter Modulator card, which has now become obsolete, with an external local oscillator module.
+
There are now 2 different build configurations of the Portsdown DATV system - the Portsdown 2018 system was built around a custom made Filter Modulator card (which has now become obsolete) and an external local oscillator module.
  
 
The Portsdown 2019 system uses the LimeSDR Mini hardware in place of the custom card and no longer requires an external LO.
 
The Portsdown 2019 system uses the LimeSDR Mini hardware in place of the custom card and no longer requires an external LO.
  
  There is not intention to discontinue support of the Portsdown 2018 system, however the LimeSDR Mini has a greater frequency range and enables DVS-S2 transmissions suitable for use on Es'hail-2 but does have limitations on the maximum transmission symbol rate.
+
  There is no intention to discontinue support of the Portsdown 2018 system, however the LimeSDR Mini has a greater frequency range and enables DVS-S2 transmissions suitable for use on Es'hail-2. It does, however, have limitations on the maximum transmission symbol rate.
  
 
* [[Portsdown 2019| Portsdown 2019 should now be used for NEW system builds - detailed information can be found here]]
 
* [[Portsdown 2019| Portsdown 2019 should now be used for NEW system builds - detailed information can be found here]]
  
 
* [[Portsdown 2018| All the Portsdown 2018 wiki pages are still available via this link]]
 
* [[Portsdown 2018| All the Portsdown 2018 wiki pages are still available via this link]]

Latest revision as of 20:02, 5 October 2019

The Portsdown Transmitter has been designed to provide an easy way to “get on air” with Digital ATV at a relatively low cost, covering all of the commonly used modes, thus enabling it to be used not only on ATV repeaters but also for RB-TV Dx working.


KLB portsdown (1).JPG

There are now 2 different build configurations of the Portsdown DATV system - the Portsdown 2018 system was built around a custom made Filter Modulator card (which has now become obsolete) and an external local oscillator module.

The Portsdown 2019 system uses the LimeSDR Mini hardware in place of the custom card and no longer requires an external LO.

There is no intention to discontinue support of the Portsdown 2018 system, however the LimeSDR Mini has a greater frequency range and enables DVS-S2 transmissions suitable for use on Es'hail-2. It does, however, have limitations on the maximum transmission symbol rate.