6 replies to this topic

[Just Me]

Hey!

 

adenin created a patch for Enigma2 to support the JESS (Jultec Enhanced Stacking System) format. Original thread

 

JESS (EN 50607) is an enhanced unicable protocol:

 

 

New tuning format "JESS" (JULTEC Enhanced Stacking System) for CSS systems

Purpose:

The purpose of defining and introducing a new tuning format is to solve problems and limita- tions with the existing tuning format that is defined in EN50494.
EN50494 allows to feed 8 tuners via one coaxcable, although there is already hardware for 12 tuners available. The maximum possible number of userbands within the usable Sat-IF fre- quency range separated with optimal filters is 30 (UB spacing 40MHz). JESS allows to address 32 userbands.

For tighter output frequency allocation the filters have to become more accurate. Therefore the tuning stepsize of 4MHz is not frequency-agile enough. JESS allows to tune exactly per MHz. To prevent any needs for look-up-tables etc., the Sat-IF frequency, the tuner in the set top box would tune to when a LNB is connected directly, is transmitted.

The limitation of EN50494 to address two satellite systems only prevented the use of channel stacking systems in many apartment blocks so far. JESS has enough capacity to address 64 satellites through the single downlead cable.
The new data format still bases on a serial bursted 22kHz tone data transmission. The advant- age is compatibility with existing platforms and installations. Satellite receivers and stacking devices can be upgraded to JESS by just a firmware update. Hardware modification may be re- quired for bi-directional use of JESS.

Downwards compatibility:

All stacking devices according to JESS must be downwards-compatible with the message format according to EN50494. This means that the functions of the new tuning format must be added on top of the existing EN50494 functionality. The amount of functions may be reduced in downward-compatible mode (e.g. EN50494 receiver can only control 2 satellite systems while stacker hardware may provide 4 satellite systems). New format and EN50494 can be mixed and work parallel (e.g. UB1 uses EN50494 tuning, UB2 uses "new" tuning). Functions such as beacon tones known from EN50494 are still supported. 

 

More information can be found here:

Spezifikation.pdf

http://jultec.de/gloss_JESS.html (german only)

 

Maybe you can check this patch and add support for JESS in openPLi.

Attached Files

•  jess.tar.gz   5.37KB   15 downloads

[doubledip]

This is amazing News!

[Dimitrij]

See

https://github.com/o...939f1556fd1b4c0

[littlesat]

Is this patch usable on OpenPLi....? Does someone has such system so it can be tested?

[Dimitrij]

Is this patch usable on OpenPLi....? Does someone has such system so it can be tested?

While I know nothing.
This is for information only.

[raceroad]

Is this patch usable on OpenPLi....? Does someone has such system so it can be tested?

 

I’m not able to create an new image. But reading post 62 of the thread Just ME has linked above, for someone, who has knowledge about building an image, it seems not so difficult to integrate adenis's  patch.

In another forum someone wrote, OpenATV-Image suppots JESS since Friday 17th (Link, not tested by myself).
 

[Just Me]

http://code.vuplus.c...f968db25bf63f81