|
|
|
|
|
|
|
|
|
hi
can you please tell more ? it sucks that i used so much money on only 1 channel more but thats life. i can use my uhf reapeter http://fpvlongrange.com/fpv-repeater-system/ to get all 11 channels inn use :-)
|
|
|
|
|
||
|
|
you an choose ppm8 or ppm9, dmss, spcm and dsm in the modulation menu.
what is spcm and where is it used? ![]() Quote:
|
|
|
||
|
|
|
|
UK
Joined Aug 2003
1,890 Posts
|
Bjorn,
JR's modulation started off with PPM, then PCM (Z) which is an encoded 9 bit system giving 512 discrete steps. They then switched to SPCM which is 10 bit giving 1024 discrete steps. Problem is that in order to get this data in the correct time frame they alternate channels 9 & 10 each frame. ie they send out channels 1,2,3,4,5,6,7,8,9 then 1,2,3,4,5,6,7,8,10. For the 12X they introduced APCM to get the 12 channel data out. This is not compatible with any other receiver that JR used. A 10X transmitter using SPCM could use any SPCM receiver, a PCM9X transmitter could use up to the 10 channel receiver but obviously the 10th channel would be inoperative. |
|
|
|
| Thread Tools | |
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| New JR receiver sent in for repair 12+ BD turnaround. | sa-10 | Fuel Plane Talk | 6 | Sep 29, 2002 02:38 PM |
| New Jr Batt, New Jr Servos, Hitec Rx W/xtl, Electronic Mixer | saint152 | Aircraft - Electric - Airplanes (FS/W) | 2 | Mar 15, 2002 12:26 PM |
| New JR X-378 Radio | wayne | Electric Heli Talk | 0 | Nov 05, 2001 11:10 AM |
| Brand New JR ERGO 60 Sport | Jim McPherson | Aircraft - Electric - Airplanes (FS/W) | 1 | Oct 14, 2001 08:00 AM |
| Brand New JR ERGO 60 Sport | Jim McPherson | Aircraft - Electric - Helis (FS/W) | 0 | Oct 13, 2001 04:52 PM |