Beep Cnt (Beep Centre)
Here you can set inputs to beep when centered. RETA123 corresponds to: RUD, ELE, THR, AIL,
P1, P2, P3 inputs. This is useful for locating the centre of the pots without looking (e.g., while
flying!). Press MENU to turn on centre beeping for an input.
Proto (encoding protocol)
PPM is the protocol used for many plug-in RF modules (including the OrangeRX DSM2/DSMX
and the FrSky DJT). You can set the number of channels to encode and the pulse spacing, but in
most cases, the settings should not be changed. (If you use a Spektrum DM9 module, set
spacing to 350uSec for more accurate centering.)
The PXX setting can be selected for the newer FrSky X8R module.
The DSM2 setting is used where an internal module extracted from a Spektrum transmitter is
"hacked" into the 9XR Pro. Instructions for doing this can be found at:
http://openrcforums.com/wiki/index.php/How_to_modify_your_9x_to_the_DSM_protocol
The DSM2 setting may also be used with future DSM telemetry modules.
Note: Each of the Proto settings opens up a different set of options. The following applies only to the
PPM setting. For PXX and DSM2 see documentation for that application.
Start Channel
This is the channel which is first in the PPM stream and is usually left at 1. Other start numbers
may be needed when using a flight controller which accepts the raw PPM.
PPM FrLen (Frame length):
The length of each frame within the PPM train. Normally need not be changed.
Shift Sel (Shift select)
POS/NEG. Select signal shift. POSitive or NEGative. Leave at POS if in doubt.
PPM2 Start Channel
Where two receivers are used for extra channels, PPM 1 is set to match the capability of the first
receiver, while PPM 2 is set for the second receiver. If first receiver is an 8-channel unit, then the
second receiver will normally start at channel 9. The options are: ‘Follow’ or a specific channel
from 1 through 17.
PPM2 Channels
The options are 4 through to 16 channels in 2-channel increments. This depends on the number
of channels your second receiver or flight controller can handle and how many channels you
need to send.
Ersky9x Explained – version 1
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