Modulation select (MODUL): sets the type of modulation transmitted.
The modulation of your receiver will determine whether you utilize PPM or PCM setting in MODUL during transmission.
Note that you have to turn your transmitter off and back on before a modulation change becomes effective. If you choose
PCM,besure you understand and set the FailSafe (F/S) settings as you intended (see p. 41).
PCM = Pulse Code Modulation PPM =Pulse Position Modulation (also called FM).
Adjustability:
•
PCM setting for all Futaba PCM1024 receivers, regardless of number of channels
(ie.R138DP/148DP/149DP, R309DPS);
•
PPM setting for all Futaba compatible (negative shift) FM receivers, regardless of
number of channels (ie. R127DF, R123F, R148DF).
•
Not compatible with PCM512 receivers such as the R128DP and R105iP.
•
Not compatible with other brands of PCM receiver, or positive shift FM receivers
(ie. JR, Airtronics).
GOAL of EXAMPLE: STEPS: INPUTS:
NOTE: When you change models in MODEL SELECT,ifthe
new model is set to the other modulation type, you must
cycle the transmitter power to change modulations. The
modulation will flash on the home screen to remind you
until you do so. See p. 25, MODEL SELECT, for details.
30
Change model 1 from FM (PPM)to
PCM
Where next?
Confirm you are currently using the
proper model memory (Ex: 1)
Open BASIC menu, then open
PARAMETER submenu.
Go to MODUL and change setting.
Close menu and cycle power.
On home screen, check model name and
number on top and the modulation
on bottom. If it is not the correct
model, use MODEL SELECT,p.25.
for 1 second.
(If ADVANCE, again.)
to 3rd page of menu.
to PARAMETER.
to MODUL.toPCM.
PCM flashes on screen
P
OWER OFF.POWER ON.
Now that the model is in the proper modulation, the 7C should communicate
with the receiver. If it does not, confirm the modulation/frequency of the
receiver. [Futaba receivers ending in F use PPM (ex: R127DF), ending in P use
PCM (ex: R149DP)].
Change MODEL TYPE to helicopter: see p. 28.
Set F/S settings for when PCM receiver sees interference: see p. 41.
Utilize servo REVERSE:seep. 31.
Adjust servo travel with END POINT:seep. 32.
Set up dual/triple rates and exponential (D/R,EXP): see p. 34.
