Airman98

My Feedback: (9)

Spike I think running a servo on channel 28 does not prove how many channels the 731 can handle. If you had the receiver only using channel 28 you were not using 28 channels but 1. To test you need to run more than 17 channels at once.

warbird_1

My Feedback: (61)

if i'm not mistaken the only access to ch 28 would have to be through the Xbus port right?

warbird_1

My Feedback: (61)

We had problems here to just in the fact that JR could no longer produce receivers for the dsmx stuff.

warbird_1

My Feedback: (61)

JR - JRPR03597 - RG712BX 7CH DMSS XBus Receiver

• 7-channel Standard PWM output and single XBus output can be used in parallels

​so it is a true 7 channel receiver and xbus opens up the door to more servos and functionality

spike5150

I don't necessarily agree. In the 28x I had to activate all 28 channels, and therefore the Rx has to be receiving all 28 channels.

spike5150

Yes that is the way I understand it also. I had a CV4 converter plugged in to the xbus port and programmed one of the outputs to ch 28-01.

warbird_1

My Feedback: (61)

ok , just because you activated all channels in the TX doesn't mean your receiver follows suit . you only have 7 channels if you use the conventional ports, xbus allows you to expand the number of servos you can have on one channel "up to four servos per channel" and within that the xbus allows you to choose which servos run what . thus you can run up to 28 servos . you can also choose which channels you want to use 1-28 but you still only have 7 channels. if you could run 28 channels on a 7 channel receiver ,then you wouldn't need a 11 channel receiver or an infinity receiver . hope this helps , WB_1

warbird_1

My Feedback: (61)

spike , also ...JR told me you still need a receiver , any receiver with Xbus to send a signal to the infinity receiver " which the 28x, came with it" that will allow you to use all 28 channels .. all of them. As far as your cv4 goes... that's only a converter cable you can run 4 servos on one channel or any combination of channels up to 4 on that for example. you can run two aileron servos and an elevator servo and rudder but you can only have 4 channels or four servos on one channel . i hope that makes sense. in other words it doesn't add channels just function of the existing channels

warbird_1

My Feedback: (61)

sorry for all the editing . i'm not reading through my reply before sending and i did misspeak on a couple of things ,which i fixed .

Airman98

My Feedback: (9)

Warbird the 712 doesn't need to be plugged into a infinity to get 28 channel. You just run a hub off the xbus port and start plugging in harnesses.

warbird_1

My Feedback: (61)

that is true but we weren't talking about a hub in the conversation unless i missed it. just the receiver only i thought, WB_1

warbird_1

My Feedback: (61)

your right about using channel 28 on that receiver but you still,even with xbus you still only have 7 channels unless , like you said ..add a hub

warbird_1

My Feedback: (61)

ok , here's something i missed specs say 7 channels + Xbus. i have no idea what that means. it does say how many more channels you can add.

[h=3]Specifications[/h][h=4]JR - JRPR03597 - RG712BX 7CH DMSS XBus Receiver[/h]

• Type: full-range Width: 1.00 in (25.5mm)
• Channels: 7+XBus
• Modulation: DMSS
• Band: 2.4Ghz
• Height: 0.57 in (14.5mm)
• Weight: 0.53oz (15g)
• Input Voltage: 4.0–8.5V
• Case Type: hard plastic Antenna Length: 150mm
• Length: 1.87 in (47.5mm)

Airman98

My Feedback: (9)

you keep saying the 712 is a 7 channel receiver and its not. It does have 7 pwm ports but with the xbus you have all 28 channels available to you to use not just 1 to 7. Ive been using xbus since last year and own about all the dmss receivers. The 11 does not have xbus so it is limited to 11 channels.

warbird_1

My Feedback: (61)

ok , here's something i missed specs say 7 channels + Xbus. i have no idea what that means. it doesn't say how many more channels you can add.

Specifications

JR - JRPR03597 - RG712BX 7CH DMSS XBus Receiver

• Type: full-range Width: 1.00 in (25.5mm)
• Channels: 7+XBus
• Modulation: DMSS
• Band: 2.4Ghz
• Height: 0.57 in (14.5mm)
• Weight: 0.53oz (15g)
• Input Voltage: 4.0–8.5V
• Case Type: hard plastic Antenna Length: 150mm
• Length: 1.87 in (47.5mm)

warbird_1

My Feedback: (61)

so your saying that no matter what xbus receiver is used , you can access all the channels at once? I'm saying that you can only access 7 at a time in any configuration but only 7 . thus a 7 channel receiver . i have an 11 channel receiver and i'm aware that it's not xbus. if i'm wrong ,that's fine i'd like to hear how you do it , WB_1

Airman98

My Feedback: (9)

Any of the new Jr receivers that have a xbus port will be able to go to 28 channels if your radio is a 28x. The 712 is a infinity with 7 pwm ports.

Airman98

My Feedback: (9)

No if it has xbus you have access to all 28 channels. the xbus port on a 712 is the same as the xbus port on the infinity.

Airman98

My Feedback: (9)

Thats why Jr is shipping the 28 with the 712 it has 28 channels. If it would only run 7 channels what use would that be to anyone buying a 28x. I have a 731 in my jet and its running 11 channels, ;most on the xbus port.

warbird_1

My Feedback: (61)

really? then why would they call it a 7 channel? because of the 7 pwm ports? i wonder why they include with the 28X an infinity receiver and a 712 if the 712 already does 28 channels?

spike5150

No, the 7 ch Rx has 7 pwm outputs and is then expanded up to 28 ch by multiple xbus harnesses/hubs. In fact, you could also program ch 1-7 via xbus and not plug anything into the pwm ports. The 28x manual says this. When using xbus, each channel allows for the use of up to four sub-id's. That is how you get the independent adjustment of multiple servos on the same channel. I.e ch 6-1 and 6-2 for two flap servos, etc.

Jeremy

warbird_1

My Feedback: (61)

i was told that the infinity expanded the 712 to be able to use all 28 channels. that's odd

Airman98

My Feedback: (9)

The reason we are getting a infinity is because JR americas thought some would like it better and as a thank you for the people that had preordered the 28 last year. Everywhere else in the world they just get the 712. The manual never mentions the infinity only the 712. if you noticed the infinity was in a bubble wrapped package, it was put in later.

warbird_1

My Feedback: (61)

ok that makes sense . i'm not an authority on xbus,just trying to help with what i know.

jcterrettaz

My Feedback: (1)

I have a 2 7 Channel Xbus receiver RG731BX with a XB1-14 DRS 14 port PVM converter with Dual Redundancy ( 2 Life 6.6 v) in my Mirage
I use 5 channels with XBus (Ailerons, elevator and rudder) and 8 with regular port. Throttle , doors, light etc..) The XB1 -14 is great .
I bit of head scratching at first .. you really need the small XB1 -CPG : Channel programmer who make life easy.Of course with Xbus cables and convertor. When done all fine ajustement can be made with the radio, here is not with the 28X yet it's with a XG 14 Radio.