DX18 / Telemetry "funny"
04-30-2013, 09:49 AM
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DX18 / Telemetry "funny"
Hi Guys,
I have telemetry modules in 3 jets (TM1000 / DX18) and in two I have no issues at all. I flew the third model today for the first time witjh the TM1000 fitted and on the DX18 and I had telemetry limits warnings. Couldn't see what they were on first flight, and when I landed there were no voltage / frame loss or holds issues.
Checked cabling and went again, this time with a spotter. Sure enough the alarm went again, and he said there were 512 frame losses - but 0 holds.
Now for the odd bit - when I landed the display showed 0 frame losses and 0 holds. Went a third time (sucker for punishment) and same thing.
Only difference in this model is that its a JR receiver and the other two models have Spektrum RXs.- all receivers are DSM2.
This model has flown many times before with a flight logger which never showed any issues.
So basically I am suspecting the TM1000, but wondered if anyone else has had the same problem.
I am a big fan of telemetry - just want it right in this model too.
Comments?
Dave
I have telemetry modules in 3 jets (TM1000 / DX18) and in two I have no issues at all. I flew the third model today for the first time witjh the TM1000 fitted and on the DX18 and I had telemetry limits warnings. Couldn't see what they were on first flight, and when I landed there were no voltage / frame loss or holds issues.
Checked cabling and went again, this time with a spotter. Sure enough the alarm went again, and he said there were 512 frame losses - but 0 holds.
Now for the odd bit - when I landed the display showed 0 frame losses and 0 holds. Went a third time (sucker for punishment) and same thing.
Only difference in this model is that its a JR receiver and the other two models have Spektrum RXs.- all receivers are DSM2.
This model has flown many times before with a flight logger which never showed any issues.
So basically I am suspecting the TM1000, but wondered if anyone else has had the same problem.
I am a big fan of telemetry - just want it right in this model too.
Comments?
Dave
04-30-2013, 05:54 PM
#2
RE: DX18 / Telemetry
Hi Dave,
I'm running a DX18/TM1000/GPS Module and an airspeed sensor thru a 12ch Spektrum Rx on my Bobcat.
i had a similar issue , on one flight it seemed I didn't have a downlink at all and I had no feedback.
The screen on the Tx didn't show a satellite lock or the TM1000 linkon the next flight
when I rebooted the system everything worked.
It's probably the TM1000 not linking to the Tx , maybe it a good idea to check before takeoff if not reboot the system
I'm running a DX18/TM1000/GPS Module and an airspeed sensor thru a 12ch Spektrum Rx on my Bobcat.
i had a similar issue , on one flight it seemed I didn't have a downlink at all and I had no feedback.
The screen on the Tx didn't show a satellite lock or the TM1000 linkon the next flight
when I rebooted the system everything worked.
It's probably the TM1000 not linking to the Tx , maybe it a good idea to check before takeoff if not reboot the system
05-01-2013, 03:24 AM
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RE: DX18 / Telemetry
Hi Xanthos,
Yep - everything was there before take off, it had an alarm in flight and showed 512 Frame Losses - a suspicious number in itself - and then after landing all was clear again - telemetry was working but just saying no holds or frame losses.
I have contacted Andy Kunz of Spektrum for comment - in the mean time have ordered another TM1000 and will route the antenna outside the fuselage to see if anything changes.
I am reasonably happy the set up is ok as this model has flown many times in the past with a flight logger - which never showed any frame losses.
The 512 makes me think its an overflow of some sort...
Dave
Dave
Yep - everything was there before take off, it had an alarm in flight and showed 512 Frame Losses - a suspicious number in itself - and then after landing all was clear again - telemetry was working but just saying no holds or frame losses.
I have contacted Andy Kunz of Spektrum for comment - in the mean time have ordered another TM1000 and will route the antenna outside the fuselage to see if anything changes.
I am reasonably happy the set up is ok as this model has flown many times in the past with a flight logger - which never showed any frame losses.
The 512 makes me think its an overflow of some sort...
Dave
Dave
05-01-2013, 04:51 AM
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RE: DX18 / Telemetry
Herewith reply from Andy Kunz - so helpful
Hi Dave,
The alarm was telling you that the TM1000 was having trouble hearing the transmitter. This is normal, it's a Telemetry Range Warning.
You can try to reposition the telemetry antenna, but it will ALWAYS have less range performance than your control system, by design.
Andy
The alarm was telling you that the TM1000 was having trouble hearing the transmitter. This is normal, it's a Telemetry Range Warning.
You can try to reposition the telemetry antenna, but it will ALWAYS have less range performance than your control system, by design.
Andy
