Techniques > Radios
Telemetry Transmitters
Fergal Gordon:
Hi Alan,
Yes you are right, the Tx battery warning level should be set to about 7.2 V. However, this is not the issue in question. My Tx also displays the Rx battery voltage (M-Link telemetry) and the Tx also gives an audible warning if the Rx battery is low. I start getting these warnings when the Rx battery still has 80 to 90% of its charge.
It would appear that although the warning is made by the Tx, the threshold is set in the Rx. And this would make sense, as each model would have its own threshold, depending on the battery configuration and the current draw. The other logical place for this setting would be in the model menu of the Tx. However, there is no such setting there.
The solution is to get a MultiMate and use it to program the Rx with the appropriate settings. The MultiMate got a good review in the February edition of RC Model World magazine. Hopefully, this will do the trick.
Best regards,
Fergal
Fergal Gordon:
Hi Everyone,
I just got to the bottom the problem with Rx battery level warning. As mentioned before, I was getting Rx battery low warnings after about 20 min flying time. The problem has turned out to be a faulty on/off switch.
I have fitted a new switch and have had about 1.5 hours flying before a got a low level warning. This is more realistic.
I appear to have had a bad contact and was probably switching off momentarily and dropping the voltage level. Luckily, the plane did not switch off completely in the air. It looks like the upgrade to M-Link system has paid for itself.
Best regards,
Fergal.
Happy Days:
Occam's razor;......
“All other things being equal, generally the simplest solution is the correct one!”
At least you got to the bottom of the matter Fergal. :clap:
Alan_Perse:
Good to hear you got it sorted Fergal. Have you fixed your gliders yet?
Fergal Gordon:
Hi Keith,
Don't forget KISS and the parsimony principle!
Fergal
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