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Old Dec 13, 2014, 01:22 PM
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Absolutely positively do not do that!
DC power is not the same as Rf power.

No, there is no way to cobble together a way to test the power meter's accuracy.
You'd need to use a much more expensive piece of equipment to make comparative measurements.
This meter exists for that very reason. That it used to cost several thousand
dollars to measure Rf power.

As I've said to you before, this meter is not about absolute accuracy, but
works well for comparisons between different gear and various modes
and channels and such.

Anyway, since this is the RL thread, not the IMRC power meter, thread, should
focus on your results. Yes the power output of your Tx sounds ok, but the symptoms
you're experiencing in the air, still indicate a problem. Next I'd look at your
Rx antenna to make sure that you have continuity between center pin, and the
tip of the active element (may need to strip off a tiny bit of insulation to expose
the tip). If that's fine, then go back to looking for sources of noise
onboard the aircraft. I think you said you did a micro power range test
with just Rx and battery, but don't recall if you said what the micro-power
range was, with everything else powered up.
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Last edited by Daemon; Dec 13, 2014 at 01:30 PM.
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Old Dec 13, 2014, 08:45 PM
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Thanks for the advice. As you say, consistency is the watch word for the IMRC Meter -- if it happens to be objectively precise, so much the better.

Next up will be to swap in another antenna and do some bench work on the current one -- cut it open and check out the contact.

I did not perform an orthodox micro power mode test on this RX before building. Rather I did a low power field test on the ground, with stock antenna and one servo only. I tested with clean results up to 5km on the ground and decided that was good enough.

If I don't get more range out of the existing RX unit, I'll pull it off and start over, doing a micro power test on it to then compare with results when installed.

Either way, at least the TX is provisionally cleared.
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Old Dec 13, 2014, 09:39 PM
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Lakewood, Colorado
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The micro-power range test is one of the most useful tools in your arsenal.
I don't just say this over and over because I like reading my own words. I've owned and
used about 6 different UHF systems and fought range and interference issues with
all of them at one time or another. A true micro-power range test (which many don't have)
is extremely useful for diagnosing these type of problems and it's one of
the reasons I recommend Rangelink over several of the others.
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Old Dec 15, 2014, 03:38 AM
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India, KA, Bengaluru
Joined Feb 2014
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Hi all, need urgent help. Got new range link system.
Binding procedure followed from manual.

RX Turned Off
Tx on Low Mode
Hold Bind Button
Switch on TX
Wait till loud beep ,
after first beep, release the MODE button
LED of the Rx will be light up solid
.Turn the Tx and Rx power off. Power both on again

Both tx and Rx led flash rapidly after binding .
tx is 9xr mode 2

Please help .... is it ok the LED's flash rapidly ..?
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Last edited by arun21; Dec 15, 2014 at 03:44 AM. Reason: update
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Old Dec 15, 2014, 03:44 AM
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Yes, that's normal.
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Old Dec 15, 2014, 09:07 AM
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arun21, when you are running your RL, observe the rapidly flashing red lights.

Once in a while you will get a poor connection on start up. The sevos for example will move in a rough or notchy fashion. When that happens, you will see the red lights flashing in a disturbed pattern, meaning not steady rapid pulse. Meaning you can see connection quality in that flashing. If so, just restart battery.
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