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Old Nov 14, 2009, 05:50 PM
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Creteil, France
Joined Nov 2003
474 Posts
R136hp rssi

So as you can see on attached pictures, TA7761 on one side so RSSI on pin7 and FP6302B on the other so RSSI also there (see some ealier posts).

Which side do you recommend to pickup the signal to feed ET OSD Pro?
(In either case I guess that a buffer will be needed).

Vincent
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Last edited by vpersiani; Nov 14, 2009 at 05:56 PM. Reason: forgot attachments!
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Old Nov 14, 2009, 07:17 PM
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Argentina, Capital Federal, Buenos Aires
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Does anyone know how to obtain RSSI signal on a JR R2100 receiver?

Thanks!
Gustavo
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Old Nov 14, 2009, 10:43 PM
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Canada,Quebec
Joined Jan 2005
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For infos, the RSSI on XPS system is the pin #6 on the xbee pro module.
Take note that it's a PWM of 64uS period, when 24% is on you're at rx's sensibility.

You can add a 100kohm res. and a 10uf cap to filter it into 1-3.6V signal.

-Hugo
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Old Nov 15, 2009, 04:29 AM
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Sydney, Australia
Joined Nov 2007
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Anything on jr rx's spcm
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Old Nov 16, 2009, 05:12 AM
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Joined Dec 2003
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I found the RSSI pin for FMA co-pilot FS8 receiver.

It is on the 2292 IC on the back of the receiver.

Here's the datasheet
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Old Nov 17, 2009, 11:26 AM
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Joined Sep 2005
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RSSI capture for Multiplex RX-12Synth DS IPD and Multiplex RX-9Synth DS IPD

The IC its Philips SA676 and RSSI its on pin 5.

Here is the data sheet http://www.datasheetcatalog.com/data.../7/SA676.shtml

Alex

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Old Nov 23, 2009, 11:57 PM
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Canada, AB, Calgary
Joined Dec 2008
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Hi guys,

any one know where is the RSSI for R3110DPS futaba receiver.... thanks
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Old Dec 25, 2009, 02:38 PM
Tesla's Workshop
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USA, CA, Torrance
Joined Nov 2004
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Jr r2000 & r2100

I found the 31136 chip on the JR R2000 series of receivers...

It is sandwiched between two PCBs and unreachable...

Jeff
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Old Dec 25, 2009, 02:40 PM
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Romania, Dolj, Craiova
Joined Sep 2007
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Try to follow the track from pin7
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Old Dec 25, 2009, 02:43 PM
Tesla's Workshop
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It is a multi layered board and the bottom is a solid copper trace...

Desoldering the top board would be a chore for someone with my skills.

I'm going to look at the other JR ScanSelect SPCM receivers to see if I can find a single layer board.
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Old Dec 26, 2009, 08:08 AM
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Hi,
does anyone knows where is the RSSI pin on a futaba fasst R6014?
tnks!
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Old Dec 26, 2009, 11:59 AM
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Danmark, Hovedstaden, Ballerup
Joined May 2007
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this folder may contain usefull info
http://www.webx.dk/rc/RX-measurements/
I took also RF measurements and DC supply rejection and IF filter width measurements
see the HTML file in the main folder,
you will also see alot of closeup pictures.
most receivers use the same radio chips, so that is actually what you need to google.
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Old Dec 26, 2009, 01:55 PM
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No JR on the list... I wonder why so many FPVers seem to choose other radios?...
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Old Dec 26, 2009, 09:21 PM
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Jr r790

I found the chip! It was unmarked and hiding under a capacitor!

I love this seven channel scan select SPCM receiver and use it on all my >1mile machines. It is really too bad the pin is so inaccessible. I fished around on both side of the board looking for a better attachment point but, alas, I could not find one.

No Signal = .205V
Full Signal = .618V

Cool. Now I have to learn how to solder to that tiny pin!
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Old Dec 27, 2009, 02:19 AM
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Romania, Dolj, Craiova
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The voltage swing is too small, imo, for a healthy RSSI indication.
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