I think Eric and I said exactly the same thing, but my explanation was looking
into the radio while Eric's was looking at the business end of the cable.
I would NOT recommend any RIB-less cable. Most are powered by the serial port,
and some RSS programs don't activate the proper handshaking lines to power the
electronics, so it won't work. Other units have the ability to be powered
externally; these usually WILL work properly.
I'd suggest you try the following experiment:
1. with nothing plugged into the MIC jack, turn the radio on.
2. unplug the RIB cable from everything.
3. plug the RJ45 end of the RIB cable into the radio. NOTHING SHOULD HAPPEN. If
the radio transmits at this point, your RIB cable is defective as it's
grounding the PTT line. It could also be a short at the RJ45 connector.
4. make sure the RIB is turned off.
5. plug the DB25 end of the RIB cable into the RIB. NOTHING SHOULD HAPPEN. If
the radio transmits at this point, you've got more than two wires connected on
your RIB cable, including PTT.
6. turn the RIB on. NOTHING SHOULD HAPPEN. If the radio transmits at this
point, then you've still got more than two wires connected in your RIB cable.
PTT is on pin 6, which is right next to the programming line on pin 7. Verify
the wire colors. Use an ohm-meter to make sure you're only using pins 4 and 7
in your RIB cable and make sure pin 6 doesn't go to anything.
Bob M.
======
--- On Fri, 2/6/09, Jeff Clark <je...@cruzio.com> wrote:
From: Jeff Clark <je...@cruzio.com>
Subject: Re: [Repeater-Builder] M1225 programming problem
To: Repeater-Builder@yahoogroups.com
Date: Friday, February 6, 2009, 9:22 PM
Thanks to Bob and Eric for the quick responses. Their descriptions match the
batlabs diagram exactly. I've checked everything again, but still have the same
problem with the PTT going active, even when powered up in the sequence
recommended by Bob :-( I may have to break down and buy one of those rib-less
cables on ebay afterall.
--jeff
At 04:20 PM 2/6/2009, Bob M. wrote:
When you are plugging an RJ45 connector into the MIC jack, the tab will either
be on the right or on the bottom. If it's on the right, the uppermost pin is
#1. If the tab is on the bottom, the rightmost pin is #1. If the MIC jack is
oriented some other way, make the appropriate adjustments. Note that this pin
numbering may not match any other cable you have, but that's the way Motorola
numbers them for a lot of their radios and the pin numbers given below
correspond to this orientation.
Ground is pin 4. The programming line is pin 7. Those are the only two wires
you need for programming purposes. If you crimped all 8 wires into the RJ45
connector, check the other wires at the other end of the cable and make sure
they're all clearly insulated and not attached to anything.
Also, make sure you connect the cable to the RIB and power up the RIB before
plugging the RJ45 connector into the radio. The radio can be turned on before
or after you plug the RIB cable into it.
Bob M.
======
--- On Thu, 2/5/09, Jeff Clark <je...@cruzio.com> wrote:
> From: Jeff Clark <je...@cruzio.com>
> Subject: [Repeater-Builder] M1225 programming problem
> To: Repeater-Builder@yahoogroups.com
> Date: Thursday, February 5, 2009, 9:22 PM
> Hope this is the correct group for this kind of question.
> I'm trying
> to program two m1225 UHF mobiles with a Polaris PA-II rib
> and a cable
> assembled per the batlabs cable page (listed same as
> GM300). I've
> checked and double checked the connections on both ends and
> made sure
> the tab on the rj45 end is oriented according to the
> diagram, but
> when I plug it in to the mic jack and turn on the rib, the
> radio keys
> up and stays keyed until I kill the power or pull the plug.
>
> I've tried this on both radios with the same result,
> and I've
> programmed my P1225s with the same rib, so I'm
> wondering if the
> pinout on the rj45 jack is wrong. Are there additional
> pinouts beside
> the one listed on the batlabs page?
>
> thanks,
>
> --jeff, kf6bkg
