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IC-F621TR questions not covered in documentation.

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merlin

merlin

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I got my IC-F621 fixed and for heck, loaded it up with FRS/GMRS channels. That part works.
LTR and Passport are new to me, I gather just another trunking protocol.
This has option UT-108 (DTMF decoder) and wondering if this wil display MDC 1200.
A tab in programming shows displaying messages with IDs so curious if this is it.
Reason asking is our local transit is full of MDC1200 and like to ID buses that are talking.
Thanks bunches 73s
 
12dbsinad

12dbsinad

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The radio will not do MDC1200 signalling. The DTMF decoder is just that, DTMF, it will decode DTMF only.

They are good radio's, back in the LTR trunking days we sold a lot of them.
 
merlin

merlin

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Explain how it displays messages similar to MDC.
Th programming manual touches on the subject but a small paragraph.
 
12dbsinad

12dbsinad

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It will display programmed text when a matched DTMF code is received. I think it will do up to 10 codes, and If my memory serves me it's only available while in LTR mode, not conventional. It's been awhile since I've messed with one, but I am certain it does not do MDC.
 
merlin

merlin

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12dbsinad said:
It will display programmed text when a matched DTMF code is received. I think it will do up to 10 codes, and If my memory serves me it's only available while in LTR mode, not conventional. It's been awhile since I've messed with one, but I am certain it does not do MDC.
Click to expand...
Well, I see where you are right and a tad confusion on my part. Icom calls it 5-tone and in those settings can be made compatible with MDC 600, MDC 1200 as well as Ericsson's G-star. those are only in the LTR and Passport editing panels.
There is also a 2-tone sequential, great for selective calling, also available in the conventional settings.
Before Cellular, My portable phone was a GE PE with 2-tone on RCC carrier service.
My only other radio UHF with 5-tone is an M-RK scan, but haven't gotten the (G-star) to work. (disabled I think) My F4ST talks well together and it has the scrambler. (for 2-tone, that takes the 2-tone daughter card.)
Yet another F621 to repair, maybe it will be the same. I guess the messages have to be preconfigured, 32 characters that scroll.
 
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merlin

merlin

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A quick follow up. All of the DTMF features program just fine on conventional channels also.
I have work yet on the radio, it needs adjustments, especially modulation levels. Power out is 28 watts high.
A new DTMF mic sounds tinny and the tones too high. I'd like to get the up/down buttons to work, but doubt it.
So far, a neat little radio for what it is.
 
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fwradio

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The Icom Adjust software is nuts. Pretty easy to screw things up in there. I don't know how many F621TR radios I threw into the scrap trailer last year when I was cleaning out the storage building at our old office. I still keep finding those things around here in boxes.
 
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