Disable TX on Trunking System

trev_ca · Post by **trev_ca** » Thu Jun 24, 2004 5:35 pm

[moderated]

kc8yhk · Post by **kc8yhk** » Fri Jun 25, 2004 12:16 am

deleting all my comments

Chato · Post by **Chato** » Fri Jun 25, 2004 1:31 am

Try to reprogram the radio with an invalid radio ID for whatever system you will be using it on. (If you know of one and/or can 'find' one) If it's a Motorola type II, you should still be able to listen (like a scanner), but if you attemt to transmit, the system will reject you.

In addition to that, you can take the 'plunger' out of the PTT switch, as I have done to my ASTRO Saber. After doing so, there is no way you will be able to TX on any talkgroup.

~Chad

EKLB · Post by **EKLB** » Fri Jun 25, 2004 2:11 am

I dont recall seeing the radio type or model number mentioned.

But most of the time if you wanted the tx to be disabled on mootorolas other radio types = You simply remove the tx freq and type in the word BLANK.

This disables the tx but allows rx .

EKLB

Victor Xray · Post by **Victor Xray** » Fri Jun 25, 2004 3:16 am

trev_ca wrote:On the concentric switch I selected TX inhibit for both positions.

You can't assign BOTH positions of the concentric switch to TxInh, it cancels the feature out. You should also consider removing the PTT plunger, or use Lab to assign the PTT to something else.

OX · Post by OX » Fri Jun 25, 2004 3:19 am

EZ fix. Program TX_Inhibit to only one position. When you program the same function to multiple positions, it cancels each other out.

Here's why:
Switch3 has two positions, 0 and 1. When you program a function to position zero, the logical expression is:
if switch3_pos=0 then function_on else function_off

So where you've programmed the same function to two positions on the concentric switch, you end up with these two logical expressions running at the same time fighting against each other:
if switch3_pos=0 then function_on else function_off
if switch3_pos=1 then function_on else function_off

This may not be the exact expression and variables but good enough for example. I sugggest program it to one position, switch to that position and remove the concentric knob altogether. FOrget the invalid ID crap as the radio will still transmit even though it gets NACKd.

trev_ca · Post by **trev_ca** » Fri Jun 25, 2004 4:07 am

[moderated]

yoda · Post by **yoda** » Fri Jun 25, 2004 4:40 am

I use an XTS3000, and you most certainly can program both positions on the concentric switch to TX Inhibit, and it will work fine, as long as you only have trunked groups programmed in. I have noticed a 'bug' when you also have conventional channels that you transmit on.

If you listen only to trunked groups, TX Inhibit will stay active forever. However, if you switch to a conventional channel, transmit, and then switch back to a trunked group, the radio will allow transmit. As long as you don't introduce the conventional channel into the mix, TX Inhibit will stay on. Go figure...

OX · Post by OX » Fri Jun 25, 2004 10:45 pm

yoda wrote:I use an XTS3000, and you most certainly can program both positions on the concentric switch to TX Inhibit, and it will work fine, as long as you only have trunked groups programmed in.

May be true on the XTS, but on the MTX/MTS, programming the same function to multiple positions DOES render the function useless. The RSS even says so.

I dont recall seeing the radio type or model number mentioned.

Me neither. Just made the assumption based on the function.

As for your dilemma, program the conc. switch with TX_INHIBIT to one position and keep it there. When you switch to conventional and need to TX, switch it back.

The only radio that I know of that allows for a mode to be set as receive only is the Spectra. The XTS might, but I have no need for an expensive toy like that so I can't say for sure.

trev_ca · Post by **trev_ca** » Sat Jun 26, 2004 6:30 am

[moderated]

olepro1 · Post by **olepro1** » Sat Jun 26, 2004 9:03 am

well let us know what you found. it would be nice to know.

thanks jimmy

JustinMoon205 · Post by **JustinMoon205** » Sun Jun 27, 2004 1:53 pm

The way I have my MTS2000 set-up is that one position of the concentric switch is set to "Tx Inhibit" and the other is set for "Scan List Program". The radio will not transmit while in the "Scan List Program". This works well for me.

-Justin

Code636 · Post by **Code636** » Sun Jun 27, 2004 8:54 pm

true...but then how are you going to TX on your conv. chl? personnaly..id set up con switch for TX inhibit...and a side button or the a/b/c switch for the scan prog...
but if you dont need to tx...ingenious solution i say...

trev_ca · Post by **trev_ca** » Mon Jun 28, 2004 9:09 am

[moderated]

JustinMoon205 · Post by **JustinMoon205** » Mon Jun 28, 2004 11:49 am

Code636, if you program the concentric switch for the same position being Tx inhibit in both the Conventional mode and the Trunked mode, and then the opposite position for BLANK in conventional and Scan List Program in Trunked mode then it will allow you to transmit on your conventional channels.

The method that trev_ca mentioned also works well. I have done a radio that was before also.

--Justin

Disable TX on Trunking System

Disable TX on Trunking System

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