Zetron model 38A

MotoTech · Post by **MotoTech** » Sat Oct 02, 2004 10:35 am

I need to know if there is a way for a Zetron Model 38A to do a fixed (not Temporary)Cross-Tone! I want to cross different ctcss's. no dpl. to be used all the time, I am putting two repeaters up in different location's on the same RX tones but different TX tones. on the same frequencies.

nmfire10 · Post by **nmfire10** » Sat Oct 02, 2004 11:17 am

What. are you talking. about?,

Post by **HumHead** » Sat Oct 02, 2004 11:37 am

Actually, that's fairly clear- the poor man's voting system!

It's not a problem with the 38A. You can easily specify different tones for input and output in the programming. I also use the feature (along with the auxiliary relay option) to selectively enable sending audio out on an auxiliary link.

If programming by DTMF it's command 89 used as 89#uu#xxxx Where uu=the user number for the receive tone you want to use and xxxx = the output tone that you want to use. Selections for output tone are 0=CSQ, 1-50 = TPL tone expressed as a user number and DPL = 1xxx with the DPL in place of the "x"s.

If programming by terminal, it's available as a menu item under user programming.

Here's a trick I found- I disable Tone encode during TX hold time and then enable the courtesy tail blip on only one of the input tones (users). You will only hear the blip if you put your radio into CSQ monitor. It's a good quick way to determine which input tone is being used to bring up the repeater(s). Just press the monitor button at the end of a transmission and see if the beep is there or not.

MotoTech · Post by **MotoTech** » Sat Oct 02, 2004 1:29 pm

Thanks for the clues! I know I posted the message right! I had to read it several times after that first reply!

Yes it is a poor man voting system! these guys have linited money anf equipment.

Thanks again for the detailed info.

M

nmfire10 · Post by **nmfire10** » Sat Oct 02, 2004 2:43 pm

That is backwards from the poor man's voting. You should be having different RX tones and the same TX tone on the repeaters. For example, a mobile transmitting with 103.5 will go through repeater #1. A mobile transmitting with 110.9 will go through repeater #2. Both repeaters should have the same output PL of say 203.5.

If both repeaters have different PL outputs but the same PL input, they will both try to repeat at the same time and you won't hear anything but heterodyning garbage.

Post by **HumHead** » Sat Oct 02, 2004 2:59 pm

Matt, I see your point. I initially read it as different input tones, same output tone.

If MotoTech actually meant same input PL and different output PLs, then Matt is right on target with his concerns.

MotoTech · Post by **MotoTech** » Sat Oct 02, 2004 6:25 pm

Lets see If I can explain better

Repeater 1- Tx on 460.000 pl 203.5 Rx on 465.000 PL 123.0
Repeater 2- Tx on 460.000 pl 203.5 Rx on 465.000 PL 203.5

Mobile 1- Tx on 465.000 Pl 123.0 Rx on 460.000 PL 203.5
Mobile 2- Tx on 465.000 Pl 203.5 Rx on 460.000 PL 203.5

nmfire10 · Post by **nmfire10** » Sat Oct 02, 2004 7:10 pm

That's correct. Your original post had it backwards. What do you need a multi-tone panel for though?? The TX and RX PL tones are programable on the repeaters without an external box.

MotoTech · Post by **MotoTech** » Sun Oct 03, 2004 11:12 am

It's easier to turn off. if the customer doesn't pay, or if there is a a problem, also easier than trying to buy reeds for older machines..

M

raymond345 · Post by **raymond345** » Sat Oct 30, 2004 9:50 am

Yes a number of zetron 48max are set up
for different rx inputs and the same tone output.
They use it(Repeater)as a semi duplex phone patch.

They control more paying customers this way.

They use phone line access to turn tones off and on.

Zetron model 38A

Zetron model 38A

zetron 38

zetron 38

zetron 38.

Zetron 48max