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APX conventional TPT?

billy2047

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well its here with version 31 firmware with some limitations. It only works on a repeater channel, not available on talkaround, and if you have the talk permit tone enabled on the astro personality, it will "bonk" you if you are out of range of the repeater, just like a trunked system.
will check it out thanks! could you tell if the TPT is gonna be single beep? triple beep like trunking? or something else?
 

billy2047

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what if I use DVRS and TX in the clear? would TPT become super long like: di di di, di di di, di :p
 

SCFDCOMM

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Hi all,
i'm trying to program several APX8000s operating on encrypted conventional P25 mode.

I'm trying to get the radio to emit a TPT (tone doesn't have to be fancy and single short beep also works) while using encryption. (Users complaint no audible feedback when PTT button is pressed).

TX Cleart Alert tone doesn't work on encrypted conventional talkgroups so that is out of the equation.

Any suggestions would be appreciated

BB
Have exact same requirement.
I cant get it to function, will revisit it after taking eyes off screen for while.

I tried this on two p25 conv repeaters, one running secure and one clear. Upgraded CPS 31.00.01 and fw to r30.04.00
Aside from selecting the Talk Permit Tone checkbox, did you have to make any other adjustments. Radio is transmitting fine but no TPT

From the Help File in CPS, (When this field is enabled, the repeater's drop out delay must be enabled with the delay set to at least 1 s.)
ruled this out as hang time is over that amount.

Any ideas
 

KevinC

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Have exact same requirement.
I cant get it to function, will revisit it after taking eyes off screen for while.

I tried this on two p25 conv repeaters, one running secure and one clear. Upgraded CPS 31.00.01 and fw to r30.04.00
Aside from selecting the Talk Permit Tone checkbox, did you have to make any other adjustments. Radio is transmitting fine but no TPT

From the Help File in CPS, (When this field is enabled, the repeater's drop out delay must be enabled with the delay set to at least 1 s.)
ruled this out as hang time is over that amount.

Any ideas
Are the repeaters drop out delays set to at least 1 second? If not it won't work.

And yes, just check the box.
 

SCFDCOMM

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Yes they are. I will try a different radio. I have to be missing something or there may be something that is conflicting
 

crazyboy

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Have exact same requirement.
I cant get it to function, will revisit it after taking eyes off screen for while.

I tried this on two p25 conv repeaters, one running secure and one clear. Upgraded CPS 31.00.01 and fw to r30.04.00
Aside from selecting the Talk Permit Tone checkbox, did you have to make any other adjustments. Radio is transmitting fine but no TPT

From the Help File in CPS, (When this field is enabled, the repeater's drop out delay must be enabled with the delay set to at least 1 s.)
ruled this out as hang time is over that amount.

Any ideas

Upgrade firmware to R31.00.01, conventional TPT did not exist in R30.
 

SCFDCOMM

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I only see

APX Family Portables and Mobiles FW R31.00.00 2023.2 Feature Release on myview. I'll double check, thanks though
 

SCFDCOMM

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Thanks, Been busy on a ton of projects and loaded one FW level below what was needed. The new CPS showed me the TPT checkbox, and it didnt error out. However when testing there was no TPT. With the next FW step I just did it indeed works. Crazy I missed that. Appreciate it
 

KevinC

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Before everyone gets whacker happy thinking they can have the radio sound a TPT whenever they key up...it only works on P25 repeaters, and the radio must receive the hang time carrier (at least 1 full second) before it will actually sound the TPT, otherwise you get bonked. It does not work on analog repeaters or simplex.
At least it’s actually useful. As opposed to just a feel good tone when you PTT.

Poor man’s coverage test also. ;)
 

tmahoney748

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In testing the radio transmits a P25 TSDU; waits to hear the repeater come up with a TDU tail stream, and if it does gives positive TPT and begins normal conventional voice. If it doesn't detect the repeater come up with a TDU tail stream, you pretty much immediately get the negative TPT bonk.
I’m testing this feature on a tester radio on a 5 site public safety system. I keep getting bonked in areas of town where without the feature I would be able to transmit and be heard with no issue. Unless I’m out in the open pretty close to a repeater site it seems to take a few tries to get the TPT and be able to transmit. Do you think there are settings in CPS that would help get more successful access? I’ve tried increasing preamble length thinking that would do it but it did not. For now, the feature is disabled on all frontline radios.
 

KevinC

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I’m testing this feature on a tester radio on a 5 site public safety system. I keep getting bonked in areas of town where without the feature I would be able to transmit and be heard with no issue. Unless I’m out in the open pretty close to a repeater site it seems to take a few tries to get the TPT and be able to transmit. Do you think there are settings in CPS that would help get more successful access? I’ve tried increasing preamble length thinking that would do it but it did not. For now, the feature is disabled on all frontline radios.
What's the repeater hangtime set to?
 

wgbecks

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I’m testing this feature on a tester radio on a 5 site public safety system. I keep getting bonked in areas of town where without the feature I would be able to transmit and be heard with no issue. Unless I’m out in the open pretty close to a repeater site it seems to take a few tries to get the TPT and be able to transmit. Do you think there are settings in CPS that would help get more successful access? I’ve tried increasing preamble length thinking that would do it but it did not. For now, the feature is disabled on all frontline radios.
What's the repeater hangtime set to?

In addition to checking repeater hangtime, it's possible that the preamble length of your defined conventional system is a little short
in duration. I want to recall the APX defaults to 80 or (80 x 0.2083) 16.66 ms in length for conventional systems and 120 (120 x 0.2083)
or about 25 ms for trunking systems.

Prior to enabling TPT, you would have simply keyed the radio and began speaking that presumably would have provided a long enough interval for the system to sync up and begin repeating your transmission. With TPT enabled, the transmission is shorter as it's interrupted
while the SU's receiver is looking for the handshake so to speak. It won't hurt to bump it up for a test.
 
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