MTS2000 - strong SQL plop. Please help.

wireless.friendly · Post by **wireless.friendly** » Sat Jul 29, 2006 2:06 am

Hi all!

My MTS2000 has a noisy, hoarse, relatively long and strong squelch plop:

You can listen here (tested on channel with PL on RX): http://www.bestsharing.com/files/ms0018 ... r.mp3.html (right corner, just press Download file).

This is first my radio, which has so strong and long squelch plop. Very annoy me!!!

Any ideas?

P.S.
MTS2000 details: R05.60, H01RDD9PW1BN, 000001-000000-9.

Rick Rock · Post by **Rick Rock** » Sun Jul 30, 2006 8:27 am

Is your receive freq. set to CSQ? That sounds like a typical jedi squelchtail on carrier squelch. Also, what's your receive hang time set to?

wireless.friendly · Post by **wireless.friendly** » Sun Jul 30, 2006 9:51 am

freq. set to CSQ?

I try both. CSQ and PL. No visible differences.

That sounds like a typical jedi squelchtail on carrier squelch.

I also already got info from some technician that this is hard reality named "JEDI"

Also, what's your receive hang time set to?

Try 0 and 1 (100 ms). No visible differences.

Chris · Post by **Chris** » Sun Jul 30, 2006 3:31 pm

Normal.

n7maq · Post by **n7maq** » Sun Jul 30, 2006 4:24 pm

Check your mute/unmute type.

Jim.

Rayjk110 · Post by **Rayjk110** » Sun Jul 30, 2006 5:48 pm

It coult be the radio TX'ing is using the non-standard reverse burst/turn off code. Common on overseas ie icom yaesu, and kenwood radios that don't TX the proper turnoff code.

Rick Rock · Post by **Rick Rock** » Sun Jul 30, 2006 9:46 pm

Make sure muting is set to only unmute on proper tone as Jim stated...

wireless.friendly · Post by **wireless.friendly** » Mon Jul 31, 2006 12:21 am

n7maq wrote:Check your mute/unmute type.

Jim.

I try Standard and default position (don't remember which exact, but variant described as default in RSS manual).

No visible differences if I on channel with SQL as CSQ.

Later can try others.

wireless.friendly · Post by **wireless.friendly** » Mon Jul 31, 2006 12:26 am

Rayjk110 wrote:It coult be the radio TX'ing is using the non-standard reverse burst/turn off code. Common on overseas ie icom yaesu, and kenwood radios that don't TX the proper turnoff code.

I do not use turn-off code (aka reverse burst) on transmiter, because I want listen many channels, which just doesn't have turn-off code or PL/DPL!

I want to got short SQL plop on clear carrier (no PL/DPL!).

Rick Rock · Post by **Rick Rock** » Mon Jul 31, 2006 12:27 am

GOOD LUCK! PL decoding is the only thing that will render that squelch tail silent.

wireless.friendly · Post by **wireless.friendly** » Mon Jul 31, 2006 1:01 am

Rick Rock wrote:GOOD LUCK! PL decoding is the only thing that will render that squelch tail silent.

I asking about decreasing plop duration and/or strength. I am not asking about make it completely silent - I am not kid and know something about two-way radio.

Just this radio have most long ang strength plop relatively to other Moto, Kenwood and other radios. For e.g. Moto WARIS's plop sounds much better - no so strong, shortly and always have the same duration (MTS2000'phop have variable duration).

MTS2000des · Post by **MTS2000des** » Mon Jul 31, 2006 11:26 pm

the Jedi's have a different hysteresis on squelch than other series. You're gonna have to learn to live with it, or enable PL/DPL decoding on the channels/modes that are most offensive.

You may try adjusting the squelch values in tuner to higher levels, but this may not let you hear signals when they are weak. always record the old softpots before making adjustments, especially if you lack a service monitor handy to do a full proper alignment.

wireless.friendly · Post by **wireless.friendly** » Wed Aug 02, 2006 10:11 am

MTS2000des wrote:the Jedi's have a different hysteresis on squelch than other series. You're gonna have to learn to live with it, or enable PL/DPL decoding on the channels/modes that are most offensive.

You may try adjusting the squelch values in tuner to higher levels, but this may not let you hear signals when they are weak. always record the old softpots before making adjustments, especially if you lack a service monitor handy to do a full proper alignment.

Thanks.

But what mean these modes in service mode (after pressing side button 5 times and would be passed model number, flash code info & etc.):

1 CSQ
1 TPL
1 DPL
1 TLS
1 THS
1 DTM
1 MI2
1 SEC

I can adjust something or this is just for information?

May be some guide exist - how works with radio service mode by pressing keys?

Rayjk110 · Post by **Rayjk110** » Wed Aug 02, 2006 10:26 am

It puts the radio in test mode, so when the radio is 'on the bench' or being tested at a service monitor, it can quickly be tested for PL/DPL/etc modulation and functionality. You really can't change the squelch values at all in test mode. You can only test func. of a range of pre-set test freq's and tone deviation and button functionality.

wireless.friendly · Post by **wireless.friendly** » Sun Sep 10, 2006 1:30 pm

Rayjk110

Ok, thanks!

AEC · Post by **AEC** » Sun Sep 10, 2006 6:44 pm

You should be able to set the muting type from 'AND' to 'OR', this does affect the squelch action and if one radio is set to 'AND' muting, and the second is set to 'OR' muting, you'll hear the noise.

wireless.friendly · Post by **wireless.friendly** » Mon Sep 11, 2006 2:27 am

I make few experiments with two JEDI radios and find out that:

JEDI have long and strong squelch plop if receiver NOT closed on PL, but TX carrier contains PL.

In other combinations (TX carrier w/o PL; RX on CSQ [i.e. not closed on PL]), plop shorter/smaller, what more acceptable for me.

This is not a bug, this is JEDI "feature" %)