• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

Moto radios and monitor button

Status
Not open for further replies.

vs1988

Member
Joined
Aug 12, 2005
Messages
211
I was looking at the radio control head in the ambulance on duty tonight and I noticed the monitor button. Our portables have these programmed as an option as well. When the monitor function is on the radio disables the PL so one can recieve everything on the that frequency. Does this also disable the PL for outgoing transmissions? This would make sense since the CMED frequencies are the same around the state but with different PLs depending on the EMS region.

Vince
 

Dubbin

Member
Premium Subscriber
Joined
Dec 19, 2002
Messages
4,465
Location
Findlay Ohio
vs1988 said:
I was looking at the radio control head in the ambulance on duty tonight and I noticed the monitor button. Our portables have these programmed as an option as well. When the monitor function is on the radio disables the PL so one can recieve everything on the that frequency. Does this also disable the PL for outgoing transmissions? This would make sense since the CMED frequencies are the same around the state but with different PLs depending on the EMS region.

Vince
Press it and see what happens. It could be the super secret button that opens the bat cave :D
 

CCHLLM

Member
Joined
May 10, 2003
Messages
973
Location
Greensboro, NC
In normal configurations, the monitor function affects the receive PL/DPL only. Some MotherMoto portables can be programmed for PAC-RT (vehicular repeater) functions, which allows various PAC-RT mode configurations to disable the portable's TX PL when the portable is placed in the PAC-RT mode, but that again depends upon what particualr RAC-RT configuration(s) are programmed. The mobiles capable of being the PAC-RT daddy mobile have several possible configurations also, but unless those units with that capability are specifically programmed to "strip" the PL in a particular mode, the answer is, that the TX PL is unaffected.
 

car2back

Member
Joined
Dec 19, 2004
Messages
3,010
Location
Tulsa, OK
vs1988 said:
I was looking at the radio control head in the ambulance on duty tonight and I noticed the monitor button. Our portables have these programmed as an option as well. When the monitor function is on the radio disables the PL so one can recieve everything on the that frequency. Does this also disable the PL for outgoing transmissions? This would make sense since the CMED frequencies are the same around the state but with different PLs depending on the EMS region.

Vince
We have a VHF /\/\ W7 console where I work and with the monitor option "on" it will still transmit the PL. (it will still transmit on the repeater, which requires a PL)
 
Last edited:

kb2vxa

Completely Banned for the Greater Good
Banned
Joined
Mar 22, 2005
Messages
6,126
Location
Point Pleasant Beach, N.J.
To cut a long story short, the monitor button and/or the mic hang up switch disables receive PL only when the mic is lifted. By hearing all transmissions on the frequency you won't step on another user with a different PL. This is common on shared repeaters where each user group has a different tone.
 

JnglMassiv

Member
Joined
Mar 2, 2004
Messages
853
Location
Chicago / 016
In addition to disabling PL/DPL like the others mention, it also can open the squelch. On my HTs (Sabers, GP300/350s, Astro Sabers, Jedis), the MON button sounds like static if there's no traffic on the channel.
 

Mozilla

Member
Joined
Nov 19, 2001
Messages
362
Location
South Florida
Pl

Is there a button on the head labeled MPL, thats Motorolas' designation for Multi-PL
and in certain radios can be used, when set up thru the programming to allow the user to select from a list of PLs. They can be programmed as PL encode only or PL encode and decode. Some of the mobiles, include 9000 series, MCX, Spectra, etc. Portables, included Saber series and some of the newer ones with the proper flash. Even the old syntor and MX could do multi pl, usually 7-8, by a manual selection switch with the appropriate hardware.
 
Status
Not open for further replies.
Top