Section 4
Operation
27
4
Operation
Once installed, operating the Loudmouth
®
radio receiver requires no human contact.
Portable, base station or mobile 2-way radios can deliver voice messages to a PA speaker
with a simple press of the PTT button for either live or recorded playback. This section
describes the subtle differences in operation for various Loudmouth
®
options and
installations.
4.1
Basic Operation
Basic operation is defined as a Loudmouth
®
receiver programmed on a dedicated radio frequency with a QC or DQC code.
The receiver is also programmed for 50% volume and a pre-announce tone.
1. Move to an area that is away from the Loudmouth
®
speaker to prevent feedback.
2. Be sure the microphone on the calling radio is pointed away from the Loudmouth
®
speaker.
3. Set the portable, base station, or mobile radio to the Loudmouth
®
channel.
4. Monitor the channel before transmitting to be sure there are no other radio users on the Loudmouth
®
frequency.
5. Press and hold the PTT button and pause for about 1 second, allowing the pre-announce tone to be heard.
6. Speak into the radio microphone to broadcast your message over the Loudmouth
®
speaker. If other radios are operating
on the Loudmouth
®
channel they will also hear your message.
7. Release the PTT button when your message is complete.
8. Return the portable, base station, or mobile radio to the normal operating channel.
4.2
DTMF and Selcall Paging
To access the Loudmouth
®
the 2-way radio must first send the correct DTMF or Selcall code. Once access to the loudspeaker
is accomplished, the user simply presses the 2-
way radio’s PTT and speaks while on the Loudmouth
®
channel. After a period
of inactivity the Loudmouth
®
will automatically reset, and will then require the correct DTMF or Selcall code to re-gain access.
1. Move to an area that is away from the Loudmouth
®
speaker to prevent feedback.
2. Be sure the microphone on the calling radio is pointed away from the Loudmouth
®
speaker.
3. Set the portable, base station, or mobile radio to the Loudmouth
®
channel.
4. Monitor the channel before transmitting to be sure there are no other radio users on the Loudmouth
®
frequency.
5. Press and hold the PTT button.
6. Wait until the entire DTMF or Selcall code has been sent, and then an additional 1 second for the pre-announce tone.
7. Speak into the radio microphone to broadcast your message over the Loudmouth
®
speaker. If other radios are operating
on the Loudmouth
®
channel they will also hear your message.
8. Release the PTT button when your message is complete.
9. Return the portable, base station, or mobile radio to the normal operating channel.
With DTMF or Selcall Paging operation:
Once Loudmouth
®
receiver has decoded the correct DTMF or Selcall code any radio on the Loudmouth
®
channel
can talk over the speaker without the need for DTMF or Selcall paging.
After a DTMF or Selcall code has been successfully decoded, the programmable Paging Reset Time sets the length
of time the Loudmouth
®
receiver can go without receiving a signal before DTMF or Selcall is once again required for
access. Factory default Paging Reset Time is 10 seconds.
DTMF or Selcall paging can be used in conjunction with QC or DQC for added security. The 2-way radio and the
Loudmouth
®
receiver must be programmed for the same QC or DQC code
.
