3. Operation
3.1 Power ON
Operation is as easy as plugging in the speaker. Speaker will turn on automatically about 30 seconds
AFTER they are plugged into your power source (AC110V), at which point a bell chime will sound as
the speaker has powered on and entered “Stand-by Mode”. The switch on the bottom of the MDS-
1400/2400 rectangle or side of the MDS-3400 circle speaker is used to turn on/off only the back-up
battery. Leave this switch in the “ON” position so that the battery charges during use unless you need
to turn off the battery for transport. Each speaker will stay on & be ready to receive until the speaker is
unplugged or the backup battery is drained.
3.2 Volume Control
Volume for the speaker itself is pre-set by the speaker’s PC programmer through the PC Programming
Dongle, or can be adjusted over the air with a Maxon MDP-6424 portable radio. (Contact your local
Maxon dealer for more information)
3.3 How it works
Each MDS Series speaker is a UHF band “Receive-only” DMR Tier II digital radio. Your two-way radios
and the MDS speaker need to be programmed to be on the same UHF band radio frequency and Color
Code before using (Contact your local Maxon dealer for programming help). Once both the portable
radio and the speaker are programmed, the user transmits audio to the speaker by talking clearly and
loudly through the portable radio (press and hold PTT button on the portable radio while talking). Audio
will broadcast through the wireless speaker as the portable radio transmits to the speaker and the sound
will turn off when the user stops transmitting (release PTT button to stop transmitting).
Figure 3-1) Visual Diagram of General Radio to Speaker Use
