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Phone: 216-265-2315 Fax: 216-267-2915
www.mentorradio.com
(11/11)
M2115 OWNERS MANUAL
Solutions for Advancing Communications
Introduction [3]
Mentor Radio Model M2115 refers to a family of VHF Band aviation transceiver radios. Model M2115M refers to the
vehicle mounted mobile version of the transceiver, while models M2115B and M2115B-xx refer to the 10W and ‘xx’ watt
base station versions, respectively. Both the mobile and base station radios use the same core radio. However, there are
several differences between them, which are as follows:
1.)
Input power required
: The M2115M requires 12-14 VDC, whereas the M2115B and M2115B-xx versions both
operate off of an AC power source (115 VAC or 230 VAC). There are three versions of base station radios
available: M2115B (rack mount style case is available), M2115B-25 and M2115B-50.
2.)
External radio frequency (RF) power amplifiers
: The M2115 when used with a PA25 or a PA50 power
amplifier can provide closed loop power control for up to 25 watts and 50 watts respectively in three power
steps. The M2115B-25 uses the PA25 and the M2115B-50 uses the PA50.
3.)
Microphone signals
: The 500 ohm audio output signal is factory configurable. For mobiles, it is connected to
the microphone jack for headset use. On the base unit, it may be connected to the rear panel for
remote control
connections
.
4.)
Remote interface
: All base radios have remote control capability. The 12-pin rear power plug includes discrete
signals for connecting to a variety of remote controls. 5 signal lines (F1 through F5 are available to allow
remote frequency selection. Any one of up to 16 channels may be selected. Two of these 5 lines serve
multiple purposes, which makes it so that only 3 frequency selection lines may be used when an external PA is
being used.
On the M2115B base station unit, a rocker style power switch is on the rear of the base power supply and controls the AC
input power to the unit. On M2115B-XX style base station units, the rocker style power switch is located on the front
panel. . The unit is provisioned with a D-shaped AC power plug to allow low cost international power cords to be
connected to local AC power. The power-plug on all base station units has a built-in fuse providing circuit overload
protection and a spare fuse is included in the power plug.
Physical Component Descriptions [4]
Radio Cards [4.1]
A M2115 may contain one or two radio cards, while the radio system’s main controller is housed only on the VHF voice
radio card operating in the 118.025 MHz – 136.975 MHz VHF band. Therefore, all M2115’s must have this radio card
installed. Expanded functionality may be given to the radio by adding a second radio card. Each radio will have its own
separate antenna connector on the rear panel which allows for simultaneous dual band operation.
The second radio card may operate in one of several bands planned for integration into the M2115 unit. The first radio
card to be introduced will be a UHF FM LMR radio operating in the 450-470MHz band for voice and low speed data. As
technology progresses, radios in different frequency bands offering diverse functionality will be developed and made
available for the second card slot.
