
System Components and Topologies 117
November, 2008
MOTOTRBO radios support analog mode as well. In order for the MOTOTRBO radio to
communicate with an analog radio, it must be programmed for analog mode, as well as
programmed with the same frequency and parameters (for example, PL and DPL) as the analog
radio. While in analog mode, the MOTOTRBO radio supports most standard analog features
including a subset of MDC signaling features. While in analog direct mode, the MOTOTRBO
radios does not support any of the digital features.
3.2.1.2.1 Summary of Features in Analog Direct Mode
All features listed in “Analog Features” on page 78 are supported in analog direct mode.
3.2.1.3 Interoperability between Digital MOTOTRBO Radios, Mixed Mode
MOTOTRBO Radios, and Analog Radios in Direct Mode
In this configuration, a MOTOTRBO subscriber is programmed to talk to an analog radio as well as
a MOTOTRBO radio that is programmed for digital only.
In order for the MOTOTRBO radio to communicate with the analog radio, it must be programmed
for analog mode, as well as programmed with the same frequency and parameters (for example
PL and DPL) as the analog radio.
When in the digital mode, the MOTOTRBO subscriber has all of the digital features that are
available in digital direct mode. However, the MOTOTRBO radio user has to manually switch from
digital mode to analog mode to communicate with the two groups.
Alternatively, the MOTOTRBO radio user can program the radio to scan between the analog and
digital channels to ensure a call is not missed. This can be done from the keypad of the radio or
through the CPS. Please see “Scan” on page 39 and “Scan Considerations” on page 41 to learn
more about scan.
Figure 3-17 Legacy Analog and MOTOTRBO Analog and Digital Radios in Direct Mode
Legacy
Analog SU
RX = f
1
TX = f
1
RX = f
2
TX = f
2
f
1
f
1
MOTOTRBO SU*
(analog mode & digital mode)
analog
MOTOTRBO SU
(digital mode)
f
2
f
2
digital
RX = f
2
TX = f
2
* changed via mode choice
RX = f1
TX = f
1
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