Motorola MOTOTRBO SYSTEM PLANNER Specifications Page 153

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144 System Design Considerations
November, 2008
users communicate with each other in talkaround while the new repeater is being installed. Once
the MOTOTRBO repeater is operational, MOTOTRBO radio users switch to digital repeater mode,
while legacy analog radio users communicate in talkaround.
To migrate a system with two repeater channels, MOTOTRBO radios are programmed with both
the current analog channels as well as future digital channels. A recommended approach is to
place all the analog channels in one ‘zone’, and all digital channels in another ‘zone’. Analog and
digital channels are programmed into the MOTOTRBO radios to allow users to communicate on
both repeaters. Scan lists are configured to allow users to monitor both analog and digital voice
transmissions.
Both the existing analog repeater and the MOTOTRBO repeater (in digital mode) should be set-up
to operate side-by-side. This configuration requires two frequency pairs: one pair for the analog
repeater and one pair for the MOTOTRBO repeater. Users gradually migrate over to the
MOTOTRBO repeater (i.e. legacy analog radios are swapped for MOTOTRBO radios). Once
every analog radio has been swapped with a MOTOTRBO radio, the legacy analog repeater can
be replaced with another MOTOTRBO digital repeater. The system will now be fully digital with two
digital repeater channels.
4.2.3 New/Full System Replacement
The new/full system replacement strategy involves replacing all existing equipment with
MOTOTRBO equipment. Typically, a new/full system replacement involves minimal downtime as
the analog repeater is replaced immediately with the MOTOTRBO digital repeater. Radio users
carry their existing radios as well as MOTOTRBO radios on cut-over day. Initially, users will
continue to access the radio system in the same manner as before. Once the analog repeater is
removed from the system, the radio users switch to digital direct mode communication using
MOTOTRBO radios. After the MOTOTRBO repeater is installed and becomes operational, radio
users switch their MOTOTRBO radios to digital repeater mode.
The new/full system replacement relies on the MOTOTRBO equipment being properly
programmed and tested before being deployed.
4.3 Frequency Licensing
4.3.1 Acquiring New Frequencies (Region Specific)
The licensing process varies from region to region. Generally, before the license process begins,
detailed information about the proposed radio system must be provided to the frequency
coordinator, such as:
Frequency/ Frequency Band – Frequency band or specific frequency it will operate on.
Subscriber Radio Count – The number of radios that will operate on the system.
Output Power/ERP – The output power of the system amplifier, as well as the effective
radiated power (ERP), which is the system's power at the antenna.
Emission Designators – Includes several pieces of vital information, such as modulation,
signal, type of information and size of the channel. This determines the channel width your
system will occupy. For MOTOTRBO systems, the Emissions Designators are
Data only: 7K60FXD
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