1-2 MTR3000 Base Station/Repeater: Description
When configured for digital operation, the base station/repeater offers additional services. The digital
base station/repeater operates in TDMA mode, which essentially divides one channel into two virtual
channels using time slots; therefore the user capacity is doubled. The base station/repeater utilizes
embedded signaling to inform the field radios of the busy/idle status of each channel (time slot), the
type of traffic, and even the source and destination information.
The MTR3000 Base Station/Repeater is divided into functional modules that separate the frequency
band specific and transmitter power specific circuits from other circuits and has separate modules for
the control interface. These modules are self contained functional blocks with module-specific
alarms. This design facilitates the field replaceable unit (FRU) concept of field repair to maximize
system uptime.
The FRU architecture also allows another important feature, which is the upgrading of an existing
MTR2000 Base Station/Repeater to support MOTOTRBO functionality. With MTR2000 MOTOTRBO
Digital Upgrade kit, a current user of the MTR2000 Base Station/Repeater can upgrade their base
station/repeater to support all MOTOTRBO digital functionality as that of a factory produced
MTR3000 Base Station/Repeater.
Currently, the MTR2000 MOTOTRBO Digital Upgrade supports the following:
• UHF : 1–30 W (low power), 2–40 W (low power) and 25–100 W (high power)
• 800/900 MHz : 20–75 W
Once the upgrade is performed, the MTR2000 or MTR3000 Wireline and Auxiliary I/O board
functionality will no longer be supported.
A MTR2000 MOTOTRBO Digital Upgrade comprises the following:
• New Exciter Module
• New Receiver Module
• New Station Control Module
• New Front Bezel
• Regulatory Sticker
Refer to Figure 1-1 for the front view (with front bezel) and Figure 1-2 for the front view (without front
bezel) of MTR3000 Base Station/Repeater. Figure 1-3 shows the rear view portion of the base
station/repeater.
Note
When configured in Digital Mode, the base station/repeater can only be used as a repeater.
Note
A MTR2000 MOTOTRBO Upgrade will only support the MTR3000 wireline card if the
backplane interface board is replaced by model DLN6721.
To Next Page
Loading...
Need help?
General
