Codan Radio MT-4R - Manual (Page 10)

UG-001 Daniels MT-4R and MT-4D Radio Systems
www.danelec.com
Chapter 1: Introduction 2
User
Guide
MT-4
The MT-4 series of radio modules entered production during 2001.
This radio series is the P25 compliant digital narrowband radio
system, capable of analog (wideband and narrowband) or P25 digital
operation.
Daniels Electronics is committed to continually improving and
enhancing our product line. As the MT-4 P25 products evolve, the
hardware, fi rmware and software of the radio modules change. In order
to defi ne these changes, the MT-4 product line is further described
as:
MT-4R
The MT-4R series of P25 radios were manufactured from 2001 until
the end of 2003.
MT-4D
The MT-4D series of P25 radios were manufactured from 2003 until
the middle of 2006.
MT-4E
The MT-4E series are the current line of Analog and P25 modules.
DIFFERENCES BETWEEN MT-4R AND
MT-4D SERIES MODULES
The MT-4R and MT-4D modules are basically identical in operation, with
some advancements taking place in the RSS software programming
for the MT-4D (such as the ability to software program the squelch tail
on/off and timer). The only signifi cant difference between the MT-4R
and MT-4D is in the transmitter modules. The MT-4R transmitter was
not capable of being programmed for mixed mode operation. Mixed
mode is the ability for one transmitter channel to operate on either
analog or digital, based on the received signal. In order to simulate
mixed mode, the MT-4R transmitter was programmed with Bank A
as the analog channels and Bank B as the digital channels, and the
received signal simply switched between Bank A and B. The MT-4D is
capable of mixed mode, so Bank A and B can be programmed in either
analog or digital operation.
A P25 system can be comprised of both MT-4R and MT-4D modules.
For example; an MT-4R receiver and MT-4D transmitter can be used
to create a repeater, or an MT-4D link pair can be added to an MT-4R
repeater.