Codan Radio MT-4E Analog and P25 Digital - User Guide - Manual (Page 17)

MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS | USER GUIDE
Chapter 2: Technical Information Page 9
MIXED MODE OPERATION
Mixed mode operation is used to allow the receivers and transmitters to work in either analog or P25
digital mode without reprogramming the radio.
A mixed mode receiver will receive the incoming FM or C4FM transmission and will automatically detect
and demodulate the signal to an analog or P25 digital signal. The receiver will then output either an
analog or digital COR signal, as well as the appropriate serial data. A mixed mode transmitter will
accept the incoming serial data and analog or digital PTT and will modulate the signal as either FM or
C4FM, based on its input. This allows the repeater to repeat both analog and P25 digital signals.
UPGRADING FIRMWARE VERSIONS
Codan Radio Communications allows customers to upgrade the fi rmware of their MT-4E Receivers and
Transmitters via the Firmware Flashing Software and Firmware Upgrade fi les, available at the Codan
website www.codanradio.com under Support - Software & Firmware.
A type A to 5 pin mini-type B USB cable is used to connect the USB port of an IBM compatible computer
to the USB port on the front panel of the Receiver or Transmitter module.
It is not necessary to upgrade the fi rmware if the equipment is installed and is operating satisfactory. A
fi rmware upgrade is typically only needed to fi x minor software bugs or to upgrade the functionality of
the equipment.
Firmware versions earlier than 1.6.0 must be returned to the factory for upgrading. Contact the Codan
service department for more information.
Table 2-1 shows the fi rmware versions for MT-4E modules.