User's Manual

1 INTRODUCTION
1.1 GENERAL
The RITRON High Power DTX Plus modules are programmable 2-way radios, which operate
either in the VHF or UHF professional FM communications bands as well as a number of other
bands in the 220 MHz and 350 MHz region. Each of eight channels can be programmed to
contain a unique set of operating frequencies. The High Power DTX Plus module is made up of
two PC boards, an RF board and a control/loader board. These two boards are enclosed in a
metal case with two connectors on one end; a 50 ohm BNC connector for connection to an
antenna and a DB-15 sub-miniature connector for control input/output and a power input
connector on the other end.
In addition, the RF board/heat sink assembly is available as a stand-alone unit for system
integrators.
1.2 MODEL IDENTIFICATION
The part number system for the High Power DTX Plus module is as follows:
The module has a part number in the form of “DTX-A65-BCDEF” where:
A is the major frequency band designator:
1=VHF (136-174 MHz bands)
2=216-222 MHz band
3=340-400 MHz bands
4=UHF (400-430 MHz and 450-470 MHz bands)
B is the sub-band designator:
G=136-162 for #1 above , 340-360 MHz for #3 above, and 400-430 MHz for #4 above.
A=420-440
B=430-450
O=148-174 for #1 above, 216-222 for #2 above, 360-380 for #3 above, and 450-470 for
#4 above.
M=380-400 for #3 above.
C=470-490
T=490-512
Note that not all of the sub-bands listed above may be available, and that other sub-
bands may become available.
C is the connector designator:
B=BNC connector
D designates the IF bandwidth:
W=wide (25/30 kHz channel bandwidth)
N=narrow (12.5/15 kHz channel bandwidth)
S=very narrow (5/ 6.25/ 7.5 kHz channel bandwidth)
E designates the maximum power level:
30=30 watts
F designates whether the control/loader board has a regulator and if so, at what current level:
I=high current regulator; the unit operates from 10-15 volts at 30 watts max.
NX designates that the radio is capable of transmitting and receiving NXDN protocol Digital
signals.