1
INTRODUCTION
1.1
GENERAL
The RITRON 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
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 power and control input/output.
In addition, the RF board is available as a stand-alone unit for system integrators.
1.2
MODEL IDENTIFICATION
The part number system for the DTX Plus module is as follows:
The module has a part number in the form of “DTX-A54-BCDEF”
Where:
A is the major frequency band designator:
1=VHF (136-174 MHz bands)
2=220-245 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, 220-245 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
M=MCX 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)
