RF Neulink NL5000-T - Manual (Page 4)

4
I NL5000-T MODULES
1 INTRODUCTION
1.1 GENERAL
The NL5000-T modules are programmable 2-way radios, which operate either in the VHF, 220
MHz or UHF professional FM communications bands. Each of eight channels can be
programmed to contain a unique set of operating frequencies. The NL5000-T VHF/220/UHF
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. The RF board
as sold as a stand-alone item has a few more hardware options than when installed and sold as part
of a module. See section 11 for details on the hardware options.
1.2 MODEL IDENTIFICATION
The part number system for the NL5000-T VHF/220/UHF module is as follows:
The module has a part number in the form of “NL5000-VHF/HN”
Where:
A is the major frequency band designator:
VHF=VHF
220=220 MHz
UHF=UHF
/ designates the IF bandwidth:
N=narrow
W=wide
F designates whether the control/loader board has a regulator and if so, at what current level:
D=no regulator; the unit must operate at +7.5 VDC and is limited to either 3 or 6 watts
max.
L=low current regulator; the power module is not regulated. Used for 10 watt version
only.
I=high current regulator; the unit operates from 10-15 volts at either 3 or 6 watts max.
Example: NL5000-UHF/HN-T would be a UHF module for operation between 450 and 470 MHz
with a BNC RF connector, narrow (12.5 kHz channel spacing).
Note that the RF board inside a module is not exactly the same as the corresponding stand-alone
RF board. There are a number of components and jumper options on the stand-alone board that
are not necessary when mated to the NL5000-T control/loader board.