(4) Technical characteristics of the node switch, LENS, and SENS are discussed in
b. Transmission Equipment.
(1) Line-of-Sight (LOS) Multichannel Radio Terminal AN/TRC-190 provides the
primary point-to-point radio connection between the various nodes of the MSE network. It also
provides radio links to interconnect the node switch with the LENS, SENS, and radio access
units (RAU). The terminal comes in four assemblages (V1, V2, V3, and V4). The V1 provides
the radio links to the SENS and RAU sites. The V3 provides radio links to interconnect the node
centers. The V4 provides the radio links to interconnect the LENS to a node center. The V2
version is a North Atlantic Treaty Organization (NAT) analog interface unit and is normally
found only at corps level. It provides a radio link and interface between U.S. and NATO units.
Functional characteristics of the radio include: frequency band 1 - 225 to 400 MHz, frequency
band 2 - 1350 to 1850 MHz, highly directional antennas, engineer orderwire, secure digital voice
orderwire, and radio relay capability (V3 only). All versions of the radio terminal are contained
in a S-250 shelter and transported on a HMMWV. Power is provided by a PU-751 5-kw trailer-
mounted diesel generator set. The interior view of the AN/TRC-190 radio terminal is shown at
Figure 1-6. All versions of the radio terminal are configured basically the same; the major
difference is the number of radios installed inside the shelter to terminate the radio links.
(2) Super High Frequency (SHF) Radio Set AN/GRC-224(P) provides LOS radio
links to interconnect the AN/TRC-190 multichannel radio terminal with a LENS, SENS, or node
switch when terrain features or tactical mission requirements dictate the use of radio rather than
(a) It operates over four sub-bands: sub-band C (14.718 to 14.816 GHz), sub-
band F (15.033 to 15.131 GHz), sub-band L (14.648 to 14.816 GHz), and sub-band M (15.033 to
(b) It comes in two models. Model A transmits on sub-bands C or L and receives
on sub-bands F or M. Model B transmits on sub-bands F or M and receives on sub-bands C or L.
The SHF links must be configured so a model A radio always lifts up with a model B radio.
(c) Its radio consists of a radio frequency (RF) unit and a control unit. The RF
unit includes a receiver and transmitter mounted on a two foot diameter parabolic reflector
antenna. The control unit is normally mounted inside the shelter of the LENS, SENS and
AN/TRC-190 radio terminals. Figure 1-7, page 1-10, illustrates the AN/GRC-224 radio set