CHAPTER 1. GENERAL INFORMATION
SECTION I: INTRODUCTION
weather conditions due to the inherent penetrating
characteristics of the high-powered S-band transmitted
1.1 SCOPE OF MANUAL
energy. The 20-kW X-band radar, with its narrow
This manual provides shipboard operating and
horizontal beam width, features high target definition
maintenance instructions for Radar Sets AN/SPS-64 (V)
and superior bearing resolution.
1, AN/SPS-64(V)2, AN/SPS-64(V)3, and AN/SPS64(V)
In the normal mode of operation, the radar displays
4.
ships, buoys, and land around the ship's position, which
The manual is divided into chapters and, where
is shown at the center of the display. In the offset mode
necessary, subdivided into sections.
This chapter
of operation, the entire display is offset by 70 percent of
contains an introduction (Section I), system descriptions
the CRT radius (astern only). This permits an expanded
view of the area ahead of the ship without giving up the
Installation instructions, operating instructions, a
advantages of being on the shortest range possible. No
functional theory of operation, maintenance instructions,
offset is available on the 48 or 64 mile ranges.
and drawings including detailed theory of operation and
The indicator has selectable display ranges,
parts lists are contained in Chapters 2 through 6,
subdivided by range rings, to enable the operator to
respectively.
quickly estimate the range of echoes. The indicator also
has a variable range marker (VRM) function that permits
1.2 APPLICABILITY CODES
direct digital readout of echo range. An electronic
bearing line (EBL) feature is also available to aid in
Unless noted by specific nomenclature, or as coded
determining the exact relative bearing of any echo
below, the information set forth in this manual is
displayed. With this information, the ship's position can
applicable to all systems/equipments. The systems and
be fixed rapidly and reliably to provide for safe
codes used in this manual are as follows:
operation, day or night, regardless of atmospheric
visibility.
System
Code
Radar Set AN/SPS-64(V) is furnished in four (4)
Radar Set AN/SPS-64(V) 1
(V1)
system configurations. They are called the Single
Radar Set AN/SPS-64 (V) 2
(V2)
configuration (V1), the Dual Partial configuration (V2),
Radar Set AN/SPS-64(V)3
(V3)
the Dual configuration (V3) and the Dual Special
Radar Set AN/SPS-64(V)4
(V4)
configuration (V4).
(V1) The Single system navigational radar operates
The codes, indicating limited applicability of
on X-band at 20 kW with a single 12-inch indicator.
information, are given as a parenthetical suffix to the
Rapid antenna rotation permits a new target update
titles of appropriate paragraphs, figures and tables.
every two (2) seconds. Improved reliability is achieved
with solid state components which reduce noise and
1.3 FUNCTIONS AND CAPABILITIES OF SYSTEMS
spikes to a minimum while providing for maximum
This radar system is specifically designed for
isolation between the transmitter and balanced receiver
navigational marine use. Advanced design techniques
mixer.
have minimized its size, weight, and power consumption
(V2) The Dual Partial system includes all the
and maximized reliability and performance.
The
features of the Single system (V1), plus the advantage
equipment is designed to withstand long periods of
of increased reliability through redundancy.
vibration and shock and the extremes of weather
This is achieved through the introduction of a second
encountered in marine service. This radar features high
receiver transmitter (RT-1240), a second azimuth range
output power, high pulse-repetition rate, narrow antenna
indicator (IP-1283) and a switching unit (SA-2156) that
beam width, sensitive receiver, and computer enhanced
enables the radar system to function in any one of six
display to provide an accurate, clearly-defined, and
(6) operating modes. The mode chosen determines
bright radar screen presentation on all ranges, even on
which indicator shall be master (i.e., in control) and
a fast-moving vessel.
whether one or two receiver transmitter(s) will be
The radar is available in both S-band (10 cm) and
operating.
X-band (3-cm) frequency models. The 50-kW S-band
radar provides excellent target visibility in most adverse
1-1
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