Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
VF, VF-a, VF-1
Type of Presentation: One 5-in. PPI and one
FUNCTIONAL DESCRIPTION
5-in. B-scope
Ranges: 4, 20, 80, and 200 mi
Radar Indicating Equipments VF, VF-a, and VF-1 are
Range Marker Intervals:
repeaters used with any search radar equipment capable
PPI - each 1/4 of full scale
of transmitting PPI information. Their purpose is to
B-scope - each 1,000 yd
repeat, at a remote point, accurate target information
Range Accuracy:
appearing at any selected master radar. Provision is
B-scope - :25 yd on4,000 to 50,000 yd scale;
made to transmit this information to other remote points.
+100 yd on 600 to 4,000 yd scale
PPI - range is estimated
Targets are presented on two CRT' s, one of which is a
Azimuth Accuracy:
PPI used for search and coordination and the other, a B-
B-scope - +0.15 deg on 1- and 36-speed;
scope used for accurate determination of range and
+1 deg on 1-speed
bearing. This information is of sufficient accuracy to be
PPI - +1 deg of master radar
used for fire control and torpedo direction. Operation of
Bearing Indication: True and relative
the equipment requires that a master radar system and
gyro supply it with video and trigger signals, azimuth
INSTALLATION CONSIDERATIONS
data, and range indications. The VF-a is a VF modified
for operation from a 400-cycle power supply instead of
Siting: Units may be located in any order convenient to the
from a 60-cycle supply. The Model VF-1 is a later
installing yard.
reorder of the VF.
Mounting: Precision Plan Position Indicator Repeater
CRP-55AEF mounted on metal plate fastened to
deck; other units fastened to bulkhead with angle
RELATION TO SIMILAR EQUIPMENT
brackets.
Cabling Requirements: Use standard armored cable for all
None.
interunit connections. All interunit wiring should
conform to the interconnection diagram in NAVSHIPS
TECHNICAL DESCRIPTION
900,858. All other wiring should conform to diagrams
supplied by the Navy. Allow extra cable so units can
Video Input: +1 to +3v peak
be removed for servicing and cables can be repaired.
Trigger Input: +5 to +50v peak
Do not bend coaxial cables on less than a six inch
Pulse Repetition Rate: 60 to 1,000 pps
radius.
Operating Voltages and Power Requirements:
Related Equipment: Search radar equipments capable of
VF, VF-1 - 115v, 60 cps, 1-ph, 15 amp max
transmitting PPI information.
VF-a - 120v, 400 cps, 1-ph, 15 amp max
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
PPI Repeater NT-55AEF
1
43
32
24
989
Auxiliary Rectifier NT-20ADA(VF only)
1
18-1/2
18-1/4
13
41
or NT-20ADD(VF-a, VF-1 only)
1
14-3/4
13
7-3/4
36
Selector Switch NT-24298
1
24- 1/4
12- 1/4
12
50
Line Voltage Regulator NT-301407
1
37
20- 1/4
13
318
(VF, VF-1 only)
REFERENCE DATA AND LITERATURE
Technical Manuals:
NAVSHIPS 900,858 (VF)
NAVSHIPS 91486 (VF-a)
NAVSHIPS 91478 (VF-1)
VF: 2
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