Volume 1
MIL-HDBK-162A
Section 1
15 December 1965
ITEM NAME: RADAR BOMB SCORING CENTRAL
TYPE: AN/MSQ-35
IFF System
Individual Pulse Amplitude: 5v max,
Operating Characteristics
2v min
Range: Line of sight - approx 190 mi
Noise: 0 to 1v rms
Challenging Modes: 3
Sensitivity: 0.4v
Input Power: 115v ac plus or minus
Overall Duration of Pulse Train: 20.3
10%, 400 cps, 1-ph, 3.25 amp
plus or minus 0.1 usec
Transmitting System
Individual Pulse Width: 0.45 plus or
Frequency Range: 990 to 1040 mc
minus 0.1 usec
Oscillator: Crystal controlled
Pulse Rise Time: Less than 0.2 usec
Type of Modulation: Pulse
Pulse Decay Time: Less than 0.4 usec
Duration: 0.7 to 1.2 usec
Pulse Spacing in Single Train: 2.9
Rise Time: 0.2 plus or minus 0.1 usec
plus or minus 0.5 usec
Decay Time: 0.4 plus or minus 0.2 usec
Interleaved Pulse Trains: 4 max
Rf Power Output: 1.5 kw
Pulse Spacing in Interleaved Pulse
Output Impedance: 52 ohms
Trains: 0.05 usec min
Receiving System
Input Impedance: 75 ohms
Frequency Range: 1080 to 1130 mc
Video Output
Oscillator: Crystal controlled
Pulse Type: One pos pulse for ea
Receiver Type: Superheterodyne
correctly coded pulse train input
Sensitivity: 76 db below 1v
Pulse Amplitude: Adjustable from 2
to 5v
Narrow: 5 mc
Pulse Width: 0.45 plus or minus 0.1
Broad: 8 to 11 mc
usec
IF.: 60 mc
Pulse Rise Time: Less than 0.2 usec
RF Input Impedance: 52 ohms
Pulse Decay Time: Less than 0.4 usec
Video Output Impedance: 75 ohms
Output Impedance: 75 ohms
Video Output Power: 0.2w
Operable Altitude: Up to 10,000 ft
Coding System
above sea level
Operable Temperature: 40F to 150F
Input Impedance: 75 to 510 ohms
Input Pulse Width: 0.3 to 15 usec
Simulating System
Input Voltage: plus 5 to plus 50v
System Test
(measured across 75 ohms)
Pulse Type: Pulse prs
Output Trigger Voltage: plus 55v
Interpulse Spacing: 5.0 plus or min-
(measured across 75 ohms)
us 0.2 usec
Pulse Rise Time: 0.1 to 0.5 usec
Pulse Width: 0.5 to 1.0 usec
Self Trigger Prf: 200 pulse pair per
Pulse Rise Time: 0.3 usec (nom)
sec
Receiver Test
Trigger Delay
Pulse Type: Single type
Out: 9.5 usec
Pulse Width: 0.5 to 1.0 usec
In: 12.5 plus or minus 0.5 usec to
Pulse Rise Time: 0.3 usec (nom)
35 plus or minus 2 usec
Input Pulse Voltage: 10v min
Mode 1
Input Repetition Frequency: 100 to
Number of Pulses: 2
2000 pps
Pulse Width: 0.3 usec (nom)
Input Impedance: 1500 ohms
Pulse Spacing: 3 plus or minus 0.2
Trigger Delay: 10 to 100 usec
usec
Types of Output
Mode 2
System Test: Code 77 rf pulse train
Number of Pulses: 2
Receiver Test: Single rf pulse
Pulse Width: 0.3 usec (nom)
Oscillator Type: Crystal
Pulse Spacing: 5 plus or minus 0.2
Output Frequency Range: 1080 to 1130
usec
mc
Mode 3
Output Pulse
Number of Pulses: 2
Duration: 0.8 usec
Pulse Width: 0.3 usec (nom)
Spacing: 2.9 usec
Pulse Spacing: 8 plus or minus 0.2
Output Impedance: 50 ohms
usec
IFF System (Antenna AT-352/UPA-22)
Decoding System
Frequency Range: 1010 to 1110 mc
Video Input
Dipole (Slot Radiators): Vertically
Pulse Type: Coded pulse trains
polarized
Horizontal Beam Width: less than 7
Pulse Polarity: Pos
AN/MSQ-35: 4
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