Et2 Tactical Systems

Front 1

FDDI stands for what in the 73 Radar system

Back 1

Fiber Optic Distribution Data Interface

Front 2

The AN/SPS-73(V) SSR can track up to ___ contacts.

Back 2

200

Front 3

What are the AN/SPS-73 Transmit Frequencies for x-band and s-band?

Back 3

X-Band is 9410 Mhz
S-Band is 3050 Mhz

Front 4

What are the AN/SPS-73 Peak Power Outputs for x-band and s-band?

Back 4

X-Band is 25 kW Minimum
S-Band is 30 kW Minimum

Front 5

What is the AN/SPS-73 range for x-band and s-band?

Back 5

X-Band is 96 Nautical Miles
S-Band is 96 Nautical Miles

Front 6

What is the purpose of the J-Box in the An/SPS-73 SSR System?

Back 6

The J-Box is basically a switch that connects the X- Band and the S-Band radars to the SAOP console(s).

Front 7

IFF is an electronic system for identifying what?

Back 7

targets detected on search radar as friendly or unfriendly.

Front 8

The Coast Guard uses the IFF system on what vessels?

Back 8

Cutters 110 feet or larger, and CG Aircraft.

Front 9

The basic equipment used in a AN/UPX-28(V) IFF transponder system is contained in what three units?

Back 9

· Omni Directional Antenna,
· Transponder Set, and
· Control Unit.

Front 10

The IFF challenges what frequency?

Back 10

1030 Mhz

Front 11

The IFF Replies in what frequency?

Back 11

1090 Mhz

Front 12

A (V)6 configuration of the 64 Radar system is used onboard

Back 12

270’S

Front 13

Why are Antenna Junction Boxes necessary in some 64 Radar configurations?

Back 13

They are necessary because in some systems,
the same antenna must be shared by two MTR’s

Front 14

What is the power out of an S-Band high power MTR?

Back 14

60 kW

Front 15

The loss of ___ ___(major signal) would cause the loss of the transmitted pulse in the MTR and the loss of antenna rotation.

Back 15

Transmit Enable

Front 16

The radar is not displaying a heading flash in any of its indicators. What unit is most likely at fault?

Back 16

Antenna Array

Front 17

Magnetron electron tubes, which are utilized in the 64 Radar system, can
produce an ________ hazard when operated with voltages in excess of 6 KV?

Back 17

X-Ray Radiation

Front 18

Compute the average power out of a radar system if the peak power is 18 kW,
PRF is 3600 Hz, and PW is 140 nanoseconds.

Back 18

9.07 watts…. Pavg = Ppk times PRF times. PW

Front 19

Define bearing resolution.

Back 19

The ability to separate adjacent targets the same
distance away.

Front 20

How long (measured in seconds) is a radar mile?

Back 20

.0000123 seconds or 12.3 microseconds

Front 21

What is the function of a duplexer?

Back 21

Connects the antenna to the transmitter during
transmit time, and connects the antenna to the
receiver during receive time.

Front 22

What three inputs are required by any Collision Avoidance System (CAS).

Back 22

Radar, Gyro, Speed log

Front 23

State the transmit frequency, peak power out, and range for both the X and S-Band 73 Radar.

Back 23

X: 9410 Mhz, 25 kW minimum, 96 Nautical Miles.
S: 3050 Mhz, 30kW minimum, 96 Nautical Miles.

Front 24

What units or assemblies are considered part of the “Radar Set”?

Back 24

The antenna, pedestal, and R/T units.

Front 25

The purpose of the Junction Box in a 73 Radar is to

Back 25

Used in configurations with two antennas, it connects the X and S-Band antennas to the SAOP’s.

Front 26

What type of R/T does a WAGB class of cutter utilize?

Back 26

Down R/T

Front 27

What equipment is contained in the Transponder Set?

Back 27

Receiver/Transmitter
Power Supply
Test Set
Kit Computer
Suppression Gate.