Ch. 10 (ESM)

Question 1

ESM System Designator

Answer 1

AN/ALQ-210

Question 2

ESM System Components

Answer 2

ESM Receiver/Processor

4 Antennas

Question 3

ESM Primary Bands and Associated Antennas

Answer 3

Low Band (2 spiral antenna elements)
High Band (2 spiral antenna elements)

Question 4

Antenna Coverage

Answer 4

Each antenna has a minimum of a 100 degree FOV enabling a full 360 degree with overlap and AOA determination.

Question 5

ESM to SSDP

Answer 5

The ESM system interfaces with the ASE system for threat alert. The SSDP, as bus controller, commands the ESM system to transfer emitter data that has been determined to be a threat to the helo.

Question 6

ESM to AOP

Answer 6

The ESM system is a remote terminal on the 1553B bus. The AOP, as bus controller, commands the ESM system for initialization, MDL transfer, mode control, status, and transfer of emitter data. The ESM data is then displayed on the geosit and ship compatible data is sent to the ship via Hawk.

Question 7

Blanking Inputs

Answer 7

Blanking inputs are provided to minimize the interference effects of onboard transmitter signals.

Question 8

ESM in Utility Mode

Answer 8

Without MDL’s loaded on the cards or sticks the ESM system will default to a maintenance MDL. The ESM system will appear to work normally, however in reality it is only looking for two maintenance emitters and will not detect any real world emitters.

Question 9

On initial power application ESM does what

Answer 9

ESM does not load and run immediately. The operator must wait 5-6 minutes before the system goes to operational mode.

Question 10

The startup/initialization sequence has failed, an ESM fail indications is displayed on the DIAG page. What has happened and what steps do you take to fix it?

Answer 10

The ESM has automatically deconfigured.
To recover:
1. Reinitialize and allow the system time to initialize (5-6 minutes).
2. If the system fails to reinitialize, perform the ESM Troubleshooting procedure and again allow time for the system to initialize.

Question 11

While initializing your 2P commanded an auto test causing the system to load incorrectly. How do you fix this?

Answer 11

Both the ESM and MC must be power cycled.

Question 12

RWR and ESM Relationship

Answer 12

Although they are shown independently on the DIAG they are the same receiver. Actions that disable one will disable the other. Deconfiguring one will deconfigure the other. The RWR is functional once the ESM is fully online.

Question 13

How long are ESM bearing lines displayed for?

Answer 13

15 seconds

Question 14

ESM Declutter

Answer 14

With ESM decluttered emitters that have be define in the DEF EOI window as well as emitters that are marked as HTWs will still display.

Question 15

ESM Sector Windows

Answer 15

The ESM Sectors will suppress MFD display of emitter reports in specified sectors. However contacts are still processed. HTWs and EOIs are not hidden on the MFD.

Question 16

Radar Scan Types

Answer 16

Steady
Circular
Sector

Question 17

Scan Period

Answer 17

The time an emitter’s beam sweep through the same area of space

Question 18

What is the point of a Scan Modulation Analysis

Answer 18

SMA is a tool with which the operator can potentially break up ambiguities in areas with multiple emitters with similar or overlapping parameters to precisely identify emitters

Question 19

Is SMA automatic?

Answer 19

No, it must be selected

Question 20

SMA considerations

Answer 20

When a SMA is commanded the receiver must stare at the emitter of interest for the defined dwell time. The receiver is dedicated to the selected beam. The aircraft must remain within the emitters beam for the entirety of the SMA. No new emitters will be detected and no existing emitters will be updated for the entirety of the SMA.

Question 21

SMA default dwell times

Answer 21

10 seconds or a prescribed time in the MDL.

Question 22

Dwell Time range

Answer 22

0-300seconds

Question 23

How many SMA request can the system accept

Answer 23

3

Question 24

How do you stop a SMA while its in process

Answer 24

Select the SCAN MOD function and enter 0 seconds

Question 25

Two Methods of Locating Emitters

Answer 25

Parametric Electronic Order of Battle (PEOPB)

Long Baseline Interferometry (LBI)

Question 26

Ways to Initiate a Location Measurement

Answer 26

Auto Location Candidates from the MDL
Operator Requested
Data Fusion Requested
Ownship Requested

Question 27

EBT

Answer 27

Emitter Behavior Table

Question 28

How often will an Auto location candidate update

Answer 28

If the emitter is marked as slow moving in the EBT the emitter location will update periodically. If the emitter is not marked as slow moving it will only be located once.

Question 29

How many Operator Requested ESM locations can be initiated.

Answer 29

16

Question 30

Two Emitter Location Functions

Answer 30

PEOB (Parametric Electronic Order of Battle)
LBI (Long Baseline Interference
)