Directed Electronics 554A Instructions d'exploitation télécharger pdf (Page 7)

1-2. Indexes of Publications

a. DA Pam 310-4. Refer to the latest issue of DA

Pam 310-4 to determine whether there are new edi-

tions, changes, or additional publications pertaining to

the equipment.

b. DA Pam 310-7. Refer to DA Pam 310-7 to deter-

mine whether there are modification work orders

(MWO’S) pertaining to the equipment.

1-3. Forms and Records

a. Reports of Maintenance and Unsatisfactory

Equipment. Maintenance forms, records, and reports

which are to be used by maintenance personnel at all

maintenance levels are listed in and prescribed by TM

38-750.

b. Report of Packaging and Handling Deficiencies.

Fill out and forward DD Form 6 (Packaging Improve-

ment Report) as prescribed in AR

700-58/NAVSUPINST 4030.29/AFR 71-13/MCO

P4030.29A, and DLAR 4145.8.

c. Discrepancy in Shipment Report (DISREP) (SF

361). Fill out and forward Discrepancy in Shipment

Report (DISREP) (SF 361) as prescribed in AR

55-38/NAVSUPINST 4610.33B/AFR 75-18/MCO

TM 11-6625-2611-12

P4610.19C and DLAR 4500.15.

1-4. Administrative Storage

Administrative storage of equipment issued to and

used by Army activities shall be in accordance with TM

740-90-1.

1-5. Destruction of Army Electronics

Materiel

Destruction of Army electronics materiel to prevent

enemy use shall be in accordance with TM 750-244-2.

1-6. Calibration

Pertinent publications on calibration of this equipment

is referenced in TM 11-6625-2611-35.

1-7. Reporting Equipment Improvement

Recommendations (EIR)

EIR’s will be prepared using DA Form 2407, (Mainte-

nance Request). Instructions for preparing EIR’s are

provided in TM 38-750, The Army Maintenance Man-

agement System. EIR’s should be mailed direct to US

Army Communications and Electronics Materiel

Readiness Command, ATTN. DRSEL-MA-Q, Fort

Monmouth, New Jersey 07703. A reply will be fur-

nished direct to you.

Section Il. DESCRIPTION AND DATA

1-8. Purpose and Use

The test set is a bench test set which when used with an

oscilloscope and Test Set, Transponder Set

AN/APM-239 provides field personnel with the

capability to check, maintain, align and calibrate

transponder sets which meet the requirements of DOD-

AIMS 65-1000. The test set generates IFF interroga-

tions and transmits these signals at adjustable rf

power levels and adjustable prf to the transponder

under test. Two separate variable rf outputs are pro-

vided to test diversity type transponders, or the two rf

paths can be combined to test transponder ISLS

characteristics over the complete dynamic range of the

transponder. The rf reply from the transponder is

demodulated and can be analyzed for proper frequency,

power level, coding, pulse shape and pulse train spac-

ing. Mode 4 operation, including disparity conditions,

can be simulated. Facilities are included to test the

selectivity of the transponder received and suppres-

sion pulse circuits; and supply crystal controlled

markers to the oscilloscope. A self-test feature permits

isolation of failures to a printed circuit card and/or

module level using only the test set indicators and test

points.

1-9. Description

The test set generates the necessary signals to test

transponder sets and converts rf signals generated by

the transponder set into video signals which are ap-

plied to the oscilloscope for display. The test set con-

sists of the items listed in paragraph 1-12. All items of

the test set are described in the following sub-

paragraphs.

a. Test Set, Transponder TS-3395A/APM-305.

TS-3395A/APM-305 contains all the active circuits of

the test set. All circuits and their related components

are mounted on a common chassis, which is enclosed in

a dust cover. All connectors, controls, indicators, and

1.0 ampere fuse are located on the front panel. All con-

trols are directly calibrated. Two vertically positioned

handles, which act as guardrails, are located at the ex-

treme ends of the front panel. As indicator lamp indi-

cates that the test set is energized. A second indicator

indicates when the power supply fails. A meter is pro-

vided with dual calibration to measure rf peak power

and prf. The weight and overall dimensions of the test

set are listed in paragraph 1-12.

b. Test Set Cover MX-99441APM-305A. Test Set

Cover MX-9944/APM-305A (front panel cover) at-

taches to the front panel of the test set to protect it

when not in use. All accessories are within the front

panel cover. The front panel cover attaches to the test

set by four latches.

c. Power Cable Assembly. The three-conductor

power cable assembly connects the test set to a 115 vac

primary power source. One end of power cable assem-

bly has an MS3016E1OSL-3S connector. This connector

is to be connected to the test set POWER connector.

The other end of power cable assembly has a UP-131M

connector connected to the primary power source. The

ground pin of the connector is spring-loaded to the in-

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Directed Electronics 554A Instructions d'exploitation Page 7

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