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TECHNICAL MANUAL

HEADQUARTERS,

 

DEPARTMENT OF THE ARMY

No. 11-6625-1576-24P

WASHINGTON , DC, 27 September 1976

ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE

REPAIR PARTS AND SPECIAL TOOLS LIST

FOR

DISTORTION ANALYZERS AN/URM-180

(HEWLETT-PACKARD MODEL 333A)

NSN 6625-00-089-4227

AND

AN/URM-184A (HEWLETT-PACKARD MODEL 334A)

NSN 6625-00-802-8718

Current as of 12 July 1976

REPORTING OF ERRORS

You can inprove this manual by recommending improvements using DA Form 2028-

2 (Test) located in the back of the manual. Simply tear out the self addressed form, fill it out as shown on the sample, fold it where shown, and drop it in the mail.

If there are no blank DA Form 2028-2 (Test) in the back of your mamual, use the standard DA Form 2028 (Recommended Changes to Publications and Blank Forms) and forward to the Commander, US Army Electronics Command, ATTN: DRSEL- MA-Q, Fort Monmouth, New Jersey 07703.

In either case a reply will be furnished direct to you.

Table of Contents

Illus

Page Figure

SECTION

I.

I n t r o d u c t i o n

 

II.

Repair

part list

G ROUP

00

Indicator Distortion AN/URM-180

 

 

Indicator distortion, top and bottom

 

01

Mechanical parts and A4 PC

board

 

Impedance converter

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..

 

02

Rejection amplifier

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 

03

Metering

circuit

. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .

 

04

Power supply

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..

SECTION III. Special tools list (Not applicable)

 

 

IV.

National stock number and part number index

1

5

4 1

6 2

10 3

14 4

18 5

226

267

28

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HP AN, URM-180, URM-184A manual 1 1 6 6 2 5 1 5 7 6 2 4 P

URM-180, URM-184A, AN specifications

HP AN, URM-184A, and URM-180 are three notable radios that have earned their place in the ranks of significant communication equipment used primarily by military and aviation sectors. Each of these models features distinct properties and advanced technologies that cater to specific operational needs.

The HP AN is a versatile communication device known for its reliability and durability in challenging environments. It supports multiple frequency bands, enabling seamless communication over long distances. Its robust design is tailored to withstand extreme weather conditions and rough handling, making it a preferred choice for military operations. The HP AN employs advanced modulation techniques that enhance signal clarity and reduce interference, ensuring secure communications. Additionally, it integrates digital signal processing technology, which further improves performance by optimizing audio quality and reducing background noise.

The URM-184A, on the other hand, is a tactical radio designed to provide superior performance in both ground and air operations. One of its standout features is the wideband frequency capability, which allows it to operate across a broad spectrum of frequencies, enhancing its versatility. The URM-184A is equipped with sophisticated encryption algorithms to ensure secure voice and data transmission, critical for defense applications. This model also boasts improved battery life, providing extended operational readiness without the need for frequent recharges. Its ergonomic design enables ease of use, even in high-pressure situations.

Meanwhile, the URM-180 is tailored for air traffic control and aviation communication. It emphasizes clarity and reliability, ensuring pilots and ground crews can maintain effective communication during flights. The URM-180 incorporates state-of-the-art noise-cancellation technology, which minimizes background sounds, allowing for a clearer transmission of vital information. It also features an intuitive interface that simplifies operation, crucial during busy flight operations. This model supports both analog and digital communication formats, making it compatible with various aircraft systems.

In summary, HP AN, URM-184A, and URM-180 radios exemplify advanced engineering and innovative technologies suited for military and aviation communication. Their key features, including durability, wideband frequency capabilities, advanced encryption, and noise-cancellation technology, ensure they meet the demanding requirements of modern operational environments. Each model offers unique advantages that cater to specific user needs, making them invaluable assets in their respective fields.