CHAPTER 1 INTRODUCTION - TM-11-6625-922-150006

TM 11-6625-922-15

CHAPTER 1

INTRODUCTION

Section I. GENERAL

1-3. Forms and Records

1-1. Scope

a. Reports of Maintenance and Unsatisfactory

a. This manual describes Measuring Set, Envelope

Equipment.

Use equipment forms and records in

Delay Distortion TS-2669/GCM (fig. 1-1), its installation,

operation, functioning, repair, and adjustment.

accordance with instructions in TM 38-750.

includes instructions for troubleshooting, testing,

aligning, and repairing the equipment.

b. Report of Packaging and Handling Deficiencies.

Fill out and forward DD Form 6 (Report of Packaging

b. A basic issue items list is in appendix B. A

and Handling Deficiencies) as prescribed in AR 700-58

maintenance allocation chart is in appendix C. Repair

(Army), NAVSUP Publication 378 (Navy), AFR 71-4 (Air

parts are listed in appendix D.

Force), and MCO P 4610-5 (Marine Corps).

c. Appendixes B, C, and D are current as of 29

Discrepancy in Shipment Report (DISREP)

January 1969.

(SF361). Fill out and forward Discrepancy in Shipment

Report (DISREP) (SF361) as prescribed in AR 55-38

1-2. Indexes of Publications

(Army), NAVSUP Pub 459 (Navy), AFM 75-34 (Air

Force), and MCO P4610.19 (Marine Corps).

a. DA Pam 310-4. Refer to DA Pam 310-4 to

d. Reporting of Equipment Manual Improvements.

determine whether there are new editions, changes, or

Report of errors, omissions, and recommendations for

additional publications pertaining to the TS-2669/GCM.

improving this equipment manual by the individual user

is encouraged. Reports should be submitted on DA

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

Form 2028 (Recommended Changes to DA

determine whether there are modification work orders

Publications) and forwarded direct to the Commanding

(MWO's) pertaining to the TS-2669/GCM.

General, U.S. Army Electronics Command, ATTN:

AMSEL-ME-NMP-AD, Fort Monmouth, N.J. 07703.

Section II. DESCRIPTION AND DATA

supergroup equipment. It can also be used with active

1-4. Purpose and Use

and passive networks, filters, and equalizers.

The TS-2669/GCM is used to test and measure

1-5. New Term for Cycles Per Second

envelope delay characteristics of voice frequency and

data communication networks. It is capable of providing

accurate delay and attenuation measurements in the

The National Bureau of Standards has officially adopted

frequency range of 100 Hertz (Hz) to 552 kilohertz

the term HERTZ for cycles per second. The following

(kHz). The TS-2669/ GCM was designed specifically for

chart provides the common equivalents.

use with standard telephone lines, group equipment, and

Old

New

Unit/Quantity

Old term

New term

abbrev

Frequency

Cycles per second

cps

Hertz

10-3 cycles

Millicycles per

Millihertz

mHz

per second

second

1-1