Table 1-1. Leading Particulars - TM-11-5805-622-14-10012

T.O. 31W2-4-206-2

TM 11-5805-622-14/1

1-20. POWER SUPPLY. The Full Mains Power

1-16. MATCHING UNIT. The Matching Unit TF1790

Supply TF610.9 provides power to the Supergroup

receives the orderwire signal from the channel

Amplifier, Pilot Amplifier and orderwire components.

modem and matches it to the input of the amplifier.

This supply also provides AC alarm voltages.

1-17. DIRECTIONAL COUPLER. The Directional

1-21. SUPERGROUP AMPLIFIER. The Supergroup

Coupler TF1788 separates the outgoing from the in-

Amplifier TF1971.7 occupies one complete shelf

coming orderwire signals. Incoming signals are fed

width of the bay, but consists electrically of two in-

to an amplifier at A terminal or through connection

dependent amplifiers each having a constant gain of

at B terminal. Outgoing signals are received from

20 db in the range from 312 to 552 kHz. For greater

an amplifier and passed to the output termination

redundancy each amplifier section has two parallel

point.

circuits. The gain for each amplifier section can be

adjusted from 18.5 to 21.5 db by means of special

strapping prior to inserting the unit into the bay. The

1-18. DELAY EQUALIZERS. The Delay Equalizers

in and output of each amplifier section is wired to the

of the Orderwire Delay Equalizer Bay consist of a

Bay Head, thus permitting the insertion at any desired

number of passive networks inserted into the as-

part of the Delay Equalizer portion of the bay.

signed shelves of the bay together with two units of

supergroup amplifiers. The SG Amplifier units con-

1-22, REFERENCE DATA.

tain four independent amplifiers, each providing ap-

proximately 20 db of gain. The number of delay

1-23. The data covering the characteristics of the

equalizer units for each terminal differs, since the A

Orderwire-Delay Equalizer Bay are tabulated on the

to B transmit direction requires more equalizer cir-

following pages. Table 1-1 lists the leading particu-

cuits than B to A. The supergroup amplifiers pro-

lars of the bay, Table 1-2 lists the capabilities and

vide the gain required to compensate for any insertion

limitations of the equipment, Table 1-3 provides data

loss introduced by the equalizers.

on the equipment supplied as part of this bay, Table

1-4 lists the test equipment necessary for mainte-

1-19. POWER SUPPLY, The Orderwire Power

nance of the equipment, Table 1-3 is broken down

into a dual listing to indicate the difference between

Supply TF1927.7 provides the required DC power for

operation of the orderwire components,

the Orderwire Equipment in Terminals A and B.

Table 1-1. Leading Particulars

Power Requirements -

Primary Power

1-5