CHAPTER 4 PRINCIPLES OF OPERATION

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

TM 11-5805-622-14/1

PRINCIPLES OF OPERATION

the functional operation of electronic circuits

Cl. INTRODUCTION. Section I of this chapter

of each component installed in the Orderwire-

discusses the operation principles of the

Delay Equalizer Day. Section III is not applica-

Orderwire-Delay Equalizer Bay and it's compo-

ble to this equipment since there are no me-

nents. This section also includes a discussion

chanical assemblies. For basic electronic theory

of this bay% interface with other terminal equip

refer to T.O. 31-1-141.

ment and alarm facilities. Section If describes

SECTION I

FUNCTIONAL SYSTEM OPERATION

nized oscillator in the Carrier Supply TF1792. This

4-2. ORDERWIRE EQUIPMENT.

signal is demodulated in the Channel Modem

4-3. TRANSMIT PATH- Terminal A.

TF3012. la by the 16 kHz carrier generated in the

Carrier Supply. The resultant VF signal (0.3 to

4-4. As described by figure 4-1, the input signal to

3.4 kHz) is then fed through the VF Interface Match-

the orderwire equipment is a 0.3 to 3.4 kHz voice

ing Unit TF1791 to an orderwire terminal set pro-

channel derived from an Orderwire Terminal Set.

vided elsewhere in the terminal equipment.

This signal is fed to the VF Interface Matching Unit

TF1791 where it's level is adjusted by strappable

4-7. TRANSMIT PATH- Terminal B.

pads in steps of 1, 2, 4, 8 and 16 dB. The specific

level required by the cable system is selected. The

4-8. As described by figure 4-2, the input signal to

signal is then fed to the channel modem TF3012. la

the orderwire equipment is a 0.3 to 3.4 kHz voice

4-5. RECEIVE PATH-Terminal A.

4-6.

4-9. RECEIVE PATH-Terminal B.

4-10.