ORDERWIRE POWER SUPPLY TF1927.7 (Figure FO-4).

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

TM 11-5805-622-14/1

heater supply. In the T2 circuits relay K3

the signal to disable the synchronizer while calibra-

diode bridge monitors the 20 volt AC alarm

tion of the 576 kHz oscillator section is being accom-

while relay K4 monitors the 24 volt DC supply. I n

plished.

the T3 circuit relay K1 monitors the plate supply. If

any of the above circuits should fail, it's respective

4-47. ORDERWIRE POWER SUPPLY TF1927.7

relay will deenergize causing it's contacts to close

(Figure FO-4).

and energize relay K5 in the T2 circuit and at the

same time applying an external alarm signal.

4-48. Orderwire Power Supply TF1927.7 develops

the operating voltage for the orderwire components

4-51. DELAY EQUALIZER TCDE1796 (Figure 7-8).

of the Orderwire-Delay Equalizer Bay. The primary

AC power is applied to terminals YA5, YA6, YB5

4-52. The Delay Equalizer TCDE1796 consists of a

and YB6 and then to transformer T1. The secondary

plug-in type unit accommodated in the appropriate

of T1 is tapped and applied to S1 on 8 position rotary

shelf of the Delay and Orderwire Bay. Connections

switch. Diode bridge CR1 thru CR4 forms a fullwave

rectifier. The filter circuit made up of L1, C1, pro-

are made by means of a multiconnector in the rear

of the unit. From the Bay Head into a Delay Equal-

duces a DC output, at terminals YA1 and YA2 of

izer and out of the unit up to the Bay head the wiring

-24 VDC.

is coaxial 75 Ohm (unbalanced). The Delay Equal-

izers (and their SG Amplifiers) have to be considered

4-49. POWER SUPPLY TF610.9 (Figure FO-12).

as an integral part of the cable subsystem deter-

mining together with other equalization means - the

4-50. Power Supply TF610.9 provides the

amplitude and delay characteristics of the entire

Orderwire-Delay Equalizer Bay with voltages for

cable subsystem: Interface to Interface. The Delay

plate, heater and alarms circuits and includes alarm

Equalizers have no accessible testpoints or calibra-

supervision circuits. Primary AC power is con-

tors. Each Delay Equalizer has been designed to

nected to terminals X5B and X6B and applied to the

accommodate up to 24 individual printed circuit

primary windings of transformers T1, T2, and T3.

boards. Each individual PC board houses two sepa-

The secondary output voltage of transformer T1 is

rate circuits, thus permitting a total of 48 individual

fed to a voltage switching board with strapping options

circuits in one Delay Equalizer. Up to ten different

for either 6.3 or 20 volts AZ. At the secondary of

circuit types are used in the equalizers. All cir-

transformer T2, the 20 volt AC is connected for the

cuits are wired in line and have a characteristic im-

alarm supply. A second output of transformer T2 is

pedance of 75 Ohm unbalanced. All equalizer cir-

rectified by diodes CR3 and CR4, fed through filters

cuits were assembled, wired and calibrated in the

L1, Cl and applied to terminals W3A and W4B. The

field. The amplitude and delay distortion equaliza-

voltage from the secondary of transformer T3 is

tion was designed to meet the Interface requirements

rectified, filtered and distributed through fused lines

of the systemspecification after the entire Cable

as 212 VDC to terminals X7A and X8A. Each power

Subsystem had been tested in its final environment

circuit is monitored by an alarm circuit, In the T1

and under operational conditions.

circuit, relay K2 with it's diode bridge monitors the

4-7/(4-8 blank)