ACCURATE ELECTRONICS 104001C Manual - Halaman 2

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ACCURATE ELECTRONICS INC

WWW.ACCURATE.ORG

PO BOX 1654 97075-1654 8687 SW HALL BLVD 97008

opening jacks alone are provided at the terminal side ports. Front-panel

"SEAL CURR 1" and "SEAL CURR 2" LED's light when the module's

internal facility-side and terminal-side sealing-current options, respectively,

are activated and sealing current is flowing. Also located on the front-panel

is a "PWR ON" LED that lights when power is applied to the module.

1.09 An internally regulated power supply permits the module to operate on

filtered, ground-referenced –22 to –56VDC input. If the internal sealing

current optioned is selected, input power must be from –42 to –56VDC.

Maximum current requirements (at –48VDC inputs) are as follows:



With both sealing-current sources inactive, 30mA at idle and

65mA at maximum transmit and receive output levels.



With one sealing-current source active, 57mA at idle and 92mA

at maximum output levels.



With both sealing-current sources active, 84mA at idle and

132mA at maximum output levels.

1.10 Surge protection is provided for the input and output of the transmit and

receive amplifiers. Reverse-battery protection and transient limiting are

provided for the module's internal power-supply circuitry.

1.11 A Type-10 module, the 104001C mounts in one-position of an Accurate

Electronic Type-10 Mounting Shelf, versions of which are available for

relay-rack or apparatus-case installation. In relay-rack applications, up to 12

modules can be mounted across a 19-inch rack, while up to 14 modules can

be mounted across a 23-inch rack. The 104001C can also be used in the

Accurate 246 Resistive Data Bridge System, in which case the module

mounts in one position of the Accurate 246 Mounting Assembly. The 246

Assembly, basically a prewired Type-10 Shelf equipped with a connectorized

printed-circuit back-plane, houses up to 12 modules and mounts in a 19-inch

relay rack. The 246 Assembly and all rack-configured Type-10 Shelves each

occupy 6 inches of vertical rack space.

2. APPLICATION

2.01 The 104001C Prescription Line Amplifier with sealing current is

designed for use on 4wire voice-frequency transmission facilities, where it

provides active prescription level control, active prescription amplitude

equalization, and impedance matching in both the transmit and receive

FIGURE 3. Typical Off-Premises-Station (OPS) Circuit using 104001C Line Amplifiers.

FIGURE 5. Typical 4Wire DX Signaling Application Using 104001C Line Amplifiers.

This document contains proprietary information and is supplied for identification, maintenance, engineering evaluation or inspection purposes only and shall not be duplicated or disclosed without written

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Practice Section 104001C Rev B

BEAVERTON OR USA 503.641.0118

channels. The module also contributes longitudinal isolation and surge

protection for the facility. In itself, the 104001C module is equivalent to a

4wire-to-4wire (44V4) voice-frequency repeater.

Accurate 420X Terminating Set (or equivalent), a 2wire-to-4wire (24V4)

repeater results.

2.02 Because equalization is available in both channels (instead of in the

receive channel only), the 104001C can be used not only as a terminal

repeater but also as an intermediate repeater. Figure 3 shows a typical off-

premises-station (OPS) circuit in which the 104001C is used in a variety of

applications.

2.03 The 104001C can also be used in the Accurate 246 Resistive Data

Bridge System, where each module provides an active interface between an

external 4wire facility and the passive fixed-loss data bridge. Figure 4 shows

a typical configuration for two 4wire 6way fixed-loss data bridges.

FIGURE 4. Module Arrangement for two (2) 4Wire 6Way Resistive

Bridges in a n Accurate 246 Mounting Assembly.

Level Control

2.04 Prescription level-control circuitry allows from 0 to 24dB of gain or

loss to be introduced into each channel of the 104001C independently. For

each channel, either flat gain or flat loss is selected via a front-panel slide

January 2014

FAX 503.646.3903

When used with an