ACCURATE ELECTRONICS 104001C Руководство - Страница 2
Просмотреть онлайн или скачать pdf Руководство для Усилитель ACCURATE ELECTRONICS 104001C. ACCURATE ELECTRONICS 104001C 10 страниц. Prescription line amplifier
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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.
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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
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