ACCURATE ELECTRONICS INC
Practice Section 104003C Rev A January 2014
PO BOX 1654 97075-1654 8687 SW HALL BLVD 97008 BEAVERTON OR USA 503.641.0118 FAX 503.646.3903
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
permission of: ACCURATE ELECTRONICS INC By accepting this document the recipient agrees to make every effort to prevent unauthorized use of this information.
3
MOUNTING
3.02
The 104003C module mounts in one position of a Type-10 Mounting
Shelf, which is available in configurations for both relay rack and apparatus
case installation. The module plugs physically and electrically into a 56-pin
connector at the rear of the Type-10 Shelf.
INSTALLER CONNECTIONS
3.03
Before making any connections to the mounting shelf, make sure that
power is
off
and modules are
removed
. Modules should be put into place
only
after
they are properly optioned and
after
wiring is completed.
3.04
Table 1 lists external connections to the 104003C module. All
connections are made via wire wrapping to the 56-pin connector at the rear
of the module’s mounting shelf position. Pin numbers are found on the body
of the connector.
Table 1.
Installer Connections to 104003C
CONNECT
TO PIN
XMT TIP OUT
41
XMT OUT RING
47
XMT SIMPLEX OUT
43 and 45
RCV TIP IN
7
RCV RING IN
13
RCV SIMPLEX IN
9 and 11
XMT TIP IN
55
XMT RING IN
49
XMT SIMPLEX IN
51 and 53
RCV TIP OUT
5
RCV RING OUT
15
RCV SIMPLEX OUT
3
LOCAL LOOP (Key controlled loopback)
1
TEK5 (data set disable lead)
19
TEK6 (data set disable lead)
21
BATT (-22 to –56Vdc battery in)
35
GND (ground)
17
DSA POWER (used in 263 Data Station
Assembly packages)
37
Note:
In intermediate applications where simplex (SX) signaling is used
(see center 104003C in Figure 4), strap the simplex leads as follows: RCV
SIMPLEX IN (pin 9) to RCV SIMPLEX OUT (pin 3) and XMT SIMPLEX IN
(pin 51) to XMT SIMPLEX OUT (pin 43).
OPTION SELECTION
3.05
Option switches must be set before the 104003C is placed into service.
These switches and their functions are described in paragraphs 3.6 through
3.10. Locations of these switches on the module’s front panel and printed
circuit boards are shown in Figure 5.
CHANNEL OPTIONING
3.06 Levels.
The front panel Gain/Loss slide switches for the transmit and
receive channels conditions the corresponding channel amplifier to provide
either gain or loss. If gain is required, set the switch to the
GAIN
position. If
loss is required, set the switch to the
LOSS
position. The precise amount of
gain or loss is selected via the front-panel transmit level and receive level DIP
switches. The amount of gain or loss provided by each switch position
appears on the front panel of the module adjacent to each switch position (see
Figure 5). These values are additive; thus, the amount of gain or loss selected
is the sum of those switch positions set to
IN
.
EQUALIZATION
3.07
Two five-position DIP switches located on the front panel introduce
from 0 to 7.75dB of slope equalization in 0.25dB increments in both transmit
and receive channels. The various settings of both equalizers are shown in
Table 2.
Table 2.
Transmit and Receive channel equalized gain optioning.
Switch
positions
0.25
0.5
1.0
2.0
4.0
1000Hz*
gain
(dB)
Off
Off
Off
Off
Off
-
On
Off
Off
Off
Off
0.25db
Off
On
Off
Off
Off
0.5dB
On
On
Off
Off
Off
0.75dB
Off
Off
On
Off
Off
1.0dB
On
Off
On
Off
Off
1.25dB
Off
On
On
Off
Off
1.5dB
On
On
On
Off
Off
1.75dB
Off
Off
Off
On
Off
2.0dB
On
Off
Off
On
Off
2.25dB
Off
On
Off
On
Off
2.5dB
On
On
Off
On
Off
2.75dB
Off
Off
On
On
Off
3.00dB
On
Off
On
On
Off
3.25dB
Off
On
On
On
Off
3.5dB
On
On
On
On
Off
3.75dB
Off
Off
Off
Off
On
4.00dB
On
Off
Off
Off
On
4.25dB
Off
On
Off
Off
On
4.50dB
On
On
Off
Off
On
4.75dB
Off
Off
On
Off
On
5.00dB
On
Off
On
Off
On
5.25dB
Off
On
On
Off
On
5.5dB
On
On
On
Off
On
5.75db
Off
Off
Off
On
On
6.0dB
On
Off
Off
On
On
6.25dB
Off
On
Off
On
On
6.50dB
On
On
Off
On
On
6.75dB
Off
Off
On
On
On
7.0dB
On
Off
On
On
On
7.25dB
Off
On
On
On
On
7.50dB
On
On
On
On
On
7.75dB
*3000Hz equalized gain is twice 1000Hz level shown.
IMPEDANCE MATCHING
3.08
Two slide switches located on the main pcb select the input/output
impedances of the facility port (receive in/transmit out – S2) and the terminal
port (transmit in/receive out – S4). Each port may be set to impedances of
150 ohms, 600 ohms or 1200 ohms. See Figure 5 for location of these
switches.