2
2. Indications and connectors
Table 1 lists the front panel features of TETRA 43x0
modules (refer to figure 1). Connector pin assignments
are detailed in section 6.
TETRA 43x0 TX
o
(SC/UPC connector)
Optical video/data out, optical
data in
o
(BNC connector) 1-8
Composite video in
TETRA 43x0 RX
o
(SC/UPC connector)
Optical video/data in,
optical data out
o
(BNC connector) 1-8
Composite video out
TETRA 43x0 TX and RX
(4x)
Front panel screws
AUDIO&DATA
(modular front panel sockets):
A1/CC1
audio 1, contact closure 1
A2/CC2
audio 2, contact closure 2
D1/D2
RS-485 (422)/ RS-232
D3/D4
RS-485 (422)/ RS-232
Status indicator LEDs
SYNC
(red)
(orange)
(green)
No sync from optical in,
or no internal sync
No sync @ remote opt. in
All sync OK
DC
(green)
DC power OK
NV
(red)
TX: no video in
RX: no video out
Note: They will always be OFF
when the transmit input clamp is
disabled.
*D1
S422/485/Manchester
(red/green)
If the data input is a steady logical
“1”, or if there is data activity, the
LED will be ON. The LED color
will follow the data, Red = 0/false,
and Green = 1/True
D2
RS232 ( red/green)
*D3
R4224/85/Manchester
(red/green)
D4
RS232 ( red/green)
10
(on Ethernet Port,
Amber)
ON with LINK at 10 Mbps, Blinks
with Activity
100 (
on Ethernet Port,
Green)
ON with LINK at 100 Mbps, Blinks
with Activity
3. Configuration
To access the internal set-up switches for the audio, data,
and Ethernet circuits, remove the four screws on the
front panel as indicated in figure 3, below, and slide out
the circuit card assemblies.
Contact Closures
There is no set-up required for
Contact Closure operation. Refer to fig. 4 for hook-up.
At the input, connect the input contacts between CC IN
and GND. When this connection is made at the input, the
CC OUT A and CC OUT B outputs at the far end are
connected together. If SYNC is lost, the contacts open.
Figure 3. Access to internal configuration switches and
jumpers
Data interface selection
: The four position D1/D3 SEL
dip switch (S4) settings determine whether the D1 and
D3 data ports operate in RS-422, RS-485 4W, RS-485
2W, or Manchester (Bi-phase) mode, per table 2.
In addition, properly setting the Four position LINE
BIAS, CONFIGURATION, AND TERMINATION dip
switches is essential for proper operation. See figure 2,
table 3, and the
R-S422, R-S485, and Manchester Line
Bias, Configuration, and Termination
section.
Figure 2. Location of configuration jumpers on the
Data/Audio/Ethernet Circuit Card. To access, see
“Configuration”, and figure 3.
Table 1. TETRA 43x0 front panel features
* If the D1 or D3 LED indicates steady Green when the
input is connected but no signal is being transmitted, either
the leads are reversed or, if not, the input bias (BR) should
be enabled.
