TXN-2113 TRANSCODER NTSC TO Y,R-Y,B-Y
GENERAL:
The TXN-2113 transcoder is designed to provide a component output from an NTSC composite video
source. The NTSC video signal connects to the BNC jack labeled “VIDEO IN”. This is a looping input and
requires termination into a 75
Ω
load. The output is provided on the BNCs labeled “OUTPUTS Y, B-Y, R-Y”.
This module must be installed in a Sigma Frame for proper operation. Power is provided by the power
supply within the frame. A Sigma frame is designed to accommodate any 2100 Series module. This allows the
TXN-2113 to be resident with any other Sigma 2100 Series module in a common frame.
POWER:
The TXN-2113 operates from bus voltages of unreg20 VDC and -20 VDC. These voltages are
supplied by the Sigma frame / power supply. The modules use three pin regulators to regulate the bus
voltages to +5 VDC via U3 and -5 VDC via U6. Circuit protection is provided by PTC Thermistors (Positive
Temperature Coefficient Thermal Resistor) which open the current path during an excessive current draw
condition. Serving as a permanent fuse the PTC Thermistor will reset upon correction of the fault.
FRAMES:
The TXN-2113 module can reside in any of four different frames provided by Sigma Electronics, Inc. If this
module is purchased as a component of a system, please refer to the SERIES 2100 FRAMES Instruction
Manual. If the module was purchased separately, an existing frame must be present for proper operation.
Sigma would like to emphasize the fact that any of the Series 2100 modules can be mixed in any frame.
When assembled in the SSB-21 Stand-Alone Box, it is assigned the model number TXN-2613. This is a
single slot desk top box.
The SS-2100-2 frame is also designed for desk top applications. This frame provides two (2) slots for dual
module configurations.
The SS-2100-6 frame is designed for 19 inch EIA rack installations. It provides six (6) slots for modules in
1 rack unit of space.
The SS-2100-16 frame is also available for installations in a 19 inch EIA rack. This frame provides sixteen
(16) slots for modules within 3 RU.
Additional information on the various frames is available. Please refer to the special section on frames if
this was purchased as a complete system. If this information is not provided with this shipment, contact Sigma
Electronics for assistance.
CONNECTIONS:
Wiring to the module is performed via BNC connectors (Figure 1).
INPUT: There is a looping input on the rear panel of the unit. The INPUT is a high impedance
configuration. This allows the NTSC source signal to loop to other units. To ensure proper impedance
matching it is necessary to terminate the input with a 75
Ω
load at the end of line.
OUTPUT: There are three output BNCs on the rear panel of the unit. The silk-screen designates each
output signal.
REAR PANEL CONNECTIONS
Figure 1
Page 1 of 2 TXN-2113
TXN
2113
VIDEO IN
OUTPUTS Y B-Y R-Y
