DMD-2105
DIGITAL VIDEO
DISTRIBUTION AMPLIFIER
with ANALOG MONITORING
INSTRUCTION MANUAL
SIGMA ELECTRONICS, INC.
P.O. Box 448
1027 COMMERCIAL AVE.
EAST PETERSBURG, PA 17520-0448
(717) 569-2681
DMD-2105 SERIAL DIGITAL VIDEO DISTRIBUTION AMPLIFIER
GENERAL:
The DMD-2105 is a 1 input x 4 output Serial Digital Video distribution amplifier with an NTSC/PAL monitoring
output. The distribution amplifier provides four outputs from a SMPTE 259M-C input. This module is equipped with
equalization and reclocking circuitry, therefore cable runs up to 1000 feet on the input are possible.
The module also provides a composite video monitoring output. This enables the viewing of the 270 Mb/s input
signal on a composite video monitoring device such as a waveform monitor, oscilloscope or standard video monitor.
POWER:
The DMD-2105 operates from bus voltages of unregulated +20 VDC and -20 VDC. These voltages are supplied by
the Sigma frame/power supply. The module regulates the bus voltage to +5 VDC via the regulator U3 and -5 VDC via
the regulator U2. Circuit protection is provided by RT3 and RT4. These PTC Thermistors (Positive Temperature
Coefficient Thermal Resistors) serve as permanent, self resetting, fuse devices. In the event of excessive current draw,
on either of the bus lines, the PTC on the line will open. Upon correction of the fault, the PTC Thermistor will cool to an
operational temperature and reset.
FRAMES:
The DMD-2105 module can reside in any of four (4) 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, a preexisting frame must be present for proper operation. Sigma would like to
emphasize the fact that any of the Series 2100 modules can be installed with any other Series 2100 module within the
Series 2100 frames.
♦ In addition to the frames listed below, the module can be inserted into the SSB-21 Stand-Alone box. When
purchased in this configuration it is designated as DMD-2605
♦ The SS-2100-2 frame is designed for desk-top applications. This frame provides two (2) positions for two single
slot modules or a single two slot module. An optional tray (RMT-2100-2A) is available for rack installations.
♦ The SS-2100-6 frame is designed for 19 inch EIA rack installations. It provides six (6) slots for modules in 1 RU.
♦ The SS-2100-12+ frame provides a redundant power supply in a 3 RU frame for 19 inch EIA rack installations. This
frame has thirteen (13) slot positions for modules.
♦ The SS-2100-16+ frame is also available for installations in a 19 inch EIA rack. This frame provides seventeen (17)
slots for module within 3 RU.
Additional information on the various frames are 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 the connectors located on the rear panel. BNC connectors are used for the
Input, four (4) distribution amplifier outputs and composite video monitoring output. Each output is designed to drive a
75Ω load. The utilized outputs must be terminated by a single end of line 75Ω termination to ensure proper signal level.
Unused outputs do not require a 75Ω load.
D
M
D
2
1
0
5
1
INPUT
2
3
OUTPUTS
REAR PANEL CONNECTIONS
Figure 1
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4
C
O
M
P
DMD-2105 SERIAL DIGITAL VIDEO DISTRIBUTION AMPLIFIER
CONFIGURATION:
Set switch S1 to select the desired composite output format.
Composite Video Selection
NTSC
PAL-M
PAL-B,G,H,I
PAL-N
S1-1
OFF
ON
OFF
ON
S1-2
OFF
OFF
ON
ON
Set switch S1 to select setup on the composite output.
Composite Video Selection
Setup Off
Setup On
S1-3
OFF
ON
SPECIFICATIONS:
DIGITAL VIDEO INPUT:
VIDEO INPUT: .....................................
INPUT RETURN LOSS: .......................
DATA RATE: ........................................
INPUT CABLE LENGTH: .....................
CONNECTOR: ..................................
1, Single-ended, terminated 75Ω, SMPTE 259M-C, 800 mVp-p
15dB minimum, 5 MHz to 270 MHz
270 Mb/s
1000 feet maximum of BELDEN 1694A (or equivalent)
75Ω BNC
DIGITAL VIDEO OUTPUT:
DISTRIBUTION OUTPUT SIGNAL: .....
OUTPUT RETURN LOSS: ...................
OVERSHOOT: .....................................
CONNECTORS: ...................................
4 Outputs, 800 mVp-p typical, ±10%
15 dB minimum, 5 MHz to 270 MHz
Maximum10% of total amplitude
75Ω BNC
ANALOG VIDEO OUTPUT:
MONITORING OUTPUT: .....................
DIFFERENTIAL GAIN: .........................
DIFFERENTIAL PHASE: ......................
TILT FIELD AND LINE: .......................
CONNECTOR: ...................................
1, 1.4 Vp-p max. NTSC/PAL composite video
1% maximum
1° maximum
1% maximum
75Ω BNC
ENVIRONMENTAL:
OPERATIONAL TEMPERATURE: ...... 0° to 50° C (+32° to +122° F)
MECHANICAL:
SIZE: ...................................................
1 card slot, consumes one position within a Sigma frame.
All specifications, drawings, dimensions, weights and other details are subject to change without notification.
Information is intended to give a general performance and operation guideline of the product.
Sigma Electronics, Inc.; P.O.Box 448; 1027 Commercial Ave.; East Petersburg, PA 17520-0448
Main Office: Tel: (717) 569-2681 Fax: (717) 569-4056
REV0 MAY03
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DMD-2105
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