Miranda dec-291p Instruction Manual

GUIDE TO INSTALLATION AND OPERATION
DEC-291p
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GUIDE TO INSTALLATION AND OPERATION
DEC-291p
CONTENTS
page
1.0 DEC-291p 12-bit NTSC/PAL/SECAM to SDI
decoder…........................................…… 1
1.1 Introduction ………………………............. 1
1.2 Features .........................................…….. 1
2.0 Physical Layout………….......................... 2
3.0 Installation .......................................... 3
3.1 Power Supply .......................................... 3
3.2 Composite Input ……..……….................. 3
3.3 SDI Output ……………….……............... 3
4.0 Operation ............................................ 4
4.1 Switch Settings ....................................... 4
4.2 Status LED ………………………............... 5
5.0 Specifications ................………..……. 6

GUIDE TO INSTALLATION AND OPERATION
DEC-291p

GUIDE TO INSTALLATION AND OPERATION
DEC-291p | 1
1.0 DEC-291p 12-bit NTSC/PAL/SECAM to SDI
decoder
1.1 Introduction
The Picolink DEC-291p Composite Decoder is the world’s
smallest NTSC/PAL/PAL-N/PAL-M/SECAM decoder, facilitating
the interface between analog composite video and the serial SDI
video signal, particularly in monitoring applications. This module
automatically detects 525 or 625 line formats from incoming
composite video signals and provides the appropriate serial SDI
output format. Its simplified design makes it easy to install and
operate.
DecoderCOMPOSITE IN SDI OUT
Parallel
to serial
Figure 1: DEC-291p functional block diagram
1.2 Features
Automatic input detection of NTSC, PAL and SECAM
composite signals
SDI output
Superior quality 12-bit processing
Input setup selection: 7.5 or 0 IRE
Input signal stability selection: VTR, Tuner (satellite), and
Studio
Bi-color LED providing error status on input composite
signal
Very small packaging with aluminum extruded body

GUIDE TO INSTALLATION AND OPERATION
2| DEC-291p
2.0 Physical Layout
Figure 2 illustrates the DEC-291p’s major parts and their
locations. The video source is connected to the composite input
BNC and the decoded signal is provided by the SDI output.
Error status is provided by the status LED and mode settings are
configured by two 3-position slide switches. Finally, the power
source is connected to the power connector.
SDI output
Power connector
Composite input Status LED
(underneath)
3-position slide switches
Figure 2: Layout of the DEC-291p

GUIDE TO INSTALLATION AND OPERATION
DEC-291p | 3
3.0 Installation
3.1 Power Supply
The LKS-WSU power supply is used to power the DEC-291p for
both 110V and 220V operation. This power supply provides a
regulated +5 VDC@1A power source over an input range of 90 –
260 VAC. The DEC-291p employs a mini XLR-3 connector for its
power needs. Figure 3 shows a detailed pinout of the male
connector.
13
2
(male connector-facing)
Pin 1: Shield
Pin 2: GND
Pin 3: +5 VDC
Figure 3: Power connector pinout
3.2 Composite Input
Connect an NTSC, PAL, PAL-M, PAL-N or SECAM composite
signal conforming to the SMPTE 170M or ITU-R BT.470-6
standard respectively to the BNC labeled COMPOSITE IN.
3.3 SDI Output
The SDI serial digital output signal is available at the BNC
labeled SDI OUT. The output signal conforms to the SMPTE
259M-C standard.

GUIDE TO INSTALLATION AND OPERATION
4| DEC-291p
4.0 Operation
4.1 Switch Settings
Figure 4 shows the location of the slide switches and the status
LED.
7.5 IRE 7.5 IRE 0 IRE VTR TUNER STUDIO
DEC-291p Miranda Technologies inc.
Made in Canada
Input setup (SW1)
Input stability (SW2)
picoLink
COMPOSITE
IN SDI OUT
Status LED
Figure 4: DEC-291p slide switch and LED locations
Input setup switch (SW1)
7.5 IRE: For composite sources with 7.5 IRE setup, set SW1
to this position.
7.5 IRE (same as above on this 3-position switch)
0 IRE: For composite sources with 0 IRE setup, set SW1 to
this position.
Input stability switch (SW2)
VTR: Select this position for non-time-base-corrected
sources.
Tuner: Decoding of satellite sources or sources with
unpredictable voltage levels is improved with the
Tuner setting.

GUIDE TO INSTALLATION AND OPERATION
DEC-291p | 5
Studio: Select this position when using stable composite
sources.
4.2 Status LED
The bi-colored status LED identifies the presence of input errors.
Possible indications are:
Green: Indicates the DEC-291p is powered and has
detected a valid composite signal at the input.
Red: Indicates that the input is in error:
•no input signal has been detected
•an invalid input signal has been detected.
Off: The DEC-291p is not connected to a power supply.

GUIDE TO INSTALLATION AND OPERATION
6| DEC-291p
5.0 Specifications
Input
Signal: NTSC (SMPTE-170M)
PAL (ITU-R BT.470-6),
PAL-M (ITU-R BT.470-6)
PAL-N (ITU-R BT.470-6)
SECAM (ITU-R BT.470-6)
Return loss: > 35 dB up to 5 MHz
Connector: 75 ΩBNC
Output
Signal: SDI SMPTE 259M-C (270 Mbps)
Return loss: > 15 dB up to 270 MHz
Jitter: < 10 ns p-p
Connector: 75 ΩBNC
Processing performance
Signal Path: 10 bit
Quantization: 12 bits
Processing delay: 3.2 us
Sampling: 54MHz (4x oversampling)
Electrical
Voltage requirement: +5 VDC
Power consumption: 1.5 W
Power connector: Mini XLR-3
Mechanical
Overall size: 102 mm x 25 mm x 18 mm
(4” x 1” x 0.7”)
Power cable length: 127 mm (5”)
Full spec. temp. range: 0° C (32° F) to 30° C (86° F)