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IQDNC31 Dual 3G/HD Down Converter with Frame Sync

The IQDNC31 provides two channels of multirate downconversion for 3 Gb/s SDI and HD-SDI digital video signals. Using high-quality motion adaptive de-interlacing and flexible scaling technology, the IQDNC31 is a broadcast-quality conversion module ideal for space constrained applications requiring downconversion to maintain SD output feeds.

IQDNC31 includes frame synchronizers, capable of referencing to a SD bi-level or HD tri-level reference and independent variable aspect ratio converters with frame accurate reading and writing of WSS, VI and 2016 AFD signaling. Audio handling includes audio channel routing, delay adjustment and level controls. Video metadata such as timecode,...

FEATURES

  • High-quality downconversion for SDI video inputs including conversion aperture control
  • Frame synchronizer with HD tri-sync/SD bi-level reference input and input loss detection
  • Aspect ratio conversion including preset ARC maps relative to conversion modes, selectable pan, tilt, aspect, size, and output crop adjustments
  • Aspect ratio control (signaling reading and writing) using ETSI WSS and AFD Video Index signaling (RP186, SMPTE ST 2016)
  • Video processing features include: gain, offset, hue, horizontal and vertical picture enhancement, and RGB gamut legalization
  • Metadata support — Closed caption passing or processing for CEA608/708, and WST/OP42 and OP47 teletext captions, and VITC or SMPTE ST 12 timecode translation
  • Built-in test pattern generator and 19 character scrolling caption generator
  • Additional processing options including noise reduction (adaptive spatial and recursive) and linear frame rate conversion
  • Processing for 16 channels of embedded audio present on the incoming SDI stream with no disturbance during video synchronizer frame wraps or drops
  • Audio processing features including: channel routing, gain, invert, delay and tone generator
  • Non-PCM processing features pair level routing and delay compensation. Dolby-E data is passed with a delay to match the video and with co-timed audio frame drop or repeat
  • Dolby E support — Detection of PCM/non-PCM audio to SMPTE ST 337/338, pair routing and Dolby E header re-alignment
  • 16x user memories and 2 GPI/O ports
  • RollCall control and monitoring compatible with standard logging and reporting features
  • RollTrack triggers available for detected module states including input loss and reference loss

SPECIFICATIONS

Inputs & Outputs

Video Signal Inputs
SDI inputs: 2x

Input cable length:

  • Up to 80m Belden 1694A @ 3 Gb/s
  • Up to 120m Belden 1694A @ 1.5 Gb/s
  • 100m typical (with output set to 1080p rates), Belden 1694A @ 270 Mb/s


Input standard (auto detect):

  • 625(576)/25i, 525(480)/29i
  • 720 50/59p1080 50/59i
  • 1080 50/59p level A/B
  • 1080 25/29psf


Analog reference:

  • 1x analog reference with passive loop-through
  • Black (HD tri-level and SD bi-level) and Black Burst (SD bi-level)
  • SD bi-level – RS170A
  • HD tri-level – SMPTE ST 240, SMPTE ST 274


Video Signal Outputs
SDI outputs: up to 5 (3 from Channel 1, 2 from Channel 2)
Output standard: 625(576)/25i, 525(480)/29i

Control Interface
GPI: 2x closing contact I/O interface (ST) (rear panel dependent)

 

Conversion Functions (per channel)

Modes:

  • Downconversion
  • Aspect ratio conversion synchronization


Conversion processing:

  • Still process: Detects still images and applies an aperture with full (progressive) vertical frequency response
  • Enhanced still: Adds field motion detection to still process. Prevents artifacts on moving repetitive patterns


Aspect ratio conversion: AFD (SMPTE ST 2016), VI (RP186), WSS (L23) (manual or auto)
SD input format: Normal 4:3, Anamorphic 16:9, Letterbox 14:9, Letterbox 16:9
SD output format: Normal 4:3, Anamorphic 16:9, Letterbox 14:9, Letterbox 16:9
Metadata:

  • Closed caption CE608 <> CE708
  • Timecode conversions
  • Teletext subtitles WST/RDD8 conversion
Audio Functions (per channel)

Embedded audio:

  • 16-channel embedded audio processing
  • PCM audio processing includes channel level gain and delay compensation, as well as channel level routing with L/R swap and phase invert feature
  • Non-PCM processing features pair level routing and delay compensation. Dolby E data is passed with a delay to match the video and with co-timed audio frame drop or repeat


Embedded audio: Enable/Blank

Embedded Audio Routing
Processed pair 1-8: Disembed 1-8
Output Channels 1-16: Processed pair 1-8, Tone, Silence

Processed Audio Control
Invert Phase: Channels 1-16

Pair 1 to 8 Gain L/R: +18 dB to -18 dB in 0.1 dB steps

Pair 1-8 Manual Delay: -40 to +200 ms in 1 ms steps

Global Manual Delay: -40 to +200 ms in 1 ms steps

Dolby-E
Dolby-E Auto
Alignment: ±10 line offset in 1 line steps

Tone
Frequency: 100 Hz to 10 kHz in 100 Hz steps

Processing Functions (per channel)

Ancillary Data: Pass/Strip

Freeze: On/Off

Legalizer: On/Off

Genlock: Reference lock, Input lock (same format), Free run

Pattern: Off, Black, Ramp, Bars

Caption: On/Off, Scrolling

Edit Caption: 19 characters available

Proc Amp
Black Level: +100 to -100 mV (0) in 0.8 mV steps

Contrast: -6 dB to +6 dB (0) in 0.2 dB steps

Saturation: -6 dB to +6 dB (0) in 0.2 dB steps

Y Gamma: 0.4 to 1.7 (1) in 0.1 steps

YC Offset: -20 to 20 (0) in 2 Luma pixel steps
Note: Defaults shown in brackets

Enhancement

  • Nonlinear Enhancer:
  • Frequency Band Selection: Low, Med, High
  • Four preset enhancement modes: Low, Med, High, Super
  • Manual enhancement mode with H Gain and H Noise rejection levels


Conversion Aperture
Vertical:

  • Frequency Band Selection: Low, Med, High
  • Five vertical preset enhancement levels: Soft 2, Soft 1, Normal, Sharp 1, Sharp 2


Horizontal:

  • Five horizontal preset sharpness levels: Low 2, Low 1, Normal, High 1, High 2
  • Five horizontal preset detail levels: Soft 2, Soft 1, Normal, Sharp 1, Sharp 2


Other Controls
GPI input Low/High Select: Black, Freeze, Pattern, User Memories 1-16

GPI Output Source: Black, Freeze, Pattern

User Memories: 16x Save, Recall, Rename

Memory Naming: User configurable naming of memories 1 – 16

RollTrack Index: Up to 50 RollTrack destinations RollTrack Sources: Unused, Input Present (1 & 2), Input Loss (1 & 2), Reference OK & Loss

Information Window: Video Input Status, Reference Status

Factory Default: Resets all module settings to factory specified default values and clears memories

Default Settings: Resets all module settings to factory specified defaults but does not clear memories

Module Information: Reports following module information — Software version, Serial number, Rear Panel ID, Frame Slot

 

General Specifications

Electrical: 3 Gb/s SDI, SMPTE ST 424 1.5 Gb/s HD-SDI, SMPTE ST 292 270 Mb/s SDI, SMPTE ST 259-C

Connector/format:
BNC/75Ω panel jack on standard IQ connector panel

Return loss:
>-15 dB (270 Mb/s, 1.5 Gb/s) >-10 dB (3 Gb/s)

Output jitter:
SD-SDI 0.2 UI (10 Hz) / 0.2 UI (1 kHz)

Reference source:
External – HD tri-Level / SD bi-level / input video syncs

Electrical

  • Black (HD tri-level and SD bi-level) and Black Burst (SD bi-level)
  • SD bi-level – RS170A
  • HD Tr-level – SMPTE ST 240 and SMPTE ST 274


Connector/format: BNC/75 ohm panel jack on standard IQ connector panel

Embedded Audio Handling

  • HD – 24-bit synchronous 48 kHz to SMPTE ST 299
  • SD – 20-bit synchronous 48 kHz to SMPTE ST 272-A


Power Consumption
Module power consumption: 16 PR (B frames)

ORDERING INFORMATION

IQDNC3100-1B3
Dual channel downconverter. 2 SDI inputs, external reference loop & enclosure reference inputs, 4 SDI outputs

IQDNC3101-1B3
Dual channel downconverter. 2 SDI inputs, 5 SDI outputs,
2 GPI/Os, reference inputs from enclosure

For more details on enclosure types please refer to the IQ Modular Enclosures datasheet.

Software Options
IQOPTM-2NR – Software option to add noise reduction on both channels

IQOPTM-2LC –
Software option to upgrade with linear frame rate conversion on both channels

IQOPTM-2UDC –
Software option for upgrade to up, down and cross conversion for both processing channels

Note: Single channel licenses can also be loaded

DOCUMENTS & DOWNLOADS

DATASHEETS

IQDNC31: Dual-channel 3G/HD-SDI Downconverter with Frame Synchronizer Datasheet

The IQDNC31 provides two channels of multirate downconversion for 3 Gb/s SDI and HD-SDI digital video signals.

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