Arclight-MCP-Bot: Convert to structured AV input/output/TBC/voltage range templates; replace freeform video_inputs/outputs/audio_inputs/outputs/signal_standard/power fields with proper form-compatible fields (via update-page on MediaWiki MCP Server)

2026-02-19T21:14:22Z

Convert to structured AV input/output/TBC/voltage range templates; replace freeform video_inputs/outputs/audio_inputs/outputs/signal_standard/power fields with proper form-compatible fields (via update-page on MediaWiki MCP Server)

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Arclight-MCP-Bot: Update to merged TBC/FS category (via update-page on MediaWiki MCP Server)

2026-02-01T21:25:12Z

Update to merged TBC/FS category (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 21:25, 1 February 2026
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	* [[Digital Processing Systems DPS-290]]		* [[Digital Processing Systems DPS-290]]
	* [[Leitch]]		* [[Leitch]]
			* [[:Category:Time base correctors and frame synchronizers\|Time base correctors and frame synchronizers]]

	[[Category:Leitch AV devices]]		[[Category:Leitch AV devices]]
	~~[[Category:Frame synchronizers]]~~		[[Category:Time base correctors and frame synchronizers]]
	[[Category:Time base correctors]]

Arclight-MCP-Bot: Creating page for the Leitch DPS-475 digital processing synchronizer (via create-page on MediaWiki MCP Server)

2026-01-29T17:52:36Z

Creating page for the Leitch DPS-475 digital processing synchronizer (via create-page on MediaWiki MCP Server)

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{{AV device
|brand=Leitch
|model_code=DPS-475
|device_type=Frame synchronizer
|image_main=Leitch DPS-475.jpg
|images=Leitch DPS-475 front angle.jpg,Leitch DPS-475 back.jpg,Leitch DPS-475 left side.jpg,Leitch DPS-475 right side.jpg,Leitch DPS-475 top.jpg,Leitch DPS-475 bottom.jpg
|year_released=2000
|signal_standard=NTSC
|video_inputs=Composite (BNC), Component Y/R-Y/B-Y (BNC), S-Video (Mini-DIN-4), SDI (BNC), DV/IEEE-1394 (6-pin Molex, optional)
|video_outputs=Composite (BNC ×2), Component Y/R-Y/B-Y (BNC), S-Video (Mini-DIN-4), RGB/RGBS (BNC), SDI (BNC ×2), DV/IEEE-1394 (6-pin Molex, optional)
|audio_inputs=2× Stereo analog (balanced/unbalanced, barrier strip), 2× AES/EBU stereo (BNC via breakout), SDI embedded (2 stereo via SDI input)
|audio_outputs=2× Stereo analog (balanced/unbalanced, barrier strip), 2× AES/EBU stereo (BNC via breakout), SDI embedded (2 stereo via SDI output)
|features=12-bit video encoder/decoder, adaptive 3D comb filter with PQM technology, DigiDuplex bi-directional analog/digital interface, video framestore with linear keyer, 30+ test pattern generator, VITS/VIRS inserter, video AGC, audio test signal generator (4 channels), genlock with timing adjustment, proc amp controls, optional digital noise reduction, optional animated logo inserter, optional DV (IEEE-1394) I/O, optional audio limiter
|description=The '''Leitch DPS-475''' is a broadcast-quality digital processing synchronizer designed for NTSC-only operation. Originally developed by [[Digital Processing Systems]] (DPS) and continued under the Leitch brand following the 2000 acquisition, the DPS-475 is '''hardware identical''' to its multi-standard sibling, the [[Leitch DPS-575|DPS-575]], but is software-locked to operate only with NTSC signals.

The unit combines frame synchronization, time base correction, format transcoding, and audio/video processing in a single 1U rackmount chassis. It serves as a universal bridge between analog and digital video systems, accepting composite, S-Video, component analog, SDI, and optionally DV (IEEE-1394) inputs while providing simultaneous outputs in all formats.

A key innovation is the DigiDuplex mode, which enables bi-directional connectivity between analog tape machines and digital routing systems. This allows the SDI input to feed analog outputs (for recording to an analog VTR) while simultaneously accepting the VTR's analog output, processing it, and outputting via SDI—all in a single unit.

The DPS-475 employs a 12-bit adaptive 3-dimensional comb filter decoder featuring DPS's proprietary Phase Quadrature Mixing (PQM) technology, which virtually eliminates cross-luminance and cross-chrominance artifacts from composite sources. The integrated framestore supports still image storage with linear keying, enabling logo insertion and source identification.

Available in video-only (DPS-475) and audio/video (DPS-475AV) configurations, as well as "LC" variants without front panel controls for remote-operated installations.
|height=1.75 in
|width=17 in
|depth=20 in
|weight=
|power_voltage=100-240V AC
|power_wattage=70W
}}

== Relationship to DPS-575 ==

The DPS-475 is '''hardware identical''' to the [[Leitch DPS-575|DPS-575]]. The only difference is a software lock that restricts the DPS-475 to NTSC operation, whereas the DPS-575 supports auto-sensing dual-standard PAL/NTSC operation.

According to discussions in the laserdisc community, it is reportedly possible to convert a DPS-475 to a DPS-575 via firmware flashing, effectively unlocking PAL support. This involves uploading DPS-575 firmware to the unit. See [https://forum.lddb.com/viewtopic.php?t=4502&p=72668 this LDDB forum thread] for details.

== Specifications ==

=== Video Processing ===

{| class="wikitable"
! Parameter !! Specification
|-
| ADC/DAC Resolution || 12-bit
|-
| Component Pipeline || 10-bit YUV
|-
| Synchronizing Range || Infinite
|-
| Frequency Response (Sync Mode) || ±0.25 dB (0–5.5 MHz), -1 dB (5.5–5.75 MHz)
|-
| Frequency Response (TBC Mode) || -3 dB (0–4.2 MHz, notch at 3.58 MHz)
|-
| Signal-to-Noise (TSG/SDI) || >75 dB luminance weighted
|-
| Signal-to-Noise (Sync Mode) || >70 dB luminance weighted
|-
| Signal-to-Noise (TBC Mode) || >60 dB luminance weighted
|-
| Differential Phase || <1° (modulated ramp)
|-
| Differential Gain || <1% (modulated ramp)
|-
| K-Factor (2T) || <0.5%
|-
| Luminance Jitter (TBC Mode) || <15 ns
|}

=== Video Inputs ===

{| class="wikitable"
! Input !! Specification
|-
| Composite Video (BNC) || 1V p-p, 75Ω
|-
| Component Y (BNC) || 1V p-p, 75Ω
|-
| Component R-Y/B-Y (BNC) || 0.7V p-p, 75Ω
|-
| S-Video Y (Mini-DIN-4) || 1V p-p, 75Ω
|-
| S-Video C (Mini-DIN-4) || 286 mV burst (NTSC)
|-
| SDI (BNC) || 75Ω, auto EQ to 300m, reclocked/buffered loop output
|-
| DV (6-pin Molex, optional) || IEEE-1394
|-
| Genlock Reference (BNC loop) || 1V p-p, 75Ω
|}

=== Video Outputs ===

{| class="wikitable"
! Output !! Specification
|-
| Composite Video (BNC ×2) || 1V p-p, 75Ω
|-
| Component Y (BNC) || 1V p-p, 75Ω
|-
| Component R-Y/B-Y (BNC) || 0.7V p-p, 75Ω
|-
| S-Video Y (Mini-DIN-4) || 1V p-p, 75Ω
|-
| S-Video C (Mini-DIN-4) || 286 mV burst (NTSC)
|-
| RGB (BNC) || 1V p-p, 75Ω
|-
| RGBS Sync (BNC) || 300 mV or 8V p-p (selectable)
|-
| SDI (BNC ×2) || 75Ω
|-
| DV (6-pin Molex, optional) || IEEE-1394
|}

=== Proc Amp Controls ===

{| class="wikitable"
! Control !! Range
|-
| Video Level || ±3 dB
|-
| Setup Level || ±20 IRE
|-
| Chroma Level || ±6 dB
|-
| Hue Phase || ±45°
|-
| Horizontal Genlock Timing || ±6 µs
|-
| Subcarrier Genlock Timing || 360°
|-
| Input Y/C Delay || -592 ns to +518 ns
|}

=== Audio Specifications (DPS-475AV) ===

{| class="wikitable"
! Parameter !! Specification
|-
| Processing Resolution || 24-bit
|-
| Analog Input Sampling Rate || 32, 44.1, 48 kHz
|-
| Maximum Analog Level || +24 dBu
|-
| Analog Input Impedance || 600Ω or 18kΩ
|-
| Operating Levels || +8, +4, 0, -4, -10 dBu
|-
| AES/EBU Resolution || 24-bit, up to 96 kHz
|-
| SDI Embedded Resolution || 20-bit, 48 kHz synchronous
|}

=== General ===

{| class="wikitable"
! Parameter !! Specification
|-
| Dimensions (W × H × D) || 17" × 1.75" × 20" (43.2 × 4.4 × 50.8 cm)
|-
| Rack Height || 1U
|-
| Power || 70W, 100–240 VAC, 50/60 Hz
|-
| Remote Control || RS-232/RS-422 (DB-9F), Ethernet 10Base-T (RJ-45), DCN (BNC)
|-
| GPI || 2× input (on breakout cable), 1× output (on breakout cable)
|}

== Model Variants ==

{| class="wikitable"
! Model !! Description
|-
| DPS-475 || Video-only synchronizer (NTSC only)
|-
| DPS-475AV || Integrated audio/video synchronizer (NTSC only)
|-
| DPS-475LC || Video-only without front panel controls
|-
| DPS-475LCAV || Audio/video without front panel controls
|}

=== Options ===

{| class="wikitable"
! Part Number !! Description
|-
| AS-575 || Four-channel digital audio synchronizer module (upgrades DPS-475 to DPS-475AV)
|-
| AS-575L || Audio synchronizer module with audio limiter
|-
| ASL-575 || Audio limiter option (requires existing AS-575)
|-
| NR-575 || Digital noise reduction and bandwidth filter
|-
| AL-475 || Animated logo option (NTSC)
|-
| DVM-5010 || DV I/O module (IEEE-1394)
|-
| RC-475 || Multi-channel remote panel
|-
| RC-4000 || Multi-channel remote panel with Ethernet
|-
| 774-753 || Video breakout cable
|-
| 774-755 || Audio breakout cable
|}

== Test Signals ==

The DPS-475 includes over 30 built-in 10-bit test patterns for NTSC:

# SMPTE Bars
# EIA Bars
# Full Field Bars
# Bars / Luma
# Bars / Reverse
# Bars / Red
# Bars 100%
# Super Black

''(Plus additional multiburst, pulse & bar, and specialized test patterns)''

== Remote Control ==

The DPS-475 supports multiple remote control methods:

* '''Serial''' — RS-232 or RS-422 via DB-9F connector at 9600 or 38400 bps
* '''Ethernet''' — 10Base-T for LAN/WAN control via web browser or Leitch PILOT GUI software
* '''DCN''' — Proprietary DPS serial control network (BNC)
* '''GPI''' — Two TTL/contact closure inputs and one TTL pulse output (via breakout cable)

Multiple DPS-475 units can be networked and controlled from a central location using the optional RC-475 or RC-4000 remote panels.

== Documents ==

* [[Document:1769707354-8931|DPS-475/DPS-575 Service Manual]]

== See Also ==

* [[Leitch DPS-575]] — Multi-standard (PAL/NTSC) version
* [[Digital Processing Systems]]
* [[Digital Processing Systems DPS-290]]
* [[Leitch]]

[[Category:Leitch AV devices]]
[[Category:Frame synchronizers]]
[[Category:Time base correctors]]

Leitch DPS-475 - Revision history

Arclight-MCP-Bot: Convert to structured AV input/output/TBC/voltage range templates; replace freeform video_inputs/outputs/audio_inputs/outputs/signal_standard/power fields with proper form-compatible fields (via update-page on MediaWiki MCP Server)

Arclight-MCP-Bot: Update to merged TBC/FS category (via update-page on MediaWiki MCP Server)

Arclight-MCP-Bot: Creating page for the Leitch DPS-475 digital processing synchronizer (via create-page on MediaWiki MCP Server)