Leitch DPS-575

Description

The Leitch DPS-575 is a broadcast-quality digital processing synchronizer designed for use in analog, digital, or hybrid production facilities. Originally developed by Digital Processing Systems (DPS) and continued under the Leitch brand following the 2000 acquisition, the DPS-575 combines frame synchronization, time base correction, format transcoding, and audio/video processing in a single 1U rackmount chassis.

The unit 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. Its auto-sensing dual-standard capability supports both PAL and NTSC without manual switching.

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-575 employs a 12-bit adaptive 3-dimensional comb filter decoder featuring Leitch's proprietary Phase Quadrature Mixing (PQM) technology, which virtually eliminates cross-luminance and cross-chrominance artifacts from composite sources. This processing can also be applied to component sources that were originally decoded by less sophisticated equipment, improving quality and reducing MPEG encoding bandwidth requirements.

The integrated framestore supports still image storage with linear keying, enabling logo insertion and source identification. Multiple logos can be stored in RAM, with optional animated logo capability available.

Available in video-only (DPS-575) and audio/video (DPS-575AV) configurations, as well as "LC" variants without front panel controls for remote-operated installations.

Photos

Specifications

Video Processing

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 3.58/4.43 MHz)
Signal-to-Noise (TSG/SDI)	>75 dB luminance weighted
Signal-to-Noise (Sync Mode)	>70 dB luminance weighted
Signal-to-Noise (TBC Mode)	>62.7 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

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)	300 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

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)	300 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

Control	Range
Video Level	±3 dB
Setup Level	±20 IRE
Chroma Level	±6 dB
Hue Phase	±45° to ±90°
Horizontal Adjustment	0 to 63.5 µs
Horizontal Genlock Delay	-18.52 ns to +13.89 ns
Vertical Line Advance	Normal or 1 line early
Vertical Timing	1 line adv./0–524 lines (NTSC), 0–624 lines (PAL)
Subcarrier Genlock Timing	360°
Input Y/C Delay	-1185 ns to +1111 ns

Audio Specifications (DPS-575AV)

Parameter	Specification
Processing Resolution	24-bit
Sampling Frequencies	32, 44.1, 48, 64, 88.2, 96 kHz
Maximum Total Delay	1.75 seconds (at 48 kHz)
Delay Resolution	<1 ms
Frequency Response	50 Hz to 20 kHz (±0.05 dB)
THD+N	<0.005% (typical at +21 dBu, 1 kHz)
Dynamic Range	>90 dB
Signal-to-Noise	>70 dB (full scale output)
Channel Separation	>85 dB
Analog Input Impedance	600Ω or 18kΩ
Maximum Analog Level	+24 dBu
AES/EBU Resolution	24-bit, up to 96 kHz
SDI Embedded Resolution	20-bit, 48 kHz synchronous

General

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)
GPI	2× input (RCA), 1× output (RCA)

Model Variants

Model	Description
DPS-575	Video-only synchronizer (PAL/NTSC auto-switch)
DPS-575AV	Integrated audio/video synchronizer
DPS-575LC	Video-only without front panel controls
DPS-575LCAV	Audio/video without front panel controls

Options

Part Number	Description
AS-575	Four-channel digital audio synchronizer module (upgrades DPS-575 to DPS-575AV)
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 (PAL/NTSC)
AL-475	Animated logo option (NTSC)
AL-575	Animated logo option (PAL)
DVM-5010	DV I/O module (IEEE-1394)
RC-575	Multi-channel remote panel with Ethernet
774-470A	Audio breakout cable with XLR and BNC connectors

Remote Control

The DPS-575 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
GPI — Two TTL/contact closure inputs and one TTL pulse output

Multiple DPS-575 units can be networked and controlled from a central location using the optional RC-575 remote panel or standard TCP/IP networking.

Applications

The DPS-575 is designed for:

Edit suites — Format translation, level adjustment, TBC control, and automatic voice-over insertion
Broadcast facilities — Bridging analog satellite/microwave feeds to digital production systems
Post-production — Noise reduction, MPEG pre-processing, and format transcoding
News operations — Consumer DV translation to broadcast formats with quality enhancement
Transmitter sites — Emergency switching with trouble slide and voice-over capability