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HD/SD-SDI Video Delay

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The 7743DLY-HD is a full function HD/SD-SDI Video Delay module designed for applications such as: satellite uplink, signal re-entry on master control inputs, at cable headends, mobile vehicle outputs, broadcast transmitter inputs, virtual sets and matching delays caused by multi-channel audio compression.

The 7743DLY-HD can act as a delay for SD video (SMPTE ST 259) or HD video (SMPTE ST 292-1).

The 7743DLY-HD is capable of up to 3.2 seconds of delay for HD and up to 16.5 seconds of delay for SD. With the broadcast environment in mind, the modules feature bypass relay protection on output.

The 7743DLY-HD occupies two card slots and can be housed in the 1RU 7801FR frame which holds up to four single or two dual slot modules, the 3RU 7800FR frame which has a 15 slot capacity, the portable 3RU 350FR frame which has a 7 slot capacity, or a standalone enclosure which holds a single module.


  • Full signal delay capability including VBI and ANC DATA for SMPTE ST 292-1 (1.5Gb/s) signals
  • Also supports full signal delay capability including VBI for SMPTE ST 259 (270Mb/s) signals
  • Delay programmable in video units (frames, lines and samples) or as time units (seconds)
  • Auto senses video standard
  • Bypass relay for program path protection on power loss
  • Up to 3.2 seconds delay for HD
  • Up to 16.5 seconds delay for SD
  • Card edge controls operate on screen menu system to program delay settings
  • Input circuit features a line buffer which is suitable for "de-glitching" hot switches on upstream equipment (very useful for HD equipment)
  • VistaLINK® capable for remote monitoring, control and configuration capabilities via SNMP; using VistaLINK® PRO, CP-2116E or CP-2232E Control Panels. VistaLINK® is available when modules are used with the 3RU 7800FR frame and a 7800FC VistaLINK® Frame Controller module in slot 1 of the frame


High Definition Serial Digital Video

Standard ST 292-1 (1.5GB/s) or SMPTE ST 259 (270MB/s)
Connector BNC per IEC 61169-8 Annex A
Equalization Automatic to 75m @ 1.5GB/s with Belden 1694A or equivalent cable
Return Loss > 15dB up to 1.0GB/s
> 10dB up to 1.5GB/s (with relay)

Standard Definition Serial Digital Video

Standard SMPTE ST 259-C (270MB/s)
Connector BNC per IEC 61169-8 Annex A
Return Loss > 15dB up to 270MB/s

Serial Video Outputs

Number of Outputs 1 with relay bypass, 1 additional output
Connector BNC per IEC 61169-8 Annex A
Signal Level 800mV nominal
DC Offset 0V ±0.5V
Rise And Fall Time 200ps nominal (HD), 740ps nominal (SD)
Overshoot < 10% of amplitude
Return Loss > 15dB up to 1.5GB/s (HD), > 15dB up to 540MB/s
Wide Band Jitter < 0.2UI

Genlock Input

Type HD Tri-level Sync
NTSC or PAL Color Black 1V p-p, or
Composite bi-level sync (525i/59.94 or 625i/50) 300mV
Connector BNC per IEC 61169-8 Annex A
Termination 75Ω (jumper selectable)


Minimum Delay 65.5ms (1770 samples) for standard definition, 37.7ms (2800 samples) for high definition
Maximum Delay Approx. 16.5s for standard definition, approx. 3.2s for high definition


Voltage +12V DC
Power 20 watts
EMI/RFI Complies with FCC Part 15, Class A
EU EMC Directive


Number of Slots 2

Stand Alone Enclosure

Dimensions 14" L x 4.5" W x 1.9" H
(355mm L x 114mm W x 48mm H)
Weight Approx. 1.5lbs (0.7kg)

Ordering Information

7743DLY-HD HD/SD-SDI Video Delay

Ordering Options

Notes Rear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+SA Standalone Enclosure Rear Plate
+3RU 3RU rear plate for use with 350FR, 7700FR-C, 7800FR or 7801FR Multiframes


350FR Portable Multiframe which holds 7 single slot modules
7700FR-C 3RU Multiframe which holds 15 single slot modules
7800FR 3RU Multiframe which holds 15 single slot modules
7801FR 1RU Multiframe which holds up to 4 single slot or 2 dual slot modules
S7701FR 7700 Series Standalone Enclosure


7800FC VistaLINK® Frame Controller
CP-2116E-H System Control Panel, One Touchscreen LCD and 16 LCD Buttons
CP-2232E System Control Panel, 2RU, Two Touchscreen LCDs and 32 LCD Buttons