Videotek® VSG-4MTG

Master Timing Generator

The Videotek® VSG-4MTG is part of the Imagine Communications

Reference Sync and Timing platform, and is a ½RU wide, 1RU tall and 12 inches deep 3G/HD/SD master timing generator. The unit is small in size, with redundant power supply inputs, and is low in power consumption and light in weight, making it a perfect fit for all broadcast television and post production environments.

Features

Genlocks to standard color black (black burst) meeting NTSC SMPTE ST 170M and PAL ITU R BT. 4705 specifications

Genlock to tri level sync meeting SMPTE ST 240M/274M/296M specifications

Support for various time code formats and time code user bit formats, including SMPTE/EBU drop frame or non drop frame time code formats

GPS support via 10 MHz, PPS and RS-232 interfaces

NTP and PTP (IEEE-1588) support via a network connection

VITC support from color black reference input and on color black outputs

LTC, D-VITC and ATC support

GPI inputs and outputs

Redundant external power supply

Optional auxiliary input and output breakout

Two LTC outputs

Support for DARS or word clock

Processing Features

Configurable DST and leap second changes

Auto detection for input sources

User-definable scheduled call outs to time reference sources, such as GPS receivers

User-programmable delays for input and output, offsets, time code offsets, output phasing, and input and output jam syncs

Display of current local time and date

Details

An internal timing engine processes the incoming reference information, makes appropriate conversions to different time bases and maintains a consistent time base, which is used to drive the unit's outputs. Using a combination of parameters such as leap second information, DST (Daylight Savings Time) rules, and offset values, the VSG4-MTG can be configured to convert incoming International

Atomic Time (TAI) to other time bases. This time is then distributed to the module's outputs as time and date information, color black video reference signals and DARS (Digital Audio Reference Signal) or word clock.

The optional GPS-3904 is recommended for use with the VSG-4MTG, as it not only provides GPS locked time and date, but also provides a highly stable master temperature controlled oscillator source for the for the video, audio and time code reference outputs.

The VSG-4MTG has multiple timing inputs that include GPS (Global Positioning System) sourced time and date with 10 MHz, PPS (Pulse Per

Second) and serial data time and date inputs, LTC (Linear Time Code), NTP (Network Time Protocol), VITC (Vertical Interval Time Code), D-

VITC (Digital Vertical Interval Time Code), ATC (Ancillary Time Code) support and support for IEEE-1588 PTP (Precision Time Protocol).

The video reference input supports NTSC, PAL, SD, HD and 3G formats for video source sync signals including color black (black burst) or tri level sync.

The VSG-4MTG has 5 outputs that can user-selected for color black or tri level sync with individual offsets and formats. This provides for multiple format timing from a single reference source. The VSG-4MTG also provides outputs that include NTP master, PTP master, VITC, and LTC outputs with individual offsets on all outputs, as well as DARS (digital audio reference signal) or word clock output.

The easy-to-use front panel and web user interface allow for instantaneous status on any source or output including date, time and lock information.

The VSG-4MTG provides for daylight savings time and time zone offsets, with an auto changeover function for source failures with primary and secondary source selection for maintaining the uninterruptable status that is required by the most stringent systems.

The unit has dual power supply capabilities and includes two external 110/220 universal AC adapters providing the required DC power input.

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Specifications

Specifications and designs are subject to change without notice

VSG-4MTG MASTER

TIMING GENERATOR

Standalone

(no GPS option)

GPS-3903-2

GPS-3904

STABILITY

OVER TIME

4PPM

(0.34s/day)

Not

Applicable

Not

Applicable

PPS (PULSE PER

SECOND) ACCURACY

4PPM (0.34s/day)

10 MHZ

ACCURACY

Not Applicable

1 PPS (static) ±50 nanoseconds

UTC 15 nanoseconds

(one sigma)

APPLICATIONS

Not Applicable

1.16 x 10

-12

(one day average)

Time will vary ~2 minutes per year, see below for recommendations

Recommended for date/time-of-day and time code only reference

Recommended for date and time-of-day and video/audio/time code reference

GENLOCK INPUT

Input Connector Type BNC female, passive looping

Input Impedance

Blackburst Input Amplitude (External reference)

Hi-Z

NTSC: Sync and burst 286 mV nominal

PAL: Sync and burst 300 mV nominal

Blackburst Input Amplitude Tolerance ±6 dB

Black Burst Subcarrier Jitter

Tri-level Sync Amplitude

Tri-level Sync Amplitude Tolerance

Return Loss

<1 ns (pk-pk) over one horizontal line

600 mV pk-pk nominal

±3 dB

<-40 dB

10 MHZ INPUT

Input Connector type

Input Impedance

Level

PPS INPUT

Input Connector Type

Input Impedance

Level

Edge Transition

Return Loss

LTC INPUT

Input connector Type

Nominal Input Amplitude

Minimum Input Amplitude

Maximum Input Amplitude

DIFFERENTIAL BALANCED

Format

Impedance

Input Sensitivity

BNC connector

75 ohms

2 V pk-pk ±3 dB

BNC connector

75 ohms

TTL; Vih=2.0 V min, Vil=0.8V max

20 ns max

<45 dB to 20 MHz

3 pin Weidmuller or BNC (Differential balanced or unbalanced)

2 volts pk-pk

0.5 volts pk-pk

4.5 volts pk-pk

SMPTE/EBU LTC 24/25/30 drop/non-drop auto-sensing

Hi-Z (>30 k ohms) or 600 ohms, selectable with switches

500 mV pk-pk

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UNBALANCED

Format

Impedance

Input sensitivity

LTC OUTPUT

Electrical

Format

Impedance

Level

Level

Transition Time

Electrical

Format

Impedance

Level

Transition Time

Display

Communication Interfaces

SMPTE/EBU LTC 24/25/30 drop/non-drop auto-sensing

Hi-Z (>30k ohms)

500 mV pk-pk

SYNC OUTPUTS

Output Connector Type

Blackburst Signal Level

Blackburst Subcarrier Jitter

SC/H Phase

Tri-Level Signal Level

DC Offset

Reference to Output Timing

5 BNC

NTSC: sync and burst 286 mV, nominal

PAL: sync and burst 300 mV, nominal

<1 ns (pk-pk) over one horizontal line

0° ±10°

600 mV pk-pk

0 V ±0.5 V

±100 ns

DAR/WORD CLOCK OUTPUT (SHARED DARS/WORD CLOCK)

Audio Formats

Output Connector Type

Output Impedance

DARS Output Level

Jitter

Output Sample Rate

Word Clock Output Level

AES/EBU

BNC

75 ohms nominal

1 V pk-pk

≤ 0.25 UI

48 kHz

5 V TTL level

Differential balanced

SMPTE/EBU LTC 24/25/30 (frame per seconds) drop/non-drop support

Low-Z (<25 ohms per side)

3.9 V pk-pk nominal into 1 k ohms (Low-Z output)

2.5 V pk-pk nominal into 1 k ohms (600 ohms output)

40 µs + 4 µs measured at 10% and 90% amplitude

Unbalanced

SMPTE/EBU LTC 24/25/30 (frame per seconds) drop/non-drop support

Low-Z (<25 ohms per side) or 600 ohms, selectable with switches on optional break-out board

2 V pk-pk nominal into 1 k ohms

40 µs ±4 µs measured at 10% and 90% amplitude

256×64 OLED display for device configuration

1 Ethernet port RJ-45 10/100 Base-T (web browser control, PTP and NTP interfaces)

GPIO connector 26 female pin D-sub

Nominal Input Amplitude 2 volts pk-pk

Minimum Input Amplitude 0.5 volts pk-pk

Maximum Input Amplitude 4.5 volts pk-pk

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POWER

Power connector barrel type with screw lock

Power Input 12 VDC ±1.2 VDC

Power Consumption

Non-resetting Fuse

AC Adapter Included

<20 W nominal

2.5 A, 16 VDC

MECHANICAL

Mechanical (H x W x D)

Weight

1.74 x 8.46 x 13.21 in. (4.42 x 21.49 x 33.32 cm)

3.05 lbs (1.38 kg)

ENVIRONMENTAL

Operating Temperature

Storage Temperature

Humidity (non-condensing)

Non-operating

Altitude Operating

Ordering Information

VSG-4SYS-M

VSG-4MTG

32° to 122° F (0° to 50° C)

-22° to 149° F (-30° to 65° C)

Operating: 20% to 80%

5% to 90%

6562 ft (2000 m)

VSG-4MTG system, includes 2 VSG-4MTG master timing generator, 1 VSX-11-3G multiformat sync changeover Unit, 1 DRT-5 and 1 RMT-U1 rack mount trays, and 2 VSG-4-BRK-1 breakout panel

Master Timing Generator supporting NTP, LTC, VITC, D-VITC, ATC, five reference outputs,

IEEE-1588 PTP capability, includes two PSU-12-1 power adaptors for redundancy, optional

GPS-3904 antenna and receiver, DRT-5 dual rack mount tray and BLK-5 blank filler panel

OPTIONS

VSG-4-BRK-1

DRT-5

BLK-5

PSU-12-1

RMT-U1

Breakout panel and 5 ft cable with HD26 pin DSUB male to female connectors for the VSG-4xxx series and DL-870

Dual rack mount tray for VSG-4 series and DL-870, BLK-5 blank front filler available (DRT-ADP-

1 DRT adaptor required for installing DRT-4 products in the DRT-5 rack tray (CMN-41, CMN-

MV, LLM-1770, VSG-401))

Blank panel for left or right side of DRT-4A or DRT-5

Spare or replacement power supply for Videotek VSG-4xxx and Selenio DL-870, 12 VDC output with threaded coupling ring, input 90 to 264 VAC

Rack mount tray holds up to 8 VSG-4 series power supplies or a combination of items

OPTIONAL GPS ANTENNA AND RECEIVER

GPS-3904

GPS-3902-RM

GPS antenna and receiver kit, 110-240 VAC operation, serial data, 10 MHz and PPS outputs, includes AC power supply, RG-59 antenna cable (23m/75ft), for use with VSG-4MTG, VSG-

4CSD and VSG-4TSG for time/date and video/audio timecode applications

Rack mount kit, holds up to two GPS-3903-2, GPS-3904 receivers

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Images/Diagrams

Back Panel

Block Diagram

The optional VSG4BRK1 breakout adaptor provides GPS PPS, RS232, LTC and GPI inputs and output connections

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