Grass valley 8937D DATASHEET

8937D Dual SDI/ASI Reclocking Equalizing Distribution Amplifier 29

Key Features

•Two separate distribution amplifiers on a single card

•One with a looping differential input with three active outputs in addition to the loop-through passive output

•One with a single-ended terminating input with four active outputs

•Suitable for SMPTE 310M, SMPTE 259M, DVB ASI, SDI 270 Mb/s and most other 800 mV data from 4 Mb/s to 360 Mb/s

•Input presence detection for each channel with SNMP trap generation

•Independent reclocking circuits for each channel to reduce jitter

•Automatic input cable equalization for up to 300 meters for each channel

•Card edge LED status indicators

This distribution amplifier is ideal for spaceconstrained applications where a limited number of signal copies are required. By offering twice the density, it’s a perfect solution for mobile production applications—enabling 20 channels of distribution in only 2 RU of rack space. Both channels are fully DVB ASI compatible and can be used in any application where standard SDI video or ASI signals are to be copied and distributed. The standard reclocker circuits greatly reduces jitter-induced over cable runs adjacent to high power lines or from unstable sources of standard data rate signals. The reclocker can easily be disabled to pass SMPTE 310M and other nonstandard data rate signals. A user-enabled video

presence detection feature generates individual SNMP traps for each channel that can be sent to our NetCentral SNMP manager or other SNMP systems.

8900V-R

J1	J2
Output 2	Output 2
J3	J4
J5	J6
Input 2
	Output 1
J7	J8
Output 1

J9	J10	Output 1
Input 1
		(passive)
Loopthru

	ASI or	EQ
	SDI In 2

Video

Input

Presence

Detection

Reclocker

Bypass

Switch ASI or

SDI Out 2

	ASI or	EQ
	SDI In 1
	SDI Out 1
	(passive)	Video
		Input
		Presence
		Detection

Reclocker

Bypass

Switch ASI or

SDI Out 1

	Local	Microprocessor	LEDs
	Control

Ethernet Control

via frame bus

Specifications

Supported Frame Types

GeckoFlex with 8900V-R GeckoFlex Video rear module, Gecko video frames: 8900TX-V, 8900TF-V, 8900TFN-V

Power Rating

3.5 Watts – single slot

Inputs

Type: 800 mV ±10% serial digital data including SMPTE 259M

Connector type: BNC

Impedance: High Z differential loop-through and 75Ω terminating

Supported data rates: 4 Mb/s through 360 Mb/s Reclocked data rates: 143, 177, 270, 360 Mb/s Return loss: >15 dB (up to 360 MHz)

Auto equalization: Up to 300 meters (270 Mb/s)

Output

Type: 800 mV serial digital data in phase with the input signal

Number of outputs:

•Four outputs, three active plus one passive loopthrough

•Four outputs, four active signals

Connector type: BNC Impedance: 75Ω

Return loss: >15 dB (up to 360 MHz)

Performance

Electrical Length: <20 ns

Temperature Range: 0° – 45°C

Local Indicators/Controls

LED indicators:

•Signal presence

•Input sample rate

User controls:

•Bypass/auto jumper selection for reclocker

•Local/local-remote control enable jumper

Remote: SNMP trap generation – input presence detection

Ordering Information

This module can be mounted in a GeckoFlex frame when ordered with the 8900V-R GeckoFlex Video rear module.

8937D

Dual SDI/ASI reclocking equalizing distribution amplifier

For detailed specifications, installation, and setup instructions see: www.grassvalley.com/docs/modular