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903-0623-00 Rev. A
Because of the high bandwidth of the HD-SDI signal, any external cabling and connectorization must
adhere to proper RF practices. For example, 75-ohm cabling and connectors should be used throughout
the entire link. Any connectors or cables with the wrong impedance, for example with straight wired pins
and/or no shielding, will cause reflections and signal degradation. Shielded coaxial cables and
connections are recommended throughout the wiring chain.
The LEDs on the 907-HDV board are not visible at the front panel once the card is mounted on the
907-EURO. For this purpose, a connector (J5) is provided for attaching external LEDs. The pinout details
and LED connections are described in Appendix A – Connector Part Numbers and Pin Assignments.
6.4.2 Configuration Settings
The HD-SDI card can be configured to support generic ECL and PECL (Positive Emitter Coupled Logic)
formats. The extra SMB connectors (J2 and J4) are used when the board is configured for differential
ECL inputs and outputs.
Switch SW1 sets the receiver equalization for the remote card (see Figure 6.4-2). For HD-SDI operation,
both SW1 switches (SW1A and SW1B) must be ON and SW2A switches must be OFF. Switch SW2 sets
the slew rate limit, which is generally enabled only for non-HD-SDI signals. For ECL and PECL operation,
both SW1 switches (SW1A and SW1B) must be OFF and SW2A must be ON.
Table 6.4-1 and Table 6.4-2 show SW1 and SW2 options respectively.
Equalizer Options
Enable receive equalizer SMPTE-292M/259M (default)
Bypass receive equalizer (not used)
Data Out/Slew Rate Min
Data Out/Slew Rate Max SMPTE-292M / 259M (default)
X = DON'T CARE
* Please contact Focal for more information about ECL and PECL operation of the HD-SDI card.
Focal Technologies Corp.
Table 6.4-1: SW1 Options
Table 6.4-2: SW2 Options
Slew Rate Mode
Model 903 User's Guide, FMB-X-2.5 Version
SW1A
SW1B
ON
ON
OFF
OFF
SW2A
SW2B
ON
X
OFF
X
Card Operation
HD-SDI
ECL and PECL*
Card Operation
ECL and PECL*
HD-SDI
Page 6-11
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