MultiDyne HD-3500 Series - Manual (Page 4)

Instruction Manual, HD-3500 Series INTRODUCTION 1
REV F, April 1, 2015
INTRODUCTION
The HD3500 Series of stand-alone SMPTE 3G video High Definition Serial Digital
Interface (HD-SDI) with audio and data transport systems extends the range limits of
electrical interfaces, and combines audio and data along with the HD-SDI signal in a single
optical fiber link. The system will transport digital signals from 5 Mbps up to 2.970 Gbps,
analog audio, AES digital audio, serial data, intercom, tally, and General Purpose I/O (GPIO)
signals.
Applications include transmission links for high definition or digital television, studio to
transmitter; studio-to-studio, robotic studio cameras, studio to CATV head-end and backhaul
feeds from special events. The transmitter and receiver units are available in portable or
stand-alone and modular configurations ideal for both field and studio applications.
FEATURES and OPERATION
The HD3500 supports all popular standards for digital video transport such as SMPTE
259M-C, SMPTE 292M, and SMPTE 424, working at 270 Mbps, 1.495 Gbps, and 2.970
Gbps respectively. In addition, the HD-SDI interface also will transport signals compatible
with DVB/ASI, and SMPTE 297M interfaces at the defined rates. The units include a digital
reclocked DA and repeater for the SMPTE SDI standards mentioned above. For other
standards and rates, the signal is automatically or manually passed thru without reclocking.
For the SDI/HD-SDI input, the units include automatic cable equalization based on the data
rate detected.
Separate from the SMPTE video transport, the HD-3500 also transports 4 analog
audio channels with maximum configurable levels of 4dBu, 10dBu, 16dBu, or 28 dBu; 2
digital AES pairs up to 96Khz that cross convert with the 4 analog channels; and a
bidirectional stereo channel for intercom applications with maximum level of 4dBu. The
system also supports 4 GPIO bidirectional channels with open collector inputs capability and
relay contact for the outputs; 1 bidirectional tally IO with open collector input and contact
relay output; and 3 bidirectional serial data channels compatible with RS232 or RS422
transport up to 3Mbps.
To accomplish SMPTE video with bidirectional audio and data transport, 3
wavelengths are multiplexed over a single fiber using a CWDM module, a 1310nm optic used
for SMPTE video, and 1490nm and 1550nm optics are used for the bidirectional audio and
data transport. The SMPTE video input and output use standard BNC connectors while the
audio and data use a DB44 connector with either a special breakout cable assembly or a
diving board. See appendix A for pin-out information.