MultiDyne HD-3500 Series - Manual (Page 5)

Instruction Manual, HD-3500 Series FEATURES and OPERATION 2
REV F, April 1, 2015
TRANSMITTER, HD-3500-FTX
The transmitter module front and back is shown in figure 1. In the back and from left to
right it includes a DB44 connector for all audio and data IO; two serial digital video SMPTE
75 Ohm input BNC connectors, one for input and one for reclocked SDI / HD-SDI output loop;
a single fiber output ST or SC connector; and a DC Jack power connector. In the front of the
module we see 3 SMPTE SDI lock LEDs for 270 Mbps, 1.485 Gbps and 2.970 Gbps rates;
SMPTE SDI CD (Carrier Detect) LED; 2 audio status LED that indicate channel 1 and 2 level,
peak, or AES presence; 6 data activity LEDs to indicate TX and RX activity in the 3 data
channels; a tally on indicator LED; a link status LED; and a power LED.
SMPTE video transport
The HD-3500-TX receives SMPTE video or other properly encoded data signals from
5Mbps to 3Gbps. The SMPTE video signal is connected to the 75 ohms BNC input connector
in the back. Signals with rates from 19 Mbps to 3Gbps are then equalized. Equalization is
used to help open the digital video eye pattern that may have been closed or deteriorated
due to long coaxial cable runs. After equalization, the signal is reclocked and sent to the fiber
transport and to a 75-ohm loop output, which is the second BNC connector in the back. The
front rate LEDs indicate that a valid SMPTE rate is locked by the re-clocker PLL. The Carrier
Detect (CD) LED indicates that a signal has been applied to the input. Carrier Detect is
sensitive to digital carriers from 19Mbps to 3Gbps.
Non-SMPTE transport via the SMPTE interface
The HD3500 will operate normally by default with SMPTE video signals at the rates
indicated earlier; however, other signals may need special settings. The SMPTE video input
has a feature that automatically mutes signals as noise or other signals under 19Mbps. If you
need to transport these signals, the auto mute feature can be disabled changing the jumper
Figure 1. Front and Back of HD-3500-FTX