Grass Valley Adder II - Manual (Page 31)

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Adder II
User Guide
• set the PORTS to w (powered)
• set the TERM to ON
• center each of the INPUT gain, OUTPUT gain and NULL controls
Readjust these controls to optimize performance as required.
Diamondback
The Adder II is compatible with earlier Diamondback multiplexers. The Coax ports are used
and the Adder II must be set for 75 Mbps mode when paired with bi-directional
DiamondBack II’s or DiamondBack 4x4’s. When used with a Diamondback, the Adder II is
limited to 32 channels in each direction.
Setting 75 Mbps operation
Fig. 2-29: The Base Unit PCB and 75/125 Mbs Switch
Figure 2-29 shows the Base Unit PCB. Each module is attached to its appropriate cable
header on this board. In addition, all optical and coaxial I/O, data functions and power
are handled here.
Figure 2-29 also shows the 75/125Mb switch that has a bearing on
overall system functionality.
The large switch (in the yellow circle) toggles between two different system data transport
rates.
• In 75Mb/sec mode, the system is Diamondback II compatible, but is capable of only 32
bi-directional channels plus Intercom and data.
• In 125Mb/sec mode, the system is no longer Diamondback II compatible, but can
accommodate up to 64 channels, bi-directional, plus data, and intercom.
The Base Unit PCB 75/125 Mbs Switch