Fan speed control and monitor, On-board regulator – Grass Valley 8900NET v.4.4.0 User Manual
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8900NET (Net Card) — Instruction Manual
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Functional Description
Fan Speed Control and Monitor
The fan speed circuit controls the speed of the fans based upon the ambient
temperature in the area in which the frame is located. If the temperature is
30° C or lower, the fans are set to minimum speed. For temperatures above
30° C, the fan speed is set higher as the temperature increases. The fan
speed is set to maximum for ambient temperatures above 40° C.
The fans are set for maximum speed at the factory to accommodate HD
modules and other higher power modules such as the 8995UDX which
require a dual rear slot in the GeckoFlex frame. This setting is made on the
8900NET module switch S1 segment 7 (refer to
On-board Regulator
+12 V supply voltage is regulated on-board to provide +5 V and +3.3 V to
the module