Belden Grass Valley NV8900, Руководство пользователя

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NV8900
Analog Audio to MADI Interface
This is a front view of the analog-audio-to-MADI interface:
This is a rear view of the analog-audio-to-MADI interface:
Function
The AA-to-MADI interface receives 64 analog audio inputs and produces two MADI outputs,
both identical. The second output is for redundancy.
The 64 inputs are paired internally and are represented by 32 LEDs at the front of the panel,
one for each pair. Each of these LEDs acts as a primitive level meter for the pair, according to
the following scale:
LED state Audio Level Range
Off < –50 dBfs
Green –50 to -4 dBfs
Red > –4 dBfs to 0 dBfs
The unit accepts video reference. It derives its internal clocks from the video reference. It
can free-run, but it is advisable to use an external reference, especially when used with an
NV8500 hybrid router.
Other LEDs
Each MADI output is represented by an LED at the front of the unit. The LED is green when
the MADI output is good. Otherwise, the LED is off.
The reference signal is represented by an LED. This LED is green when the reference is good
and red when it is not.
An alarm LED is off under normal operation but turns red for the following conditions:
• Overtemperature
• MADI output failure
• Reference is bad or missing
Alarm LED
Ref. LED
Rotary Switch
Channel LEDs
Power Supply LEDs
MADI LEDs
Video Reference
(Loop-Through)
Ethernet
Serial
Analog Audio Inputs (DB25)
Fan
MADI Output (2)
DIP Switches
Power (2)