Daktronics SPORTSOUND 2000HD, Руководство по установке

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Troubleshooting
24
Input/Output Expander
The fiber box features an input/output expander that converts the analog audio signal
from the control rack into a digital audio signal that can be sent over a local network.
Looking at the connections and LED indicators on these devices help with system
troubleshooting.
Figure 29: Network Activity & Analog Input
Typical Component Settings
Use the rotary dial and LCD screen to verify the following settings:
• Bundle # TX = 00001
• Bundle # RX = 00000 (default)
• CobraNet Latency = 5.33ms (default)
• Input Gain CH1 = +12 dBu
• Input Gain CH2 = 0 dBu (default)
• Phantom Power = OFF (default)
• Output Gain CH1 & CH2 = 0 dBu (default)
• Password Protect = UNLOCK (default) –
If accidently password locked: power down,
hold in rotary dial button, power on, wait for screen to display Audia, let go of button;
this resets the settings to factory defaults
• Title Display = AUDIA EXPI/O 2 (default)
Verifying Network Activity
Look at the bottom left corner of the Ethernet port for LED identification ( Figure 29-1 ).
• Consistent flashing about 6 times a second = Device has a CobraNet connection to
amplifiers. This is proper working state.
• Intermittent flashing about 1 time per second, or solid green light = Connected to a
switch, but no CobraNet connection to amplifiers. There must be a connection to
continue troubleshooting!
• No lights = Not connected to a switch.
Checking for Input Signal
Caution! Ensure sound cabinet is OFF during this test or damage to drivers will occur!
Output a 1 kHz sine wave between 0.5 VAC–1 VAC from the mixer (go to http://dakfiles.
daktronics.com/downloads/Audio/CD Test Tones/1kHz Sine Wave.wav ). Measure the AC
Voltage with a digital multi-meter placed between the positive and negative terminals
of the male XLR connector. If the level is above or below the listed range, adjust it using
the mixer’s channel and master faders. Next, measure the AC Voltage at the input of the
terminal block between the positive and negative terminals ( Figure 29-2 ). If it reads the
same, the device is getting proper signal; if it reads different, there is a wiring issue.