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NXC-VOL4 Volume Control Card
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NetLinx Cardframe, Control Cards, and NetModules - Operation Reference Guide
NXC-VOL4 Volume Control Card
The NXC-VOL4 Volume Control Card (FG2024) provides four discrete volume control channels with LED feedback.
The volume control channels can be programmed for mono or stereo operation, and balanced or unbalanced audio
connections. It supports programmable audio levels, audio mute, variable ramp speeds and preset levels.
Use the on-board jumpers to set the gain/attenuation (Unity, Pro level (+4dBu) to Consumer level (-10dBu) conversion,
or Consumer level to Pro level on each channel). FIG. 8 shows the VOL4 card.
Specifications
FIG. 8 NXC-VOL4 Volume Control card
NXC-VOL4 Specifications
Power Requirements 197 mA @ 12 VDC
Volume 1-4 Four volume channels
Status 1-4
(3 LEDs per channel)
• Yellow LED shows level-up/down activity
• Red LED shows mute mode
LED 1: Channel 1 RAISE (yellow)
LED 2: Channel 1 LOWER (yellow)
LED 3: Channel 1 MUTE (red)
LED 4: Channel 2 RAISE (yellow)
LED 5: Channel 2 LOWER (yellow)
LED 6: Channel 2 MUTE (red)
LED 7: Channel 3 RAISE (yellow)
LED 8: Channel 3 LOWER (yellow)
LED 9: Channel 3 MUTE (red)
LED 10: Channel 4 RAISE (yellow)
LED 11: Channel 4 LOWER (yellow)
LED 12: Channel 4 MUTE (red)
Gain jumpers 1-4 • Unity - Maximum Input Level: +10dBm
• Pro level to Consumer level conversion (attenuation of +4dBu IN to -10dBu OUT)
Maximum Input Level: +10dBm
• Consumer level to Pro level conversion (gain of -10dBu IN to +4dBu OUT)
Maximum Input Level: +6dBm
Connections/wiring Two 10-pin 3.5 mm captive-screw terminals
Audio Specifications • Frequency response of 15 Hz - 25 KHz·
• THD less than .005% at nominal output level·
• S/N ratio greater than 100 dB (IHF A)·
• Crosstalk less than 80 dB·
• Logarithmic attenuation range of 95 dB
I/O Jumpers (CH1-CH4)