2882 Users Guide
163
Using the 2882 Hardware
2882 Front Panel
Figure 8.3: 2882 Front Panel
The 2882 front panel provides ten-segment metering for the 8 analog inputs and outputs. The meters are
fast VU meters with auto-resetting peak holds.
The front panel also provides 2882 system status at a glance:
• Sample Rate (nominal 44.1, 48, 88.2, 96, 176.2 or 192kHz)
• The Sample Rate is determined from the currently selected clock source so it will accurately indi-
cate the current sample rate, even when the clock source is being provided by an external device.
• 176.4kHz sample rate is indicated when both 44.1 and 48 are lit.
192kHz sample rate is indicated when both 88.2 and 96 are lit.
Note: A/D conversion is not available at 4x sample rates. Interestingly, the D/A converters operate
fine at 4x rates, even though they are 96kHz-specified chips.
• Clock source:
• Internal - indicates that the system is internally clocked
• Wordclock - indicates that system is being clocked from the wordclock input
• Digital In - indicates that the system is being clocked from the selected digital input (Optical, AES
or S/PDIF)
• Power — Indicates that the 2882 is receiving power.
• Phantom power — Indicates that at least one of the preamps has the phantom power enabled.
• FireWire — Indicates that the 2882 has been successfully connected to either a USB or MHLink
Gigabit Ethernet connection to the Host computer.
• Locked — Indicates that the system clock recovery circuit is properly locked to the selected clock
source. If this light is not illuminated, the 2882 will not be locked to a clock and will revert to its
failsafe internal clock source. Even if the Locked light is not illuminated, the actual sample rate will
still be indicated on the front panel display.
• Digital I/O Section:
• The AES and S/PDIF lights indicate when a valid incoming digital audio stream is present. The
Locked light indicates when the digital receiver is locked to the incoming digital audio signal.
The Mobile I/O front panel also provides access to the Headphone output and some associated controls.
The headphone output jack is a TRS 1/4” jack that provides the Left Channel on the tip, the Right Channel
on the ring and the ground return for the two channels on the sleeve. These signals are all ground referred,
so they may also be split and fed single-ended (unbalanced) to an external audio device.
The 2882 headphone output is suited to a wide range of impedances. Headphones with lower impedance
would be expected to get louder than those with higher impedance.
