Metric Halo 2882 operating guide - Manual (Page 41)

Mobile I/O User’s Guide
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put level to be consistent with the needs of other audio gear. The
output impedance is approximately 50 Ohms.
This format is appropriate for interfacing with prosumer and con-
sumer audio equipment.
3. Gain Trim knob
• The Gain Trim knob allows you to adjust the analog gain of the output
stage (post DAC) over a 40dB range determined by the output standard
that you have selected. The gain is indicated in dB relative to the nominal
level of the output standard you have selected. The gain changes are
smoother near the bottom of the scale, with the steps increasing in size as
you reach the +40dB gain limit. Unless the signal is quite low, you will put
the output stage into analog clipping well before you hit the 40dB gain
limit.
4. Channel Label button
• This simply labels which channel is associated with the output.
5. Channel Level Meter
• This is a peak reading, high-resolution fast PPM meter. It shows the pre
converter level of the output signal of the associated channel. The peak
hold bar indicates the highest level seen on the channel since the last
reset. You can reset the hold by clicking on the meter. These meters are
simply high resolution versions of the meters shown on the front panel of
the box – all the meter data is generated by the Mobile I/O hardware.
A NALOG O UTPUT C HANNEL L INK
In addition to the channel specific controls, each channel pair shares a Link
button. When the Link button is engaged, changes made to one channel of
the pair will automatically be applied to the other channel of the pair. This is
very useful if you are driving a stereo monitor section or stereo device. By
engaging the Link button, you will ensure that both channels have precisely
the same amount of analog gain applied post DAC. When you enable the
Link button, the control values for the odd channel in the pair will be copied
to the even channel of the pair.
D IGITAL O UTPUT M ETERS
To the right of the Analog Output controls is the Digital Meters section. This
group of meters provides level metering for all of the digital outputs on the
Mobile I/O. These meters have the same response characteristics as the ana-
log output meters, and show you the audio activity on ADAT output chan-