C10 HD Installation Manual Section 5: System Administration | Page 5-41
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The ?>697 menu within the Maintenance pages holds a number of items that form key elements of the C10
HD configuration.
Its submenus are !5E5<B, %$, +(5CD@ and %1>?A=1C
!
+!(
This pop-up allows the global calibration of analogue line I/O cards fitted to a RIO I/O rack:
These settings do not affect to digital, MADI or Alpha-Link I/O units.
You may either choose one of the national (C1>41A4 options, or you may select the *B5A569>54!9>5!5E5<B
option and enter your own !9>5*@!5E5< (eg. test reference in dBu) and 514A??= (in dB).
If you choose a national standard, its values will be displayed automatically, all you must do is press the '53?>697DA5
(HBC5= box which appears at the bottom of the pop-up – when completed, this box changes to show (HBC5=
?>697DA54, as above.
Regardless of the choice of line level, you may extend the analogue headroom in your SSL microphone preamplifiers by
entering a positive value in the box next to the legend . This acronym stands for Extended Input Headroom, and uses
a differential gain stage to increase the analogue headroom in the mic amp with minimal impact on its sonic performance.
It achieves this by applying the specified EIH value to the digital input trim of any channel accepting a mic source, while
reducing the analogue gain of the mic amps by the same value. So, if an EIH of 10dB was set and a mic gain was set to
50dB, then 40dB would be applied in the mic amp and 10dB at the top of the channel strip.
The EIH digital gain is transparent, as you will still see the channel input trim pot at 12 o’clock and reading 0dB, plus due
to the low-noise design of the mic amp, 10 dB of EIH will not deteriorate the performance of the mic for gains above
25dB, and only slightly so for gains less than that.
Alpha-Link Live units are only available in two fixed operating levels: +18 and +24dBu. The system should be set to
match the appropriate Alpha-Link standard so that tone and mic gains are displayed correctly.
Config Menu
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