Merging Hapi MKII, User Manual

Page: 67 / 112

www.merging.com/hapi Page 67
HAPI MKII User Manual
and DSD mode. In DSD mode it is possible to set a gain of up to +6dB on a
full-scale signal to benefit from the SACD headroom.
48V
This button will turn on 48V phantom power for the channel. If it is lit, it means
that Phantom power is active. Only active on channels set to Mic.
The total current drawn on the phantom power by all the microphones should
never exceed 48mA for the whole device
If a MAJOR (by MAJOR, we mean that the threshold of short-circuit detection
requires at least 10 Preamp inputs to be shorted simultaneously) 48V Phantom
Power Supply short circuit is detected, 48V is forced off on all A/D channels
and the following error message is displayed.
“48V power failure: all A/D 48V forced off until next reboot”
This warning applies ONLY to the initial RUN 3 production batch of AD8 and AD8P and has been
fixed for all modules shipped starting November 2012:
The 48V power MUST be turned off prior to changing the connection in certain patch bays. Many
such patch bays do short the Hot, Cold or both signals to Ground during insertion or removal of the
Jacks with the risk of deteriorating permanently the protective resistors in the input of the PreAmp
circuitry. If an AD module input circuitry is damaged, following such a short, it will end up
permanently having inaccurate gain levels, distortion or even no signal at all on some channels.
That would require hardware replacements at your own cost, since such damage is not covered by
our warranty.
If you still own one of the original and unmodified RUN 3 AD8/AD8P modules we recommend that
you contact your Merging reseller to organize an update of your module(s), which Merging is
pleased to provide free of charge.
Zlo
– Zhi
Mic input impedance (only available for ADA8, AD8D/AD8DP run 9 and above)
and AKD8D/AKD8DP modules.
For the different mic input impedance values, please refer to the card
specifications.
PAD (P - B)
A -10 dB Pad can be applied in the Mic Preamp circuitry.
B- Boost: Increases the mic input signal level by 12 dB > Max input level 0dBu
Note: The Boost is only available for the modules ADA8S and ADA8P
Recommended for Ribbon Microphones that have low output.
Ø
Polarity invert button. When lit, it inverts the polarity of the selected input
signal.
80 Hz (Hz)
Low cut filter 80 Hz. Second order, 12 dB/octave.
Meters dB scaling
The Meters scaling is displaying from -90 dBFS to 0 dBFS.
Meters color range
Refer to the Meters Page Settings, in order to adjust the Level meter color
range (Peak, Alignment and Decay time).
Rst
Stands for Reset Peaks Hold Meters. The top Red led of the PreAmp metering
will indicate that a Peak has occurred. In order to clear the Peak display, simply
press the RST button on the remote web access. To reset the peaks on the
OLED you must refresh the PreAmps Page by going to previous one and back.
Enabled the Peak Hold option under the Meters menu Settings
Navigation
Use the left << and right >> arrows in order to navigate through the banks of 8
inputs. Will be active if more than one AD8(P) module is present in the unit.