RME Audio ADI-8 DS, User Manual

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User’s Guide ADI-8 DS
© RME
9. Analog Inputs / Outputs
9.1 Line In
The ADI-8 DS rear has 8 balanced Line inputs, provided by 1/4"
TRS and a 25-pin D-sub connector. Both are internally connected,
so can not be used at the same time. The electronic input stage is
built in a servo balanced design which handles unbalanced (mono
jacks) and balanced (XLR, stereo jacks) signals correctly, auto-
matically adjusting the level reference.
When using unbalanced cables with XLR or TRS connectors be
sure to connect pin 3 (- or ring) to 1 (ground). Otherwise noise may
occur, caused by the unconnected negative input of the balanced
input.
The 25-pin D-sub connector follows the pinout known from devices
manufactured by Tascam (pinout see chapter 12.5). Your local
dealer will supply analog breakout multicores D-sub to XLR in Tas-
cam pinout in different lengths.
The ADI-8 DS uses a completely symmetrical signal path that guarantees an exceptional sound
quality, outstanding low distortion and highest Signal to Noise ratio in all level settings.
One of the main issues when working with an AD-converter is to maintain the full dynamic
range within the best operating level. Therefore the ADI-8 DS internally uses hi-quality elec-
tronic switches, which introduce no additional noise or distortion to the audio path. A/D
REFERENCE allows for a perfect adaptation of all 8 channels to the most often used studio
levels.
Each analog input has its own level meter, so every channel can be checked for input signal
and overloads easily. The red LED OVR lights up 2 dB before full scale level (-2 dBFS) with half
brightness, and full brightness at 0 dBFS.
The ADI-8 DS uses the following level references:
Reference 0 dBFS @ Headroom @ +4 dBu Other RME devices
+24 +24 dBu 20 dB -
+19 +19 dBu 15 dB LoGain
+13 +13 dBu 9 dB +4 dBu
+4.2 +4.2 dBu 12 dB at -10 dBV -10 dBV
The s4.2 dBu equals -10 dBV with 12 to 15 dB headroom. Set to +24 dBu the ADI-8 DS
is compatible to SMPTE (+24 dBu @ 0 dBFS, +4 dBu with 20 dB of headroom).