User manual

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Horus User Manual
IOM-HORUS DA8/DA8P
The
DA8
(up to 192kHz) and the
DA8P
(up to DSD) have consistently shown in testing to be the
quietest multichannel D/A conversion modules available anywhere.
IOM-HORUS-DA8/DA8P Key Features
• Auto-mute circuitry for “no-pop” power cycling
• Digitally controlled trims for line up procedures
• Dynamic range of 127dB (typ.)
• Easy to set dip switches for international operating levels
IOM-HORUS-DA8/DA8P Specifications
Max Line Output @ 0 dBFS (jumpers on +24 dBu) +24 dBu +0/-0.5 dB
Frequency response +0/-0.3dB @ fs = 48000 Hz 6 Hz – 20 kHz
Frequency response +0/-0.3dB @ fs = 2.8224 MHz (DSD) NA / 6 Hz – 20 kHz
Frequency response +0/-3.0dB @ fs = 2.8224 MHz (DSD) NA / 2 Hz – 50 kHz
Line Output Impedance (Differential) 100 Ω
Dynamic Range (A-weighted, typ) 126 dB
THD+N D/A (1 kHz) @ 0 dBFS (IOM-HORUS-DA8) < -113dB (0.00022 %)
THD+N D/A (1 kHz) @ 0 dBFS (IOM-HORUS-DA8P) < -115dB (0.00018 %)
Interchannel Crosstalk @ 1kHz, typ. -135 dB
Connector Pinout DB-25 (Tascam Ana.)
Line Output Level calibration
The DA8 and DA8P modules feature both a hardware level settings in the form a 4 DIP switches per
output channel and a software fine adjustment to align the Analog Output levels to whatever
local/organization operational levels are mandating.
The Hardware settings are usually to be set only once, at product installation, and only if the desired
Operating Line Level defers from the default ex-factory settings of +18 dBu for 0 dBFS.
Procedure for Hardware alignment:
1. Shut down your Horus and make sure that the Horus back panel Power is also switched OFF.
2. Unscrew all DA8 modules that need adjustment.
3. Pull gently out (5-7 cm is enough) to access the DIP Switches there is one block of 4 dip switches
per channel. Channel 1 is labeled S1, channel 8 is labeled S8.