Connections
Balanced Analog | Auxiliary Digital Output, | Clock Reference Input, |
Line Inputs (XLR) | BNC (AES) | BNC (AES, Wordclock, Superclock) |
Left | Right | | Aux 24 or 16-Bit | AES/EBU | AES, |
| | | Digital Output | | WC, |
| | | | | SC |
| | | | | Ref In |
| | SPDIF, | ADAT/SPDI F | | |
| | AES | | WC |
| | | |
| | | | | Out |
Analog Line In | | Main 24-Bit Digital Outputs | | |
Main Digital Output, | Main Digital Output, | Main Digital Output, | Wordclock Reference |
BNC (SPDIF/AES) | TOSLINK Optical (ADAT /SPDIF) | XLR (AES /EBU) | Output, BNC |
Balanced Analog Line Inputs
Left and Right balanced inputs use locking Neutrik™ gold-pin female XLR jacks. These inputs have a wide operating range. The input sensitivity (at 0 dBFS) ranges from -20 dBu (at maximum gain) to +29 dBu (at minimum gain). The input impedance is 200k Ohms balanced, and 100k Ohms unbalanced. The high input impedance and input sensitivity, allow direct connections from many instrument pickups (adapter cable required). Direct connection of piezo pickups is not recommended as these pickups require higher input impedances (to prevent low-frequency roll-off problems).
•XLR pin 2 = + Audio In
•XLR pin 3 = - Audio In
•XLR pin 1 = Cable Shield (grounded directly to the chassis to prevent internal ground loops)
2.Connect ground (sleeve on ¼” phone plug, case on RCA plug) to XLR pins 3 and 1.
Note it is best to used balanced wiring (“+”, “-“, “shield”) and to tie the “-“and “shield” at the unbalanced connector.
Clock Reference Input
This input auto-detects AES/EBU, SPDIF, Word Clock, or Super Clock signals, and automatically follows changes in sample-rate. When Auto mode is active the ADC1 will lock to the external clock source. Benchmark’s UltraLock circuitry isolates the conversion clock from any jitter present on the clock reference. Auto Mode will not degrade the conversion quality of the ADC1 even when very high levels of jitter are present on the clock reference.
To adapt to unbalanced sources
1.Connect “+” or hot (tip on ¼ phone plug, center pin on RCA plug) to XLR pin 2.
ADC1 Instruction Manual | Page 7 |
