Benchmark DAC1 - Revision History

Benchmark Media Systems, Inc.
Page 2 of 39
Revision History:
Revision Filename Date PCB Rev. Author
A DAC1 – Manual – Rev A. Doc 10/01/02 A John Siau, Allen Burdick
B DAC1 – Manual – Rev B. Doc 11/27/02 A John Siau
C DAC1 – Manual – Rev C. Doc 05/08/03 C John Siau
D DAC1 – Manual – Rev D. Doc 07/11/03 C John Siau
E DAC1 – Manual – Rev E. Doc 08/04/03 C John Siau
F DAC1 – Manual – Rev F. Doc 03/01/04 C Allen Burdick
G DAC1 – Manual – Rev G. Doc 06/03/04 C Allen Burdick
H DAC1 – Manual – Rev H. Doc 11/22/04 F John Siau
I DAC1 – Manual – Rev I. Doc 01/13/06 F, G John Siau
J DAC1 – Manual – Rev J. Doc 03/08/06 F, G John Siau
K DAC1 – Manual – Rev K. Doc 05/16/06 F, G John Siau
L DAC1 – Manual – Rev L. Doc 01/31/07 F, G Allen Burdick, John Siau
M DAC1 – Manual – Rev L. Doc 01/10/09 F, G Elias Gwinn
N DAC1 – Manual – Rev L. Doc 10/26/09 F, G Elias Gwinn
Manual Revision Notes:
Revision Note
I Added 176.4 and 192kHz phase and latency specifications.
J Updated PCB revision notes for PCB revision G.
K Corrections on page 17 – factory default
L RoHS notes and Warranty update, Corrections on page 9 – 192 kHz Optical Input
M Clarification to calibration ‘Caution’ statement
N Updated output levels in variable mode
PCB Revision Notes:
PCB Rev. Note
C Added internal 10, 20, and 30 dB pads with jumpers for XLR outputs.
F Changed unbalanced output impedance to 30Ω
ΩΩ
Ω, upgraded optical input for 192kHz
capability, reduced DC offsets, added balance trim pot.
G Minor change to BUF634 mounting pads. No circuit or performance changes.