4
2.2
Back Panel Connections
External Clock. The External Clock button allows you to select an external source as
the word clock master. Pressing the button once will select the BNC input as the word
clock source and the button will illuminate blue. Press it again to select the ADAT 1 input.
The button will illuminate red to indicate ADAT as the word clock source.
Power User Tip:
When in either mode, the DigiMax DP88 will recognize to which sample
rate the external clock master is set and automatically switch to accommodate it.
Power Button and Sync light. The lighted ring around the power button of your DigiMax DP88 is
a clock source / sync indicator. It lets you know if you unit is receiving word clock correctly.
•
Blue. When this light is blue, your DigiMax DP88 is correctly
synced via Word clock, ADAT, or its internal clock.
•
Flashing Red and Blue. When this light flashes between blue and red, your DigiMax DP88
is not syncing properly to its chosen word clock. Check your cables and connections.
Power User Tip:
Word clock is the timing signal with which digital devices sync frame
rates. Proper word clock sync prevents digital devices from having pops, clicks, and
distortion in the audio signal due to mismatched digital audio transmission.
2.2
Back Panel Connections
Microphone Inputs. Your DigiMax DP88 is equipped with 8 digitally
controlled PreSonus XMAX
™
microphone preamplifiers for use with all types of
microphones. The XMAX design provides a Class A input buffer, followed by a
dual-servo gain stage. This arrangement results in ultra-low noise and wide
gain control, allowing you to boost signals without increasing background
noise.
Both DB25 and individual XLR connections are provided for these inputs. Engaging the DB25
input will bypass the corresponding XLR input. In this way, you can hardwire your DigiMax
DP88 into your patch bay using the DB25 connection and then bypass the XLR connection as
needed.
Direct-to-Converter Line Inputs. This DB25 connector is for use with line-level devices. These
inputs are scaled to accept line-level signals up to +18 dBFS.
Power User Tip:
When these inputs are engaged, the microphone preamp circuit is
bypassed completely and no trim control is available. Typical examples of line-level
connections are synthesizer outputs, signal processors, and stand-alone mic preamps and
channel strips. Use the output level control on your line level device to adjust its level.
Direct Analog Outputs. These are the balanced, direct analog outputs for the eight
microphone preamps on your DigiMax DP88. These outputs are post-gain, and pre-A/D
converter.
DAC Outputs. These balanced outputs carry the digital-to-analog converter signal from the
ADAT input(s) and converts the ADAT optical input signal to an analog signal.
Power User Tip:
Use these outputs in conjunction with ADAT input(s) to expand the analog outputs of your audio
interface for monitor mixing or speaker switching. By wiring the ADAT output to the ADAT input, you can also use
the DAC and Direct Analog Outputs to create an analog split of your eight input channels. See Section 2.3.3.
