Audio Developments AD144 - Manual (Page 5)

4
Module fix screws - Hexagon head screws are used to fix the modules and back
cover. The size being 1.5mm HEX A/F with a 2.5M thread.
If it becomes necessary to remove modules or back cover it is strongly advised using
a good quality hexagonal head driver.
Use of a screwdriver, however desperate, is not recommended.
Microphone powering - the mixer will remain unconditionally stable if the powering on
unterminated input channels is switched off - this also improves the noise
performance and crosstalk. Powering - phantom (or 12v tonader) - may be selected
before or after the microphone is connected to the module.
Surfaces - every working surface is covered by a hard plastic membrane which is
printed on the reverse side. These surfaces may be cleaned by most solvents, and
without fear of the legends being erased.
Connectors - for convenience, the connector panel is labelled for reading from above.
All connectors are in line with their corresponding module.
Every input module is mechanically shielded against radio-frequency interference.
In order to facilitate the testing and calibration of all modules, a set of two extender
modules is available from the factory.
ABBREVIATIONS
PPM peak programme meter
VU
volume unit
VR variable resistor
X-Y coincident stereo-microphone
A-B spaced-apart stereo-microphone
M-S middle-side; techniques and microphone described by A D Blumlein
PCB printed circuit board
HPF high-pass filter
Finally, may we draw your attention to our range of portable, battery-operated
audio-toys called PORT-A-FLEX (AD066) which will complement your new mixer.
No 1 - broadcast quality compressor/limiter. Nos 3, 7, 8, 10 - distribution amplifiers
for microphone- and line-level signals. No 13 - the aforementioned FLEX-EQ in its
portable guise.
We wish you many trouble-free hours of use from your mixer. As a company, we are
fully committed to BS EN ISO 9001. Should you have any problems or require any
further information on FLEX-EQ or the M-S microphone technique, please do not
hesitate to contact us on 01922 457007 or by fax on 01922 457008 or by e-mail
[email protected].