Specifications

5-6
B-Chain Alignment
EQ MIC INPUT
RIGHT SIGNAL PRESENT
LEFT SIGNAL PRESENT
SIGNATURE MIC
EQ MIC
NONSYNC2 RIGHT
NONSYNC2 LEFT
NONSYNC1 RIGHT
NONSYNC1 LEFT
CAT. NO. 681
Connect Cat. No. 580 Microphone
Multiplexer to the microphone input
connector on the rear panel, or if using
another type of multiplexer or single
microphone, open the front door of the
CP500 and plug it into the "EQ MIC
INPUT" connector on the Cat. No. 681
card. This is a balanced input connection
which is wired in parallel with the rear
panel connector. The rear panel
connector can also be used with a single
microphone if a suitable cable or adaptor
is provided.
The left signal presence LED indicator
on the top card edge should illuminate
indicating that signal is present.
If it is
not illuminated or is very dim, adjust
the "EQ Mic" control to obtain
sufficient signal.
NOTE
:
If your microphone requires phantom
power, move jumper J3 on the Cat. No. 681
board to the ON position.
O
F
F
8
0
7
0
6
0
5
0
4
0
3
0
OK
Pink noise will now be routed to the
center
channel output.
With a hand-held sound pressure level
meter, measure the noise level in the
room. Enter this reading in the box dis-
played by rotating the front panel knob,
then press the
OK
key.
The calibration is retained in CP500
memory and can be used in future ad-
justments, however it is advisable to
recalibrate the system when re-arranging
microphones because the sound pressure
level will vary slightly with microphone
placement.