Owner manual

Page 20
Reference Manual
P.I.P.-RPA
Pots other than 10 K ohm will work
best if you change the scaling resis-
tors to match the pot value. For ex-
ample, use a 20 K resistor for a 20 K
pot. Do not exceed 50 K. The scaling
resistor locations are shown in Fig-
ure A.1. Resistor R65 is used for
Input A, R74 for Input B, R79 for Input
C, and R89 for Input D.
Remove the
front panel (4 screws)
from the top and bottom circuit boards
to access the scaling resistors. With
the panel removed, separate the cir-
cuit boards by pulling them straight
apart. Take care not to bend the long
connector pins which connect the
two boards. For more help, contact
Crown’s Technical Support Group at
800-294-6939.
A.2 Master Remote Control
If desired, the attenuation of more
than one input can be controlled with
just one master remote control pot. In
fact, all of them can be controlled
from one pot. One input will be the
master and all others grouped with it
will be slaves. The procedure is
simple:
1. Select which input you want to use
as the master input. Connect the
remote control pot to it. (Input A is
the master in Figure A.2.)
2. Remove the appropriate scaling
resisters from all but the master
input. (Figure A.1.)
3. Jumper the master remote pot to
all the slave remote control inputs.
To control the level of Inputs A and C
with the pot for Input A, remove the
Input C scaling resistor (R79) and
add a jumper between the A and C
remote inputs as shown in Figure
A.2.
A.3 Limiting Remote
Attentuation
Depending upon the installation, it
may be desirable to limit the maxi-
mum remote attenuation. For ex-
ample, you may want to decrease
the sensitivity of the remote control
pot so it must be rotated farther for a
given amount of attenuation. You may
also want to prevent someone from
turning a microphone down too low.
Figure A.3 shows a simple way to do
this by placing a resistor in parallel
with the 10 K remote control pot.
Fig. A.2 Master/Slave
Remote Control Wiring
Fig. A.3 Adding an Attenuation Limit
Resistor Parallel to the Remote Pot