Crown Audio IQ-P.I.P.-MEM - Manual (Page 28)

Page 28 Reference Manual
IQ–P.I.P.-MEM Programmable Input Processor for IQ Systems
5 Technical Information
The purpose of the IQ–P.I.P.-MEM
is to enable an IQ System to control
and monitor a PIP-compatible
amplifier. The exact features of
your unit are determined by the
firmware in its microprocessor.
Here is a typical list of features:
❏ Control the audio signal level.
❏ Control the audio signal
polarity.
❏ Control the high-voltage
power supplies.
❏ Control the DSPI LED.
❏ Control and monitor the AUX
port.
In addition, all units can monitor
these parameters:
❏ Monitor the input level to the
IQ–P.I.P.-MEM.
❏ Monitor the output level from
the amplifier.
❏ Monitor the ODEP level.
❏ Monitor the IOC.
5.1 Audio Signals
Balanced and unbalanced audio
signals enter the module at the XLR
connectors. From these connec-
tors, the signals are RFI filtered and
fed into a balanced to single-ended
conversion stage. Additional gain
and/or phantom power for a micro-
phone are also provided in this
stage. From this point, the audio
signal is sent to a monitor input
(see section 5.2) and also to a digi-
Note: A Crown part number is pro-
vided in the given illustration for a
suitable solid-state relay (C 7308-
7). Contact your local Crown repre-
sentative or the Crown factory Parts
Department (219-294-8200) to or-
der.
By monitoring the operating condi-
tion of amplifiers with the IQ System
software, the need for additional
cooling will be apparent. The same
software could then be used to turn
on the appropriate AUX connector.
(For more information about turning
the auxiliary feature on/off, consult
the IQ software User’s Manual.)
In addition to the preceding ex-
amples, the AUX ports of more then
one IQ component can be used to
send binary codes to auxiliary
equipment. For example, eight AUX
ports can be used to send 8-bit bi-
nary codes to external equipment.
4.8.2 AUX Input
Depending on the IQ software be-
ing used, the AUX connector can
be used to sense the presence of
an input signal across pins 1
(ground) and 2 (+). A 2.5 to 15 VDC
signal at the input will be inter-
preted as a logic “high” and will be
communicated to the Crown Bus
where a host computer or drone
can act upon it. A signal less than
2.5 VDC is interpreted as a logic
“low.” Note: A negative signal can
also be used as a logic low be-
cause the signal is inter nally
clamped to protect the internal cir-
cuitry.