Crown Audio IQ P.I.P.-DSP - Manual (Page 20)

Page 20
IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
Reference Manual
4.21 Memory Backup
A memory backup feature is provided which can be
disabled, if desired. The factory default setting is
“enabled.” When enabled, it stores all run-time
parameters that can be controlled by the IQ software
into nonvolatile memory (EEPROM) at approximately
one second intervals. When disabled, all run-time
parameters are returned to the factory defaults
whenever the unit loses power.
CAUTION: Be careful to turn on the memory backup
feature if the input attenuators will be used to set critical
levels. If the memory backup feature is turned off and
the
IQ–P.I.P.–DSP loses power, the attenuators will be
reset to 0 dB, resulting in the loudest possible signal.
4.22 Amp Mode
The stereo/mono mode of the amplifier can be stored
into the unit’s memory so the
IQ System is aware of the
position of the amplifier’s stereo/mono switch. Storing
this setting serves as an “electronic reminder” to the
system—however, the stereo/mono mode cannot be
controlled with this setting. The modes are Stereo
(Dual), Bridge-Mono and Parallel-Mono. This software
amp mode setting is controlled by the
IQ System.
4.23 Amplifier Information
( PIP2 amplifiers only.) Several items of information
about an amplifier can be displayed by the IQ software.
These include the manufacturer, model, date code,
serial number and revision level. Which items are
available depends on both the amplifier and the IQ
software used.
4.24 IQ2 Protocol Support
The IQ–P.I.P.–DSP uses Crown’s IQ2 protocol. This
makes it possible for the user to design custom graphic
display modules to control and monitor the unit with
IQ2-compatible IQ software.
4.25 Crown Bus “Drop Out” Relays
“Drop out” relays are provided on the Crown Bus ports
to maintain the continuity of the IQ communication loop
even if the
IQ–P.I.P.–DSP loses power.
4.26 Data Signal Presence Indicator
A Data Signal Presence Indicator (DSPI) is provided
on the front panel. It flashes whenever commands
addressed to the
IQ–P.I.P.–DSP are received. It can be
forced to stay on by IQ software to assist with
troubleshooting of an
IQ System.
4.27 Reset
A recessed reset switch, accessible from outside the
P.I.P. panel (see Figure 2.1), enables the IQ–P.I.P.–DSP
to be restored to one of two sets of default settings. A
straightened paper clip or similar small object is
required to press the reset switch.
Press the reset switch for less than 2 seconds and all
settings, except the amplifier ID code or user scale
factors, will be reset with “user default” parameters and
the DSPI will flash once. This feature is only available if
“user default” settings have been previously
established. If none have, pressing the reset switch for
any length of time will cause the unit to be reset to the
“factory default” settings as described below.
Press the reset switch for more than 2 seconds and the
same settings will be reset with “factory default”
parameters and the DSPI will flash twice. After the unit
has been reset to the factory default settings, it will
behave like a standard
P.I.P.-FX until it is
reprogrammed by an IQ System or it is toggled to the
“user default” settings.
WARNING: Pressing the reset switch can cause the
IQ–P.I.P.–DSP to emit a brief pulse. We recommend
that the level controls of the amplifier be turned down
before pressing the reset switch.
4.28 User Default Settings
The parameters for all functions, except the amplifier
ID code or user scale factors, can be saved as “user
default” parameters. Then, pressing the reset switch
for less than 2 seconds will restore all settings to the
“user default” values. Please consult the documenta-
tion of your IQ software for instructions on setting the
“user default” values.