Crown Audio IQ-PIP-USP2_CN - Manual (Page 20)

IQ-PIP-USP2/CN
Page 20 IQ-PIP-USP2/CN Reference Manual
* This is assumed to be 70V or the rated
8-ohm output for Com-Tech amplifiers
or the rated 8-ohm output voltage for all
other amplifiers.
** Thermal Headroom on your Crown am-
plifier may be labeled Output Device
Emulation Protection (
ODEP ® ).
***See the amplifier’s Reference or
Owner’s Manual for more information
about ODEP and how it works.
5 Amplifier Control and
Monitoring
This section describes the
IQ-PIP-USP2/CN amplifier control
and monitoring features. These fea-
tures are accessed via IQ for Win-
dows software. Please refer to the
IQ for Windows documentation if
you are unfamiliar with IQ software.
5.1 IOC Event Monitor
The Input/Output Comparator
(
IOC ® ) of each channel of the ampli-
fier can be monitored by the IQ
System. The IOC circuitry acts as a
sensitive distortion meter to provide
you proof of distortion-free perfor-
mance. If distortion of any kind
equals or exceeds 0.05%, the IOC
circuit will cause an IOC Event Moni-
tor on the front of the amplifier to
flash. The IQ-PIP-USP2/CN can
cause a warning to flash on your
computer screen via IQ for Win-
dows software indicating an IOC
event, Also, it can report IOC events
to its AUX port.
5.2 Input Signal Level
Monitor
The input signal level of each chan-
nel can be monitored. This monitor
feature has a range from +20 dBu to
–40 dBu in ½-dB steps.
5.3 Output Signal Level
Monitor
The output signal level of each chan-
nel of the amplifier can be moni-
tored. This monitor feature has a
range from 0 dB to –40 dB where
0 dB is referenced to the rated out-
put voltage of the amplifier model.*
The IQ-PIP-USP2/CN features
scaled output level meters. By fac-
tory default, the meters are cali-
brated such that 0 dB equals the
amplifier’s rated output into 4 or 8
ohms. If the IQ-PIP-USP2/CN is in-
stalled into a
Com-Tech ® amplifier,
the meters default to 0 dB equals 70
Vrms. Changing the 4/8 - 70V mode
software switch selects the respec-
tive scaling.
5.4 Thermal Headroom
Level Monitor
The Thermal Headroom level** of
each channel of the amplifier can be
monitored by the IQ software. This
level represents the percent of avail-
able power/thermal capacity that is
currently being used within the out-
put section of the amplifier. When
the thermal headroom level reaches
100%, the amplifier cannot produce
any more power and it will begin to
limit the drive level to the output
devices to protect them from too
much stress*** The Thermal Limiter
feature of the IQ-PIP-USP2/CN can
be set to engage upon a pre-se-
lected thermal level. (See Section
5.9.)