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IQ P.I.P.–SMT
6 Specifications
General
Internal Controls:
An 8-segment DIP
switch is used to set the IQ address
(decimal range: 1–250). Note: If ad-
dress “0” is selected, the
IQ–P.I.P.–
SMT
will operate in stand-alone mode.
Two additional 8-segment DIP
switches (one for each channel) set
the preamp gain of each input and
turn phantom power on and off. A Re-
set switch, accessible with a straight-
ened paper clip through the
P.I.P.
panel, resets all settings (except the
amplifier initialization data) to the
“user defaults” if it is pressed for less
than 2 seconds or the factory defaults
if it is pressed for more than 2 sec-
onds.
Connectors:
Crown Bus Input: Lock-
ing 5-pin female DIN connector.
Crown Bus Output: Locking 4-pin fe-
male DIN connector. Audio Input: Bal-
anced 3-pin female XLR connector for
each channel. AUX: A 3-pin male mini
connector.
Indicators:
A yellow DSPI (Data Sig-
nal Presence Indicator) flashes when
a valid IQ command is received from
the
IQ System
via the Crown Bus. De-
pending upon the firmware version in
your unit, the DSPI can be forced on
to facilitate rapid troubleshooting of
Crown Bus wiring.
Auxiliary Feature:
+15 VDC is sup-
plied across pins 1 (ground) and 3 (+)
of the AUX connector when turned on
by the
IQ System
software.
Power Requirements:
When in-
stalled into a Crown
P.I.P.
-compatible
amplifier, the unit receives ±24 VDC.
Crown Bus Data Communica-
tion
Protection:
If communication is lost,
the unit will continue to function with
the last commands received.
Data Rate:
38.4 K BAUD.
Data Format:
Serial, binary, asyn-
chronous; 1 start bit; 1 stop bit; 8 data
bits; no parity.
Crown Bus Interface Type:
Optically
isolated 20 milliamp serial loop.
Operation:
Half duplex.
Intelligence:
8-bit microprocessor
with 12 K byte control program.
Transmission Distance:
Variable
from 200 to 3000 feet (61 to 914 m),
depending upon wire capacitance.
Typically 1000 feet (305 M) using
shielded twisted-pair wire, #26 AWG
or larger. Can be extended with an IQ
Repeater.
Audio
Please note: The audio specifications
are referenced to 0.775 V (0 dBu).
Measurements were made at the out-
put of the
IQ–P.I.P.–SMT
module, it-
self.
Input Impedance:
Nominally 24 k
ohms balanced and 12 k ohms un-
balanced.
Phantom Power:
Nom15
VDC, 1.5 mA.
Microphone Preamp:
Adds +20 or
+40 dB of gain.
Maximum Input Level:
+12 dBu.
Signal-to-Noise Ratio:
>90 dB from
20 Hz to 20 kHz.
