Oxmoor PIR-88M User Manual
Oxmoor Corporation, LLC’s
eight-channel Infrared Matrix
system simplifies the integration
of infrared assistive listening
and room combining systems.
By routing appropriate IR modulators and emitter panels to coincide with room combining
changes, both models eliminate
intermodulation interference
without the need for complicated
physical patching.
The PIR-88M Infrared Modulator Matrix
™
packs eight electronically balanced audio inputs and
eight RF modulators into the
same compact 1U chassis. Each
of the PIR-88M's modulators is
limiter-protected and may be
switched to 95 kHz or 250 kHz
with front-panel LED display of
the selected frequency.
The system easily interfaces
with Oxmoor’s MCS™ Room
Combining System through PA422 ports. Connected to the MCSMainframe, the PIR-88M configures IR assistive listening systems, automatically tracking
room combining changes selected at the MCS master controller. IM interference between
emitter panels is prevented by
allowing only one modulator to
drive the selected group of emitter panels.
Integrating the Oxmoor Infrared Matrix Systems into other
combining systems is also
simple. Control can come from
either external “preset” switches
or a PA-422 controller. Up to
eleven presets can be user pro-
PIR-88M
INFRARED MATRIX
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CH. 5
CH. 6
CH. 7
CH. 8
PIR-88M Infrared Modulator Matrix
grammed, each providing a different patching assignment between the eight input and output connections.
A 37-pin standard D-sub connector provides the connections
for external preset switches. This
Control Port facilitates an external switch for programming the
presets and "tally" indicator activation (open-collector closures
to common) for routing and program switches. DC power is also
present at the Control Port for
tally LEDs.
The screw terminal blocks on
the PIR-88M accept balanced or
95 kHz 250 kHz
L I M
95 kHz 250 kHz
L I M
95 kHz 250 kHz
L I M
95 kHz 250 kHz
L I M
95 kHz 250 kHz
L I M
95 kHz 250 kHz
L I M
95 kHz 250 kHz
L I M
95 kHz 250 kHz
L I M
••••••••••••••••••••
•••••••••••••••••••
CONTROL PORT
™
SYSTEMS
12345678
PA-422
™
SW1
50 ohm
75 ohm
50 ohm
75 ohm
50 ohm
75 ohm
50 ohm
75 ohm
50 ohm
75 ohm
50 ohm
75 ohm
50 ohm
75 ohm
50 ohm
75 ohm
ON
CH.
•••••
••••
Out
M O D
M O D
M O D
M O D
M O D
M O D
M O D
M O D
SWITCHER
•••••
••••
Send/ReceiveOn Board Microcessor
In
unbalanced audio inputs. BNC
RF OUT jacks on both units
present the signal to be delivered to each emitter panel.
Other rear panel connectors include 9-pin, D-sub PA-422 input
and output ports, used to receive PA-422 data and pass it
along to the next PA-422 device,
and cage clamp terminal block
connections for the external ± 15
VDC powering module.
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CH. 2
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CH. 4
CH. 5
CH. 6
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CH. 8
Oxmoor Corporation, LLC, 309 Cahaba Valley Parkway, Birmingham, AL 35124 USA Toll Free: 1-800-262-6898
Phone: 205-982-8200 Fax: 205-982-8250 E-mail: info@oxmoor.com Internet: www.oxmoor.com
PIR-88M™ SPECIFICATIONS
AUDIO INPUTSAUDIO INPUTS
AUDIO INPUTS Type .............................................. Electronically Balanced (RF Suppressed)
AUDIO INPUTSAUDIO INPUTS
Connectors .................................... Screw Terminal Blocks with Mating Connector
Input Impedance ........................... 80 K Ohms
Input Sensitivity ............................. Nominal +4 dBu, Maximum +24 dBu
Trim Pot Range .............................. ±15 dB
MODULATORMODULATOR
MODULATOR Input ............................................. Limiter Protected
MODULATORMODULATOR
RF OUTPUTSRF OUTPUTS
RF OUTPUTS Connectors .................................... BNC
RF OUTPUTSRF OUTPUTS
CONTROL PORTCONTROL PORT
CONTROL PORT Connector ..................................... 37-pin D-sub, Female
CONTROL PORTCONTROL PORT
COMMUNICATIONCOMMUNICATION
COMMUNICATION Protocol ......................................... PA-422
COMMUNICATIONCOMMUNICATION
POWERPOWER
POWER Connector ..................................... Cage Clamp Terminal Blocks
POWERPOWER
MECHANICALMECHANICAL
MECHANICAL Overall Dimensions ........................ 44mm H x 482mm W x 183mm D
MECHANICALMECHANICAL
Frequency ..................................... 95 kHz or 250 kHz Selectable
Preemphasis ................................. 50 µ sec.
Peak Deviation ............................... ± 50 kHz
Crosstalk Attenuation ..................... 50 dB @ 250 kHz
Output Level .................................. 750 mV rms
Input Type ..................................... Active Low, Internally Pulled Up
Logic Action "Selectable" ............... Momentary or Maintained Closure to Common
Logic Levels ................................... Low < .8 Volts, High > 2.4 Volts
Maximum Sink Current .................. 1 mA
Maximum Cable Length ................. 600 m (2000 ft), #22 AWG
Switching Time .............................. 50 ms
Power Output ................................ +15 VDC ± 0.1 V, 50 mA
Input Connector ............................. 9-pin D-sub, Mail
Output Connector .......................... 9-pin D-sub, Female
AC Adapter Provided
Voltage .......................................... ±15 VDC
Current .......................................... 1 Amp
(1.72" H x 19" W x 10" D)
Finish ............................................ Textured Black Paint
Weight ........................................... Shipping: 3.8 Kg (8.5 lb.)
Net: 3.1 Kg (6.9 lb.)
Rev. 7/01
Specifications subject to change without notice.
Oxmoor Corporation, LLC, 309 Cahaba Valley Parkway, Birmingham, AL 35124 USA Toll Free: 1-800-262-6898
Phone: 205-982-8200 Fax: 205-982-8250 E-mail: info@oxmoor.com Internet: www.oxmoor.com
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