Oxmoor PIR-88M - Manual (Page 3)

• Eight audio inputs
• Eight internal RF modulators
• Switchable between 95 kHz and 250 kHz
• Front Panel LED Frequency indicators
• Eight RF outputs through BNC jacks
• PA-422 serial control capability
• Removable terminal blocks for easy wiring
Oxmoor Corporation, LLC’s eight-channel Infrared Matrix
system simplify the integration of infrared assistive listen-
ing and room combining systems. By routing appropriate
IR modulators and emitter panels to coincide with room
combining changes, eliminate intermodulation interfer-
ence without the need for complicated physical patching.
The PIR-88M Infrared Modulator Matrix ™ packs eight
electronically balanced audio inputs and eight RF modula-
tors 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 dis-
play of the selected frequency.
The system easily interfaces with Oxmoor’s MCS ™ Room
Combining System through PA-422 ports. Connected to
the MCS-Mainframe, the PIR-88M configures IR assistive
listening systems, automatically tracking room combining
changes selected at the MCS master controller. IM interfer-
ence 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 control-
ler. Up to eleven presets can be user programmed, each
providing a different patching assignment between the
eight output connections.
A 37-pin, standard D-sub connector provides the connec-
tions for external preset switches. This Control Port facili-
tates an external switch for programming the presets and
"tally" indicator activation (open-collector closures to com-
mon) for routing and program switches. DC power is also
present at the Control Port for tally LEDs.
The PIR-88M accepts eight balanced or unbalanced audio
inputs. The eight modulated outputs are through BNC
jacks that 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.
PIR-88M INTRODUCTION
Page 1