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Compressor CharacteristicsPolar Response Capsule Frequency Response
Graphs
Architect’s and Engineer’s Specication
The paging microphone shall be capable of paging up to 16 zones
either individually, in user-denable groups, or all zones simultaneously.
The microphone shall be available in versions with 4, 8, 12 or 16 zone
paging buttons. It shall be possible to interconnect up to 32 similar
paging microphones with full operational transparency, via standard
CAT-5 cabling.
The microphone shall become active when a non-latching ‘TALK’
button is pressed. Zone selection shall be by electronically latching
buttons, with selection conrmed by LEDs. A non-latching ‘CALL ALL’
button shall also be provided, selecting paging to all supported zones.
Four ‘GROUP’ buttons shall also be provided, and it will be possible
for the user to dene a group of zones for each. A ‘CLEAR’ button
will be provided to cancel incorrect zone selections. There shall be
a legend area adjacent to each button for user’s zone identication.
The microphone itself shall be mounted on a gooseneck and
be non-removable. Two lengths of gooseneck shall be available.
The microphone level shall be adjustable by an internal control
of the preset type.
The paging microphone will interface directly to compatible mixers
or other host devices via a digital interface carrying audio, zone
selection and power on a single CAT-5 cable. It will also be equipped
with an analogue interface consisting of an audio output and a
separate short-to-ground control port, permitting its use with any
other host devices equipped with this type of access. The analogue
zone selection interface shall be able to sense when any paralleled
system is active.
The microphone will be capable of being powered via either type of
interface, or from a local external PSU. The unit will operate from
both DC (12-24 V) and AC (9-17 V) supplies.
It shall be possible to set various conguration options which
will not be resettable by the user and which will be reinstated
after a power interruption: i) setting zone selection to either
remain in place post-announcement, or to self-cancel; ii) offsetting
zone numbering, allowing a microphone to address a different
(consecutively-numbered) set of zones; iii) locking group denitions
so they cannot be altered by the operator; iv) assigning two levels of
priority, whereby ‘high’ priority will take precedence when messages
conict when multiple microphones are in use; v) enabling one of
four pre-set internally-generated pre-announcement chimes to be
selected and setting the chime level; vi) disabling the selection of one
or more zones.
The paging microphone shall be built in a compact housing
with a non-slip base for desktop use; the unit shall also be
suitable for wallmounting.
The paging microphone shall be the Cloud PM Series; Model PM4
(4 zones), PM8 (8 zones), PM12 (12 zones) or PM16 (16 zones).
Polar Response Capsule Frequency Response Compressor Characteristics
Issue_2.0 E&OE
(16 stránky)
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