PM4/8/12/16 & PM4/8-SA Installation and User Guide v1.1
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Note that once a chime is assigned to a group, it is not possible to check which chime
it is, as pressing a GROUP button will illuminate the zone and message LEDs, but
gives no indication corresponding to the chime.
Note also that if a chime number is assigned for which no chime file exists, the group
will operate normally, though there may be a slight delay before a message starts.
Setup options
The PM has a number of setup options which can be configured during installation.
These modify the operation of the unit in various ways, allowing the PM to be
optimised for the particular installation. Most of these options are set by moving
internal PCB jumpers. See “PCB layout diagrams” on page 49 for a PCB layout
diagram identifying the location of all the jumpers. See ”Accessing the internal PCB”
on page 20 for instructions on how to gain access to the internal PCBs.
NOTE
: Jumper settings are only checked by the PM’s processor on power-up.
In order for jumper changes to be recognised, power to the PM will need to be
disconnected and then reconnected.
When removing jumpers it is recommended that the link remains connected to one
leg of the header, to prevent losing it.
Mic Level
Mic volume may be adjusted with the preset control PR2 on the main PCB. See “PCB
layout diagrams” on page 49 for the location of this control. It is recommended
that, if possible, the operator who will normally make announcements from the PM
makes test calls to assess the system volume when adjusting mic level. Note that the
microphone will be ‘off’ if PR2 is turned fully anticlockwise.
Zone Offsets
By default, a zone button on a PM selects paging (and messaging on SA models) to the
same-numbered zone. Thus the buttons on a PM4 (or PM4-SA) will normally address
Zones 1 to 4, and those on a PM8 (or PM8-SA) Zones 1 to 8. However, there may be
situations where a PM is required to address a different subset of available zones to
the set starting at Zone 1.
It is possible to “shift” the zones a microphone addresses by any value between 1 and
15 by setting a numerical offset. With an offset applied, the zone a button addresses
will be that button’s ‘default’ zone number PLUS the offset value. Example: the four
buttons on a PM4 (or PM4-SA) can be made to address Zones 10 to 13 by applying
an offset of 9.
