Cloud Electronics PM12 - Manual (Page 20)

PM4/8/12/16 Installation and User Guide v2.2 20
Configuring the PM
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 page 32 for a PCB layout diagram identifying the location
of all the jumpers. See page 12 for instructions on how to gain access to the internal
PCBs.
NOTE: Jumper settings are only checked at 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 page
32 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 to the same-numbered zone. Thus
the buttons on a PM4 will normally address Zones 1 to 4, and those on a PM8 Zones
1 to 8. However, there may be situations where a paging station is required to address
a different subset of available zones to the set starting at Zone 1.
It is possible to offset the zones a microphone addresses by any value between 1 and
15. 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 can be made
to address Zones 10 to 13 by applying an offset of 9.
Zone offset applies only to the whole set of zone buttons on a PM, not to individual
zone buttons. Thus the zone buttons can only ever address a numerically-consecutive
subset of the available zones. If an offset is applied which makes one or more buttons
address a zone number higher than the system maximum of 16, the numbers “wrap-
around” back to 1. Thus applying an offset of 13 to a PM4 would result in its four
zone buttons selecting Zones 14, 15, 16 and 1 respectively. It should be evident from
this that zone offsets need not normally be set on a PM16, as all available zones are
individually selectable in any case. Setting an offset on a PM16 simply has the effect of
shifting the numbering of all the zone buttons.