User manual

SCPUHF Paging Transmitter System
SCPUHF Issue 2
5
d) Mode Setting
There are 3 modes available. These are set on switches 7 and 8 on the 8-way bank (SW2).
The following modes are available:
Switches 7 8 FUNCTION
Mode 1 OFF OFF 1 PAGER NUMBER, INDICATING 4 INDIVIDUAL ZONES
Mode 2 ON OFF 4 PAGER NUMBERS, INDICATING 1 INDIVIDUAL ZONE
Mode 3 OFF ON 2 PAGER NUMBERS, INDICATING 2 INDIVIDUAL ZONES
1) This will display [1] on Zone 1, [2] on Zone 2, [3] on Zone 3 and [4] on Zone 4*
2) This will provide each of four pagers with [X] one zone each, when their respective input is
triggered.
3) This will provide pager 1 with the display [1] on Zone 1 and display [2] on Zone 2. It will
provide pager 2 with the display [3] on Zone 3 and the display [4] on Zone 4*.
*Note: Zone 4 is + or – 12V dc trigger
Section 2: Installation
The information contained in this Section is intended for use by authorised system
installation engineers only. Unqualified personnel should not undertake installation of
this equipment under any circumstances whatsoever.
Siting of the hardware
Before locating the hardware in any given location, it is important to take into account the
range of operation that you require to obtain from your system. The standard transmitter can
quite easily provide ranges of up to a mile or more and will provide excellent propagation on
most industrial sites, covering a considerable area with just a quarter wave antenna (BNC
terminated) connected directly to the unit.
For coverage of very large sites, or where exceptionally difficult operating conditions exist, it
may be advantageous to install an external antenna. Installing the transmitter on the second
or third floor of a building will more often than not boost overall range. However, horizontal
range is not always required as much as propagation through a multi-storey building. Here it
may be more useful to use a small external antenna mounted outside the building at half the
building height. Sometimes range is required more in one direction than in the other: moving
the aerial to one side of the building can provide a bias in the required direction, which may
overcome the range difficulties. (See section: Other Antennas).
Important: coaxial feeds which are longer than 5 metres must employ low loss 50 ohm
coax. We normally do not recommend feeds of more than 15 metres for standard
applications. However, we suggest you contact our technical department where other
considerations may prove this to be impractical.
A further consideration that must be taken into account is the length and location of the dry
contact cables. To avoid interference and possible false triggering, cable runs should be kept
to a minimum
(ideally less than 10 metres) and should be isolated from other cabling (e.g.
mains, telecoms. PC networks, etc).