ConneXions II V7 MAC Mains, Multi Port Version
CONV7MAC 05/98
Issue 1
3
System Overview
The Scope ConneXions II is a POCSAG data display radio paging system which can be used to transmit
both text and numeric messages direct to pocket pagers carried by individuals or entire groups.
Information is input by way of three RS232 serial ports. The unit can also be used in conjunction with an
optional telephone interface, thereby enabling any telephone within the building or complex of buildings to
access the paging system. Up to 9,999 pagers can be supported on any one system.
Note ! This system requires a valid Radiocommunications Agency licence for operation in the UK. It is the
user’s responsibility to apply for an On-Site Paging licence on form RA5 for any of the frequencies listed
below*. Where equipment has been supplied on 461.300 MHz, the user must apply for an SRBR (Short
Range Business Radio) Licence on form RA 283.
The relevant clauses on the RA5 form (Section C) should be completed as follows:
8. Base Equipment make and model:
Connexions II CONX7MAC
10. Transmitter Type Approval No.
13249 CONX7AC
11. Transmitting Frequency:
459.225 MHz or 459.275 MHz, 459.050 MHz or 459.100 MHz*
12. Effective Radiated Power:
0.5W
*please refer to delivery note for chosen frequency
Section 1: 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 over 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 is the distance between the transmitter and the source of the data feeding the
transmitter. With a standard RS232 serial interface, data cables should not exceed
15 metres
. These
cables should be screened/shielded and must be kept clear of sources of induced magnetic or electrical
noise. In the event that distances of over 15 metres are required, additional drivers or amplifiers must be
installed at both ends of the data link.
