ConneXions II V7 MAC US Multi Port, Mains, USA Version
CONV7MACUS 02/00
Issue
2
5
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.
Base Equipment type & description:
Connexions II Multi Port, Mains Paging Transmitter with
10 Dry Contacts
Transmitter FCC ID:
JRNUSASERILINK
Transmitting
Frequency:
457.575 or
457.550 MHz*
Effective
Range:
Up to 1 mile with standard antenna
!
*or as specified on separate configuration sheet
!
optional external aerials and amplifiers available for greater range
Section 1: Installation
The information contained in this Section is intended for use by authorized system installation
engineers only. Unqualified personnel should not undertake installation of this equipment under any
circumstances whatsoever.
Sitting 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.
