SCOPE COMMUNICATIONS UK LTD SCPUHF Four Zone POCSAG Paging Transmitter User Manual Scope Communications UK Ltd Quantum House, Totnes, Devon TQ9 5AL England. Tel: 01803 860700 Email: sales@scope-uk.
SCPUHF Paging Transmitter System PREFACE Important Installation Information It is the purchasers’ responsibility to determine the suitability of this equipment and its derivatives for any given application, Scope cannot give specific advice in this manual, as each use will require independent evaluation. Scope has, wherever possible, employed extra safeguards to monitor the system’s performance.
SCPUHF Paging Transmitter System Preface Important Safety Information Removal of covers from the equipment must only be undertaken by authorised service personnel, who must ensure that power is isolated prior to removal. Installation Installation must only be undertaken by an Approved contractor, who shall ensure that all work is carried out in compliance with IEE Wiring Regulations.
SCPUHF Paging Transmitter System System Overview The SCPUHF is a simple flexible UHF POCSAG radio paging transmitter designed to interface with almost any control equipment. It has four “change of state” input zones, three of which are dry contact and one which has either a 12V or 0V trigger input. It is normally supplied with one numeric radio pager, which is matched to the system serial number and base transmitter identity code.
SCPUHF Paging Transmitter System d) Mode Setting There are 3 modes available. These are set on switches 7 and 8 on the 8-way bank (SW2).
SCPUHF Paging Transmitter System Some major points to consider when installing equipment: 1 Never install antennas near or adjacent to telephone, public address or data communication lines or overhead power cables. 2 Avoid, where ever possible, running antenna coax alongside other cables. 3 Avoid mounting the transmitter in the immediate vicinity of telephone exchanges or computer equipment. 4 Always use 50 ohm coaxial cable between the antenna and the transmitter.
SCPUHF Paging Transmitter System 3 The transmitter should be fixed to an even wall surface using suitable screws fitted through the three holes provided in the chassis plate. Hold the chassis up to the chosen location and with the aid of a pencil mark the position of the mounting holes. Warning: Do not use the chassis plate as a template for drilling the holes into the wall. Hammer drills vibrating through the chassis may irreparably damage the quartz crystals on the printed circuit boards.
SCPUHF Paging Transmitter System Installation The Transcoder PCB contains static sensitive components. Care should be taken to avoid contact wherever possible and anti-static precautions should be observed during installation.
SCPUHF Paging Transmitter System Diagram 2: PSCPETX Case Top Panel View Case Securing Screws (slacken to remove cover) Case Bottom Panel View SCPUHF Issue 2 9
SCPUHF Paging Transmitter System Section 3: Operation The controller is in the sleep mode for most of the time, and will wake up every 1.2 seconds to read the inputs. If the RESET input is closed, the inputs are effectively disarmed and no pages will be sent, regardless of the input states. If the RESET input is open, the zone inputs will be compared to the states they were in when the board was powered up, or the last time the RESET input was closed.
SCPUHF Paging Transmitter System 5 Check that the power source is the correct type (12 to 14V dc) and correctly wired to the terminals provided (see diagram 3). 6 Check that the green LED lights for the duration of the transmission. If not, go back to the cabling and re-check the terminal connections. 7 Check that the aerial is correctly installed.
SCPUHF Paging Transmitter System Diagram 3: Transcoder PCB terminal connections SCPUHF Issue 2 12
SCPUHF Paging Transmitter System Other Antennas The range and performance of this equipment can be improved by the addition of more efficient antennas*. These can be installed either inside or outside the building and are connected to the transmitter with 50 OHM coaxial cable. Glass mount antenna (UHFGM): for installation on the inside of a suitable window. This can boost range, especially if it is required in one direction from the building.
SCPUHF Paging Transmitter System System Specification System Operating Voltage: 12 to 14V dc System Power Consumption: less than 250uA (microAmp) standby, 300mA transmit. Transmitter: Power output: 500mW Frequency band: 459 MHz Channel Spacing: 25 KHz Adjacent Channel: better than 200nW @ 4.5 KHz deviation TX Baud Rate: 512 baud Type Approval: EN 300 224 Type Approval No.
