User's Manual Part 3

ManualsBrandsRFI Americas ManualsElectronicsRFBE Module

DSPbR Series – User’s Manual

Document Number 00000.B Page 41/75

4.4 Lightning Protection

In order to proactively protect the DSPbR from static discharges, power surges or lightning strikes we

recommend the use of additional lightning protection products.

The AC Mains

Although the DSPbR complies with the basic mains surge protection requirement according to EN 61000-4-5, it

is recommended that in areas where the mains voltage is susceptible to voltage variations and surges, that

medium or coarse voltage conditioning and surge protection be installed.

RF Coaxial Cabling

All RF coaxial cabling exposed to proximity or direct lightning discharges should be well grounded prior to entry

into the DSPbR with suitable voltage differential protection between the outer and inner conductors.

Ethernet connection

As network cabling may also be susceptible to surges, the IP Ethernet connection should be provided sufficient

protection using a product such as the Polyphaser, NetGuard or NX Series products.

GPS and GPRS/3G Antenna; Suitable coaxial cable protection should also be afforded to the GPS and cellular

modem antenna cables prior to termination into the DSPbR.

4.5 Antenna Installation

As the DSPbR amplifies and rebroadcasts low levels of received RF, it is very important to ensure a sufficient

margin over minimal receiver to transmitter antenna isolation – typically +15dB greater than the highest (UL/DL)

programmed gain figure. Where frequency translation is not used and the same frequency received is

rebroadcast, the required isolation is greater.

Scenario 1; When installing antennas and the respective coaxial interconnect cables for a system that does not

use frequency or band translation, it is important to achieve a relatively high donor to extended coverage area

antenna isolation. The settable gain of the channel must remain within a safe margin below the donor to

extended range antenna isolation.

The higher the isolation between the two antennas, the higher the usable channel gain / output power into the

extended coverage area and visa versa without unwanted feedback.

Summary of content (20 pages)

PAGE 1
DSPbR Series – User’s Manual 4.4 Lightning Protection In order to proactively protect the DSPbR from static discharges, power surges or lightning strikes we recommend the use of additional lightning protection products.
PAGE 2
DSPbR Series – User’s Manual Scenario 2; where rebroadcast frequencies have a Tx to Rx offset, the following graph is illustrative of the minimum antenna isolation requirement. 100 ATTENUATION dB 95 90 85 80 75 70 0.1 1.0 FREQUENCY MHz 10 Figure 21 – DSPbR Antenna Isolation Chart Please note that this minimum isolation requirement will be applicable to the duplexer on shared uplink/downlink antenna systems. Document Number 00000.
PAGE 3
DSPbR Series – User’s Manual 4.6 External / Internal Alarm Interface At the rear of the chassis protruding from the back of the Ref Gen module is the DB15 female (socket) alarm interface connector. Figure 22 – Alarm Interface Circuit Diagram The alarm interface drawing details the respective alarm input and output circuits with the DB15 connector pins. The DSPbR caters for coupling into the unit and reporting up to four external alarm inputs.
PAGE 4
DSPbR Series – User’s Manual 5. Start – Up 5.1 Connectivity Ethernet – via RJ45 sockets, refer to Chapter 5.2 for connection details. RS232 – via serial DB9 connector. The serial interface allows either a local or remote terminal to configure the DSPbR and access alarm information. This is achieved through pre-configured factory accessible CLI (Command Line Interface) script. USB – via USB Type “B” socket.
PAGE 5
DSPbR Series – User’s Manual Should the web browser be unable to open this session, it may be necessary to set the IP address of your laptop / notebook to a nominated address such as 192.168.1.180. This is done for example in windows XP in the following manner; Step 1. Select “Start” from status menu 2. Single click – “Control Panel” 3. Double click – “ Network Connections” 4. Double click - “Local Area Connection” 5. In Local Area Connections Status box, single click the “Properties” tab. 6.
PAGE 6
DSPbR Series – User’s Manual 5.2.3 Log in Page Please note: If the incorrect username and password has been entered in succession more then three times, the interface to the repeater will be blocked for 5 minutes. Refer to chapter 5.2.2 IP Address - Reset to factory default Ethernet addressing for default user name and password. 5.2.4 GUI Tree The GUI has been structured into two user name and password access levels. Level 1 (lower): Display and provide access to the Introduction, Status and Logout pages.
PAGE 7
DSPbR Series – User’s Manual 5.2.5 Introduction The following Level 2 pages are screen images of the respective pages accessible via the web browser. These pages are for the most part self-explanatory with adjacently located help notes. Document Number 00000.
PAGE 8
DSPbR Series – User’s Manual 5.2.6 Status Pages Status\Current Hardware Status\Alarm Status Document Number 00000.
PAGE 9
DSPbR Series – User’s Manual Status\Alarm Status\Details Status\Version Register Document Number 00000.
PAGE 10
DSPbR Series – User’s Manual Status\Channel Status Overview Note: Frequency translation is shown in the above example screen. Frequency translation is not permitted under FCC Part 90 rules, and can only be programmed when the DSPbR is being operated in accordance with FCC Part 22 rules. Document Number 00000.
PAGE 11
DSPbR Series – User’s Manual Status\Individual Channel Status Status\Communications Status Document Number 00000.
PAGE 12
DSPbR Series – User’s Manual Status\System Status 5.2.7 Configure Pages Configure\Alarms Configuration Document Number 00000.
PAGE 13
DSPbR Series – User’s Manual Configure\Channel Configuration Overview Note: Frequency translation is shown in the above example screen. Frequency translation is not permitted under FCC Part 90 rules, and can only be programmed when the DSPbR is being operated in accordance with FCC Part 22 rules. Document Number 00000.
PAGE 14
DSPbR Series – User’s Manual Configure\Individual Channel Configuration Overview Configure\Communications Configuration Configure\System Configuration Document Number 00000.
PAGE 15
DSPbR Series – User’s Manual 5.2.8 Maintenance Maintenance\File Management Maintenance\User Management Maintenance\User Management Document Number 00000.
PAGE 16
DSPbR Series – User’s Manual Maintenance\Restart Repeater 5.2.9 Logout 5.3 RF Gen + Aux Module - GPS, Ext/Internal 10MHz clock reference and Cell Modem options. The Ref Gen + Aux module located at the rear of the DSPbR has a number of optional functions to assist in the synchronisation of time-based functions when more then one DSPbR is used. The Ref Gen + Aux module provides interconnectivity to and from optional signal reference sources such as GPS and an external 10MHz signal.
PAGE 17
DSPbR Series – User’s Manual The “EXT REF” SMA (F) connector is used to lock the internal reference clock with an external 10MHz reference. The required stability of this reference is +/- 3PPM with a nominal input signal level of 0dBm (0.22V RMS into 50 Ohms). The user via a tick box using the GUI interface under the Systems Configuration page enables this function.
PAGE 18
DSPbR Series – User’s Manual Cell modem installation instructions STEPS. Cellular Modem Installation (Figure 25) 1. Remove Ref Gen + Aux board from DSPbR Sub Rack Frame  Unscrew the two (2) screws retaining both the DSP Module and Ref Gen + Aux board into the frame  Pressing the lever handles outwards, carefully “pull out” the DSP module.  Once DSP module removed access to the Ref Gen board is easier, carefully pull out the Reg Gen + Aux board. 2.
PAGE 19
DSPbR Series – User’s Manual configured via the Communications Configure page – Modem Settings. For alarm notification via SMS messaging, enable the setting tick box under the Alarms configuration page. 5.4 CSC Front Panel LCD Display, Mode Button and LED’s Figure 27 – LCD Display and LED Indicators Green Active LED – Lights up and stays on once DSPbR has finished booting up. Red ALM1 LED – Lights up on critical alarm relay activation.
PAGE 20
DSPbR Series – User’s Manual The LCD display, backlight and information is powered by the standby battery in power failure mode. 5.5 Uploading / Downloading firmware Configurations The facility to dump and save a current configuration file is possible via the GUI Maintenance\File Management page, uploading and downloading a configuration file is also possible in the same manner. More than one configuration file can be saved and loaded into the DSPbR All file data is human readable.