Amphenol Procom CSR-DMT User manual

User Manual
CSR-DMT
channel selective digital TETRA repeater

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CSR-DMT
channel selective digital TETRA
repeater
Rev 3-NM, Issued Nov. 2017

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TABLE OF CONTENTS
TABLE OF CONTENTS...............................................................................................................3
CONTACT INFORMATION..........................................................................................................4
1.0 GENERAL INFORMATION.................................................................................................... 4
1.1 Abbreviations.....................................................................................................................4
1.2 Warnings............................................................................................................................5
1.3 Purpose.............................................................................................................................5
2.0 HARDWARE DESCRIPTION.................................................................................................6
2.1 Block diagram....................................................................................................................6
2.2 Filters characteristics.........................................................................................................6
2.4 Hardware AGC .................................................................................................................. 9
2.5 Connectors, indicators, buttons.........................................................................................9
3.0 INSTALLATION.....................................................................................................................11
3.1 Mechanical installation......................................................................................................11
3.2 Electrical installation........................................................................................................12
3.4 Driver installation............................................................................................................. 12
4.0 CONTROL SOFTWARE...................................................................................................... 12
4.1 System requirements....................................................................................................... 12
4.2 Overview..........................................................................................................................12
4.3 Establishing a connection................................................................................................ 12
4.4 Configuration interface.....................................................................................................13
4.7 Firmware upgrade............................................................................................................ 14
5.0 APPENDIX...........................................................................................................................15
5.1 Technical specifications...................................................................................................15
5.2 CSR-DMT view................................................................................................................ 16
COPYRIGHT ............................................................................................................................. 16

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CONTACT INFORMATION
Procom A/S
Address:
Smedetoften 12
3600 Frederikssund
Denmark
Phone: [phone]
Web: www.amphenolprocom.com
1.0 GENERAL INFORMATION
1.1 Abbreviations
ADC Analog to Digital Converter
AGC Automatic Gain Control
BTS Base Transceiver Station
DAC Digital to Analog Converter
DL Downlink
ESD Electrostatic Discharge
ETSI European Telecommunication Standards Institute
GPRS General Packet Radio Service
GSM Global System for Mobile Communications
GUI Graphical User Interface
IF Intermediate Frequency
LED Light Emitting Diode
LNA Low NoiseAmplifier
LO Local Oscillator
LTE Long Term Evolution Mobile System
MCU Main Controller Unit
OIP3 Output Intercept Point of third order
OutP1dB Output Compression Point at 1dB
PA PowerAmplifier
PM Power Meter
PSU Power Supply Unit
Rev Revision
RF Radio Frequency
RSSI Receive Signal Strength Indicator
RTC Real Time Clock
SMS Short Message Service
TETRA Terrestrial Trunked Radio
UL Uplink
UMTS Universal Mobile Telecommunication System
USB Universal Serial Bus
VCO Voltage Controlled Oscillator
VSWR Voltage Standing Wave Ratio
WCDMA Wide-band Code Division MultipleAccess

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1.2 Warnings
Only qualified personnel can work with this unit.
Before using read all given specifications and manuals. Using the unit follow the recommendations and
rules given in the related documents.
Keep operating manual within easy reach and make them available to all users.
It's the responsibility of the network provider to implement preventing measures to avoid health hazards
that may be associated with radiation from the single or multiple antennas connected to the unit.
Installing and using the unit follow all obligatory regional regulations.
Use this unit only for the purpose specified by the manufacturer.
ESD precautions must be observed.
Make sure the unit settings are in accordance with the intended use and regulatory requirements.
1.3 Purpose
The full band repeater CSR-DMT is a bi-directional digitally controlled amplifier that offers an increase of
signal strength in small and medium-sized rooms.
Generally TETRA repeaters are used in emergency services and government systems to provide signal
coverage for areas with poor or no signal (e.g. blind spot). Procom A/S came across the insufficient
coverage within buildings, airports, tunnels, etc. The digital repeater CSR-DMT series can solve these
problems by amplifying the available signal from an outdoor antenna into weak coverage areas via an
antenna or indoor delivery network with multiple antennas.
CSR-DMT is based on a digital filtering approach thanks to that the CSR-DMT is very flexible in
continuously changing conditions of mobile communication systems. The digital filter can be reconfigured
in a custom desired way:
•Full band (5 MHz) is default configuration (factory settings)
•Additionally it is possible to adjust bandwidth and center frequency of band-segment
•Possible number of band-segments is 1-4
•adjustable gain of individual band-segment
Built-in Automatic Gain Control circuit prevents the occurrence of undesired oscillations, signal
compression and distortion conditions.

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2.0 HARDWARE DESCRIPTION
2.1 Block diagram
Presence of various nodes can be different for different ordering options of CSR-DMT.
2.2 Filters characteristics
In this section digital filter characteristics are described. Digital filter node is purely software based, thanks
to that it is possible to reconfigure selective filters in a desired way without any change to the hardware. In
the next picture some examples of possible filter configuration are given.
Each direction can have up to four band-segments. Each segment bandwidth can be selected from a
range of 25 kHz up to 5 MHz. Bandwidth adjustment steps for bands 25 kHz up to 1MHz is 25 kHz.
Bandwidth adjustment steps for bands 1.1 MHz up to 5 MHz is 100 kHz.
Filters have selectivity properties according to ETSI TETRA standards. All filters can be divided into two
different groups. Filters from first group have better selectivity.
Table 1. Filter groups
Group number
Passband
1
25 kHz - 1 MHz (step 25 kHz)
2
1.1 MHz - 5 MHz (step 100 kHz)
Figure 1. CSR-DMT block diagram

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If needed the repeater pass band can be constructed from two or more segments. For instance using
such a composite method with filters from group 1 (see table above) it is possible to make wideband filter
with best selectivity properties.
Applying composite method it must be taken into account the real transition band in amplitude-frequency
response of the filter. Putting filters pass-bands in “edge to edge” style there will exist a high probability to
get distortions in amplitude and phase of composite filter. To smooth such effects it is recommended to put
particular segments with small offset 50 - 400 kHz. For best modulation performance do not use
composite bands.
Below different examples of bandwidth filters are shown. All filters are demonstrated in base-band with
half-bandwidth. Due to digital nature filter shapes are stable and symmetrical over entire frequency range.

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Figure 3. One 25 kHz segment
Figure 4. One 100 kHz segment
Figure 5. One 5 MHz segment

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2.4 Hardware AGC
Hardware automatic gain control (AGC) circuit is intended to prevent undesired oscillations and spurious
emissions. The repeater can experience oscillating conditions due to wrong installation factors like small
isolation between outdoor donor and indoor coverage antenna isolation. In the case of too high input
signal hardware AGC limits the total output power to a value in dBm specified for each model.
Two orange LEDs (DL and UL separately) show the activity of hardware AGC. If they are active, input
signal is too high or repeater is oscillating.
In case of higher input signal built-in additional digital step attenuator can be used to decrease gain of the
repeater. Also using directional donor antenna or a different faraway BTS could be chosen.
2.5 Connectors, indicators, buttons
SMA connector has a torque 0.5 N/m. N-type connectors have a torque 1.3 N/m. Use appropriate tools
when working with these connectors.
For installation convenience control part (LEDs, USB, RESET button) is placed on inside of the CSR-DMT
in front position. On bottom side of the CSR-DMT RF connectors, power supply input and other additional
connections are placed.

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Figure 6. CSR-DMT bottom view and top view

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Table 2. Description of connectors, indicators and buttons
Number
Description
1
Reserved LED
2
Orange LED, uplink hardware AGC loop activity indicator
3
Orange LED, downlink hardware AGC loop activity indicator
4
Green LED, MCU activity indicator, proper power supply indicator:
- very slow blinking - power down mode
- normal blinking - power up mode (normal operation)
- fast blinking in case of wrong power supply
5
Red LED, MCU status indicator: busy or free
6
Red LED, error event indicator
7
USB input
8
Reset button
9
Repeater unit
10
Power supply module
11
Indoor antenna connector
12
Pressure valve
13
Power supply 230VAC-input (PG-type)
14
Donor/Outdoor antenna connector
3.0 INSTALLATION
3.1 Mechanical installation
Figure 7. CSR-DMT mechanical dimensions

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3.2 Electrical installation
Electrical installation must be performed in accordance with all the local regulations. Electrical
installation must be performed by qualified personnel only. Do not open repeater case without
required qualification!
For details about connectors see “2.5 Connectors, indicators, buttons” section of this manual.
1. Connect donor and indoor antennas to corresponding RF ports.
2. Align donor antenna toward desired BTS.
3. If 230VAC cord will be connected right at site, see right electrical clamp types.
4. Check all connections/nodes one more time.
5. Connect 230 V AC cable.
1. In case it is needed, connect USB to CSR-DMT and run PROCOMA/S control software
to reconfigure repeater.
6. See activity of AGC LEDs. For details refer to section “2.4 Hardware AGC”.
3.4 Driver installation
Microsoft Windows 7 and later already ship with required driver to run Procom control software.
In case of Windows XP run ‘CDM v2.12.10 WHQL Certified.exe’ file.
4.0 CONTROL SOFTWARE
4.1 System requirements
CSR-DMT control software requires a personal computer with:
•At least one USB port and
•Microsoft Windows XP, Vista, 7 or 8 operating system
(both 32 bit or 64 bit systems are supported).
4.2 Overview
CSR-DMT control software is a GUI tool for repeater configuration. It can be used to set repeater
frequency response, adjust gain and monitor health state.
Configuration interface (see section “4.4 Configuration interface” of this manual) is used to:
•set repeater frequency response,
•adjust gain and control software AGC settings,
•store predefined configurations,
•monitor measurements and health state,
•remotely turn repeater on and off.
CSR-DMT repeater can store up to 16 different filter configurations. Each configuration stores not only the
filter settings, but also power and software AGC settings. However, there can be only one active
configuration.
4.3 Establishing a connection
On DR_Ctrl startup “Select Communication Channel” dialog appears. Select the COM port that is
connected to the repeater and press ‘OK’. Program will proceed to load repeater configuration.

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4.4 Configuration interface
The CSR-DMT repeater has 4 band-segments. Each band-segment (Ch1 – Ch4) can be switched on and
off with a check box on the left (Figure 8, 1). Center frequency and bandwidth are changeable. Minimum
bandwidth is 25 kHz (one TETRA channel). Maximum bandwidth is 5MHz (full-band mode).
Frequency bandwidth in kHz is displayed in the “Band” boxes (Figure 8, 2) and center frequency in MHz is
displayed in “Center Freq Up” boxes (Figure 8, 3) . Cut-off frequencies for up and down links are
displayed in “UpLink From/To” (figure 8, 4) and “DownLink From/To” boxes (figure 8, 5).
Enabled bands are allowed to be side-by-side, like (UpLink) Ch2 from 380 MHz to 382 MHz and Ch3 from
382 MHz to 385 MHz, but if bands are overlapping warning message shows and button “Send Config” is
disabled. It is impossible to send such configuration to the repeater.
Channel attenuation can be adjusted manually for each channel (figure 8, 6 uplink) and also for all four
channels of up (figure 8, 7 uplink) and down links jointly with physical attenuators (see figure 1 “CSR-DMT
block diagram” for details). Resulting gain for each channel is displayed in the “Total Gain” boxes for up
and down links.
Repeater power could be switched on and off by “Repeater Power” selector individually for each
configuration and software AGC (independent from built-in hardware AGC loop) can be enabled or
disabled individually for each configuration with “AGC” selector (figure 8, 8).
Repeater name and serial number are displayed in the information boxes below power and AGC settings.
Information box above AGC settings shows configuration state. Values can be “Configuration changed” -
meaning repeater has different configuration than shown in DR_Ctrl; and “Configuration updated” -
meaning repeater and DR_Ctrl configs match.
Repeater health state and measurements are displayed in information blocks “Health State” and
“Measurements” (figure 8, 9). User must click on either box to reread the data from repeater. “Health
State” boxes are green and “Fault Code” box contains zeroes while repeater is in good health. If there is
problem like overheating or power supply voltage is out of range, corresponding boxes will turn red.
Measured values of RF power in up and down links, power supply voltage and temperature inside
repeater are displayed in the “Measurements” block.
To enable Measurements and Health State automatic refresh check “Autoupdate” check box, buttons
become disabled while autoupdate is active to avoid message collision.

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Up to 16 different configurations can be stored in repeater. Box “Active Config” shows which one of 16
stored configurations is currently active. “Repeater” tab has configuration index selector “Cfg indx” and
buttons “Send Config”, “Read Config”, “Activate Config” (figure 8, 10).
“Read Config” button allows to read configuration selected in “Cfg indx” box. If index selected in “Cfg indx”
box is the same as in “Active Config” box then we are dealing with the currently active configuration.
“Send Config” button sends configuration visible on “Frequencies” tab to the configuration slot selected in
“Cfg indx” box. Pressing “Activate Config” button makes configuration selected in “Cfg indx” box active.
There are two buttons on the “Local Files” tab (see figure 9). “Save This Config To File” button allows to
save configuration visible on “Frequencies” tab to a local file. “Load Config From File” button loads such
file to the “Frequencies” tab controls. Loaded configuration can be sent to repeater using “Send Config”
button.
4.7 Firmware upgrade
CSR-DMT firmware is user upgradeable. Firmware upgrade can be performed locally over a direct USB
connection. To perform the upgrade, please contact manufacturer. Manufacturer will supply all the
necessary software and up to date instructions.
Figure 8
“Frequencies” tab
Figure 9. “Local Files” tab

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5.0 APPENDIX
5.1 Technical specifications
Table 3. Technical specifications
Parameter
Specification
Frequency range*
CSR-DMT-380: Uplink: 380-385 MHz & Downlink: 390-395 MHz
CSR-DMT-410: Uplink: 410-415 MHz & Downlink: 420-425 MHz
Number of independent band-segments
Uplink: 1 up to 4
Downlink: 1 up to 4
Band-segment center frequencies
Adjustable through software within
specified above frequency range with step 12.5kHz
Bandwidth
Full band mode: 5 MHz
Selectivity mode 1: 25 kHz-1MHz with step 25 kHz
(adjustable through software)
Selectivity mode 2: 1.1-5 MHz with step 100 kHz
(adjustable through software)
Max. gain
>70 dB, typ. 75 dB
Full-band flatness
±3 dB, typ. ±2 dB
Manual gain adjust range
50 dB totally:
hardware input attenuator 30 dB (step 1 dB)
DSP interstage attenuator for each band-segment 20 dB (step 1dB)
Automatic gain control
>60 dB
Downlink output power*
+19 dBm @ one carrier
+16 dBm @ two carriers
+13 dBm @ four carriers
Uplink output power*
+19 dBm @ one carrier
+16 dBm @ two carriers
+13 dBm @ four carriers
Noise figure
4.0 dB
Input RF-range
-110...-15 dBm
Supply voltage
AC: 230V, 50Hz
RF inputs
N-Female, 50Ω
Local control interface
USB
Operating temperature range
0 … +40 ºC
Power consumption
27 W (full activity)
Enclosure
IP55 case, 300x291x103mm, mounting on wall (see figures 10, 11)
Absolute maximum RF Input
+15 dBm
* Ask Procom A/S for other parameters. See www.amphenolprocom.com for more information.
Procom A/S reserves the right to change the specification without notice.

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5.2 CSR-DMT view
Figure 10. CSR-DMT enclosure (IP55), closed top panel
Figure 11. CSR-DMT enclosure, open top panel
COPYRIGHT
© Copyright 2011-2017 Procom A/S. All rights reserved.
All information contained in given manual has been revised thoroughly. However, Procom A/S accepts no
liability for any omissions or faults and assumes no responsibility for its use. Procom A/S reserves the
right to change all hard- and software specifications and other product related documentation without
notice. No parts of this document may be reproduced, stored in a retrieval system, transmitted in any form
or by any means, electronical, mechanical photocopying, recording or otherwise, without prior written
permission from Procom A/S.
All mentioned trademarks, logos, and copyrights are property of their respective owners.