SureCall CM2020 User manual
CM2020 Industrial
Dual-Band Cellular Booster for Commercial
Oces, Institutions and Housing Complexes.
User Guide
This is NOT a CONSUMER device. It is designated for installation
by FCC LICENSEES and QUALIFIED INSTALLERS. You MUST
have an FCC LICENSE or express consent of an FCC Licensee to
operate this device. Unauthorized use may result in signicant
forfeiture penalties, including penalties in excess of $100,000
for each continuing violation.
WARNING
CHAPTER 1: Introduction 1
1.1 - Package Contents 3
1.2-Features&Benets 3
1.3 - Additional Items Needed 3
1.4 - How It Works 4
CHAPTER 2: Safety 4
2.1 - Safety Warnings 4-5
CHAPTER 3: Planning 6
3.1 - Overview 6
3.2 - Exterior Antenna 7
3.3 - Interior Antennas 8
3.4 - Antenna Separation 9-11
3.5 - Calculating Signal Strength 11-12
3.6 - Booster Location 13
3.7 - Accessories 13
3.8 - Need Help? 14
CHAPTER 4: Installation 14
4.1 - Selecting the Locations 14
4.2 - Soft Installation 14-15
4.3 - Exterior Antenna 16
4.4 - Internal Antennas 17
4.5 - Mounting the Booster 18
CHAPTER 5: Conguration & Testing 18
5.1 - DIP Switches and Lights 19
5.2-InitialConguration 19-20
5.3 - Powering on the Booster 21
5.4 - Testing 21
5.5 - Adjusting the Booster 21
5.6 - Automatic Shutdown 22
CHAPTER 6: Warranty 22
6.1 - Warranty Periods 22-24
6.2 - Warranty Information 24
6.3 - Contact Information 24
2
Introduction
Introducing SureCall’s CM2020, Industrial booster Please read this entire manual before
proceeding. with the installation. This manual applies to the CM2020 Industrial model.
1.1 - Package Contents
Your booster box contains the following items:
• CM2020 Booster.
• Mounting kit (not shown).
• DC power supply (not shown).
• Wall anchors (not shown).
1.2 - Features & Benets
The CM2020 Industrial booster oers the following features
and benets:
• Powerful in-building booster with 31dB of adjustable gain level.
• Extends cellular signals in areas with poor coverage due to geographical and/
or building design.
• Suitable for large areas up to approximately 80,000 square feet depending on
outside signal strength and carrier frequency.
• Power control maintains maximum output power at 3 watts EIRP.
• Automatic oscillation detection and protection system powers down the
booster to prevent harmful radio interference (if equipped).
1.3 - Additional Items Needed
The CM2020 booster requires the following components for a complete
installation:
• External antenna (such as the SC-100L or SC-288W omni or SC-230D Yagi
by SureCall).
• Lightning protector (CMLP).
• Cable splitter if installing multiple antennas (up to six in a typical installation).
4
• Sucient SC-400 ultra low loss interior/exterior cable (for boosters above 55dB).
• Sucient SC-240 ultra low loss interior/exterior cable (for boosters 55dB and
below).
• Up to 6 internal antennas (such as the SC-222W, SC-223, or SC-224 omnidirec-
tional domes and/orSC-248W at panel by SureCall).
• Grounded surge suppressor for DC power
1.4 - How It Works
The CM2020 booster amplies cellular signals from the nearest tower to phones in
a building and from those phones back to the tower to compensate
for weak reception caused by distance, topography, building structure, and/or other
reasons.The booster receives the signal from an outside antenna, amplies that sig-
nal, and then rebroadcasts it via the interior antenna(s) where it is picked up by cel-
lular phones, modems, and data cards. The interior antennas also pick up signals
from cellular devices and pass them to the booster. The booster amplies these
signals and passes them to the exterior antenna for rebroadcast back to the tower.
CHAPTER 2: Safety
This chapter contains important safety information designed to prevent personal injury, equipment malfunc-
tion, and/or radio interference. You are responsible for ensuring a safe installation.
2.1 - Safety Warnings
• You are responsible for knowing and following all applicable codes and regulations and for obtaining all
required permits and inspections.
• Follow all safety precautions contained in this Installation Manual.
• The installation process may require working in high locations such as roofs and/or ladders. Follow appli-
cable safety regulations and best practices to avoid falling. Take care not to drop objects o any high area.
Cordon o ground areas directly below roof or ladder work when possible.
• Always use appropriate personal protective equipment such as goggles, gloves, hard hat, etc. as needed
and as required.
Safety
WARNING: FAILURE TO EXERCISE CAUTION WHEN
WORKING IN HIGH AREAS COULD CAUSE A FALL
AND PERSONAL INJURY.
Safety
Some components may be heavy and/or bulky. Always use proper lifting and carrying
techniques when handling components, especially when working on a ladder, roof, or other
area with a fall hazard.
• The exterior antenna must not be co-located or operating in conjunction with any other
antenna.
• Always use a properly installed SureCall lightning protector between the exterior antenna
and the booster.
• Always power o the booster before working on the roof of the building or anywhere in
close proximity to the external antenna.
• Allow at least 24 inches (60cm) of separation between interior antennas and humans or
animals.
• Allow at least 24 inches (60cm) of separation between exterior antennas and all persons.
• Comply with all antenna separation requirements to prevent signal oscillation.
CAUTION: SIGNAL OSCILLATION CAN CAUSE
RADIO INTERFERENCE WITH CELLULAR
TOWERS AND RESULT IN CIVIL AND/OR
CRIMINAL PENALTIES.
CAUTION: FAILURE TO PROPERLY INSTALL A
LIGHTNING PROTECTOR CAN RESULT IN
DAMAGE TO THE BOOSTER, ANTENNAS, AND
WIRING.
6
CHAPTER 3: Planning
3.1 - Overview
The general booster installation process follows these steps:
1. Decide where to mount the exterior antenna. This will generally be on the wall or roof of the building in
the location with the strongest signal. You will need to decide whether to use an omnidirectional antenna
mounted vertically or a directional Yagi antenna pointed directly at the cellular tower (line of sight). You
must also consider attaching a grounded lightning protector between the exterior antenna and the booster.
2. Decide where to mount the interior antenna(s), being sure to take separation requirements into account.
In general, long narrow spaces will benet most from directional at-panel antennas while more square
spaces will benet more from omnidirectional dome antennas.
3. Decide where to mount the booster. This should be in a secure indoor location near a grounded power
source.
4. Decide where to route the cables between the exterior antenna and the booster and between the
booster and interior antennas.
5. Install the antennas as described in their respective Installation Manuals.
6. Route the cables to the booster location.
7. Install the booster as described in this manual.
8. Power on the booster and perform the conguration and testing as described in this manual.
Planning
Planning
3.2 - Exterior Antenna
You may use either an omnidirectional antenna such as the SC-100-L (at area with no obstructions)
or a directional Yagi antenna such as the SC-230W (to point directly at the tower). The omnidirectional
antenna receives and transmits signals over a horizontal 360-degree circle while the Yagi antenna
receives and transmits signals over a focused area and must be aimed directly (line of sight) toward the
cellular tower that provides the best signal to the building.
The exterior antenna and mast (if any) must be mounted in a location that meets all of the following
criteria:
• Best signal strength.
• Not colocated with other antennas or used in conjunction with other antennas.
• Away from all power lines.
• 6’ from lightning rod antennas.
• 24” from all persons.
These distances are general guidelines only; refer to the applicable building and electrical codes in your
area to determine local requirements.
8
planning
3.3 - Interior Antennas
You may use any combination of omnidirectional (dome) and/or directional (at panel) interior
antennas needed to obtain optimal signal strength throughout the building or installation area. Dome
antennas such as the SC-222W, SC-223 and SC-224 provide 360-degree hemispherical coverage
suitable for mostly square areas while at panel antennas such as the SC-248W provide a focused
zone of coverage suitable for long narrow areas. The following example uses two dome antennas and
one panel antenna to provide full
coverage (exterior Yagi antenna also shown):
Keep in mind that oor structures in multistorybuildings can cause signicant signal loss, which
means that you may need to install interior antennas on more than one oor. Here is an example of
a multistory installation:
Note: Vertical separation is more important than horizontal separation. If you are unable to obtain
the required separation horizontally, try raising the exterior antenna. You may also try reducing the
booster gain as described in Chapter 5 of this manual.
planning
3.4 - Antenna Separation
Proper antenna separation is essential in order to prevent signal oscillation (feedback) that can
interfere with the cellular tower. Separation is measured in a straight line from the exterior antenna to
the closest interior antenna. The closest allowable distance depends on a number of factors such as
booster gain level, building material, etc. Recommended separation distances are:
Note: You may or may not need antennas on every oor of a multistory building depending on fac-
tors such as building material, booster gain, etc.
40dB 5-6’
45dB 15-20’
50dB 50’
55dB 60’
65dB 75-80’
70dB 100’
75dB 100’-120’
80dB 120’-180’
Amplier gain Min. separation (ad)
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planning
The easiest way to calculate the straight-line separation between antennas is to break it down into
three simple measurements and then use some basic geometry to nd the distance, as follows:
1. Measure the distances ab, bc, and cd as shown in the diagram on the next page.
- Distance from the nearest interior antenna (Point a) to the wall underneath the exterior antenna
(Point b). This is distance ab.
- Distance from Point b to directly underneath the exterior antenna. This is Point (c). This is distance
bc.
- Distance from Point c to the exterior antenna (Point d). This is distance cd.
2. Multiply ab times ab to obtain ab2.
3. Multiply bc times bc to obtain bc2.
4. Multiply cd times cd to obtain cd2.
5. Add ab2+bc2to obtain ac2.
6. Add ac2+cd2 to obtain ad2.
7. The straight-line distance ad is the square root (√) key. of the result obtained in Step 6. Example:
• Distance ab=40 feet; ab2 = 40x40=1600.
• Distance bc=10 feet; bc2 = 10x10=100.
• Distance cd=20 feet; cd2 = 20x20=400.
• ac2 = 1600+100=1700
• ad2 = 1700+400=2100
• ad = 45.83’
Here, the straight-line distance ad is just under 46 feet, which is compatible with 50dB booster gain
as indicated in the previous table.
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