Andrew Wireless Innovations Group MR803D, MR853D, MR903D, MR1903D user manual

User's Guide for MR803D, MR853D, MR903D and MR1903D miniRepeaters

TABLE OF CONTENTS

1. Safety and Environmental................................... 1

2. Quick-Start Checklist........................................... 1

3. RF and Power Connectors..................................1

4. Functional Description........................................ 2

5. Cabinet Drawing................................................... 2

6. Wall Mounting....................................................... 2

7. Mechanical Specification.................................... 2

8. Environmental and Safety Specifications......... 2

9. 20 dB Bandwidth..................................................2

10. Start-Frequency Switch Settings ....................... 3

11. Standard Frequency Band Settings...................5

12. Attenuation Setting..............................................7

13. Alarming and Supervision .................................. 7

13.1. Functional Description of the Alarming-Interface 7

13.2. Output-Contact Configuration 7

13.3. Output-Contact Descriptions 8

14. Heartbeat Setting ................................................. 8

15. List of Changes.................................................... 8

1. Safety and Environmental

The electrical installation has to be performed in
accordance with the safety regulations of the local
authorities. Due to safety reasons, the electrical
installation must be performed by qualified
personnel only. The repeater must not be opened.
The antennas of the repeater (integrated and / or
external) have to be installed in a way that the
regional and national RF exposure compliance
requirements are met.

To comply with FCC RF exposure compliance
requirements, the following antenna installation
and device operating configurations must be
satisfied: A separation distance of at least 20 cm
must be maintained between the antenna of this
device and all persons. RF exposure compliance
may need to be addressed at the time of licensing,
as required by the responsible FCC Bureau(s),
including antenna co-location requirements of

1.1307(b)(3). Maximum permissible antenna gain
is 12 dBi.

The miniRepeaters must only be used for

indoor applications!

2. Quick-Start Checklist

 Adjust channel(s); see chapter 10.
 Mount the repeater; see chapter 6.
 Install donor and coverage antennas.
 Provide the repeater with power; see chapter 3.
 Adjust the attenuation; see chapter 12.

Start the adjustment with the maximum attenuation
and decrease attenuation until the ALC becomes
active and the ALC alarm LED lights up. Then
increase attenuation until the ALC alarm is inactive
again.

or

 Select auto-setup; see chapter 12.
 Check for alarms; see chapter 13.

3. RF and Power Connectors

G0783ZR

The miniRepeaters are equipped with two RF antenna
ports: one antenna port that provides RF signals
to/from mobile(s) and another antenna port on the
opposite side of the miniRepeater that provides RF
signals side to/from the BTS. Both of these
connectors are SMA-Female. Two coaxial jumper
cables are included with the miniRepeaters to provide
N-female connection ports.

The socket for the DC supply is situated to the right of
the “to/from BTS” RF connector. The power supply
voltage for this connection point is 6.7 to 7.5 VDC,
with a typical current draw of 1.7 amps. Only the
Power Supply Unit (PSU) supplied with the
MiniRepeater must be used.

An alternative method to provide power to the
MiniRepeater is through the “to/from BTS” RF
connector via the coaxial cable and a bias-T at the
source. The DC socket of the repeater must not be
connected if the unit is biased via the RF port.

M0041AMB.doc ID No 7164468

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4. Functional Description

The operation principle of the miniRepeaters is given
with regard to the following block diagram.

Attenuation
setting

manual
automatic

User's Guide for

MR803D, MR853D, MR903D and MR1903D

6. Wall Mounting

Mounting
bracket

Wall

E0783B0

Downlink signals from the BTS reach the internal
duplexer through the “to/from BTS” RF port. Following
the DL path from the duplexer, the RF signals are
amplified by an LNA, which feeds the amplified
signals to a mixer. The mixer converts the signals
down to an intermediate frequency (IF), where a high
rejection IF filter provides excellent selectivity to allow
only the user’s frequency band to be repeated. After
the IF filter, the signals are re-converted to the original
frequency by means of another mixer. A final amplifier
boosts the RF signals to the required output power.

After the final amplifier, a power detection circuit
measures the output power and controls the gain
through a closed loop feedback circuit. This feature is
the automatic level control (ALC), which prevents the
repeater from being overdriven and maintains
intermodulation products and spectrum emissions
below the regulation limits. Finally, the RF signals are
fed to the external antenna through the duplexer and
“to/from Mobile” RF port.

The uplink signals are received by the external
antenna through the “to/from Mobile” RF port and are
then fed to the duplexer. After the duplexer the RF
circuitry and functionality is identical to the downlink
path, which provides high rejection filtering for the
desired operation frequency band and ALC
functionality.

5. Cabinet Drawing

G0825Z8

miniRepeater

V1550_X03

The miniRepeater may only be mounted
horizontally to a wall according to the above
drawing to ensure the natural convection
cooling. Do not

mount the miniRepeater to the

ceiling!

Always choose a mounting location that
avoids condensation!

7. Mechanical Specification

Size H x W x D
Weight 0.7 kg

Sealing Class IP30

8. Environmental and Safety Specifications

The environmental specifications are according
to ETS 300 019 (European Telecommunication
Standard) and the safety specifications are
according to UL Std No 1950 and CAN/CSA­C22.2 No. 60950. For further details please ask
your supplier.

9. 20 dB Bandwidth

MR803D, 18 MHz Filter 18.7 MHz
MR853D, 1.5 MHz Filter 2.1 MHz

MR853D, 10 MHz Filter 10.7 MHz
MR853D, 12.5 MHz Filter 13.2 MHz
MR853D, 25 MHz Filter 24.7 MHz

MR903D, 6 MHz Filter 6.6 MHz
MR1903D, 5 MHz Filter 7.0 MHz

MR1903D, 10 MHz Filter 11.0 MHz
MR1903D, 15 MHz Filter 16.0 MHz

114 x 154 x 51.5 mm
(4.5 x 6.1 x 2.0 inch)

20 dB bandwidth

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Andrew Wireless Systems GmbH * Industriering 10 * 86675 Buchdorf * Germany *

Phone: [phone] * Fax: [phone] *

email: [e-mail] * http://www.andrew.com

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10. Start-Frequency Switch Settings

As described in chapter 4 Functional Description, the
miniRepeaters utilise a high rejection filter to allow
only the desired frequency band to be repeated. The
miniRepeaters are available in different bandwidths
with field adjustable start frequencies to support the
desired frequency band of the user.

Two rotary switches, located on the side of the
miniRepeater, are provided for setting the start
frequency (SF) of the high rejection filter. The SF of
the high rejection filter may be adjusted in either 200
or 250 kHz steps, dependent upon the miniRepeater
model.

miniRepeater Model: MR803D

Start Frequency

Setting 1

0 0 796.00 841.00
0 1 796.20 841.20
0 2 796.40 841.40

… … … …

0
1 0 799.20 844.20
1 1 799.40 844.40

…

1

… …

F
F

…

F F

Start Frequency

Setting 2

F

…

F

0 844.00 889.00
1 844.20 889.20

… … …

Following are tables that show the filter band-pass
start frequencies corresponding to the switch settings.
The following section will show tables of standard
user settings.

SF setting 1

ositions 0 - F

SF setting 2

ositions 0 - F

Rotary switches for start-frequency setting

Frequency Step Size: 200 kHz

Start Frequency

UL (MHz)

799.00 844.00

… …

802.20 847.20
… …

847.00 892.00

Start Frequency

DL (MHz)

Start-frequency setting MR803D

miniRepeater Model: MR853D

Start Frequency

Setting 1

0 0 814.00 859.00
0 1 814.20 859.20
0 2 814.40 859.40

… … … …

0
1 0 817.20 862.20
1 1 817.40 862.40

… … … …

1

… … … …

F
F

Start Frequency

Setting 2

F

F

0 862.00 907.00
1 862.20 907.20

… …

F F

Start-frequency setting MR853D

M0041AMB.doc ID No 7164468

Frequency Step Size: 200 kHz

Start Frequency

UL (MHz)

817.00 862.00

820.20 865.20

… …

865.00 910.00

Start Frequency

DL (MHz)

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