BTI Wireless LPA1900 Power Amplifier User Manual
Bravo Tech (Shenzhen) Co. Ltd. Power Amplifier
User Manual
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com Revision: SP·LPA1900-120-SC01·REV.A
LPA1900-120-SC01 SPECIFICATION
1. System advantages
Bravo Tech Inc’s newly introduced 1930~1990MHz only for CDMA Carrier High
Power Outdoor Amplifier platform provides higher downlinks EIRP to extend the
coverage of existing cellular networks. The antenna used for this transmitter must
be fixed-mounted on outdoor permanent structures. This multi-carrier based
product
platform can also work with customized BTS to extend capacity of original BTS
with a low system total cost.
This product platform features:
• Support multi-carrier CDMA signals.
• Output maximum power 120W, support carriers number up to 4.
• Very High System Efficiency
• Extensive product monitoring and control (local and remote)
• Centralized system control/display/alarms
• Great system reliability supported by architecture built-in redundancy
• Powered by 30VDCavailable
• Extensive protection for lightning, voltage surge, and any high failure rate
assemblies
• Compact system size and light weight
2. System Block Diagram
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com Revision: SP·LPA1900-120-SC01·REV.A
3. Electrical Specifications
Parameter spectfication
Frequency 1930 ~ 1990 MHz
Output Power 120Watts max. ( CDMA2000)
Spurious Emission
-45dBc@Δf=885-1.25MHz, 30kHz RBW
-55dBc@Δf=1.25-1.98MHz, 30kHz RBW
-55dBc@Δf=1.25-2.25MHz, 30kHz RBW
-13dBm@Δf=2.25-4MHz, 30kHz RBW
RF Gain 57.0 ± 1.0dB @ frequency range, +30Vdc, room temp.
Normal Operating Voltage +30Vdc±1.0Vdc
Operating Voltage +29Vdc ~ +31Vdc
RF Gain Variation over
Voltage & Temperature ±1.0dB @ +29≤Vsup≤+31V, -30℃ to +55℃
Gain Flatness Peak to Peak 0.2dB over any 5MHz
Input/Output Return Loss -18dB min.
Output Protection Mismatch protected with isolator
Efficiency ≥15%@+30Volts, Po=+50.8dBm
Operating Temperature -30℃ to +55℃ (Air Temperature inside System),
Operating point Output power:52.0dBm ± 0.5dB
Operating range 6dB Input Power ALC B min
Over Pwr Output Pwr:52dBm ± 0.5dB
4. Alarm and Functions Specifications
TTL output for the alarm pins. Normal is High, Alarm is Low.
4.1 Over temperature alarm
Alarm and shutdown at 95℃ base temperature, auto-recover at 90℃ base
temperature.
4.2 Over power alarm
Alarm and shutdown when output power is over 52.3dBm, no auto-recover.
4.3 ALC
4.3.1 ALC level: 52.0±0.5dBm
4.3.2 ALC range: ≥6dB
4.4 VSWR alarm
Alarm and shutdown when reject is over 5, auto-recover at 3.
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com
Revision: SP·LPA1900-120-SC01·REV.A
Page: 3
5. Description of the connectors
5.1 RF Part
Port Name Type Warning
Input SMA Female (50Ω) Normal :-6.2dBm
maxium input power +1dBm.
Output N Female (50Ω) Normal :50.8dBm
maxium output power 52.0dBm.
5.2 DC power
Port Name Type NO Warning
A1、A2 VDC type +30V, range 24~32V
DC IN
D-Sub type
DSCD175PS1M
(Male) A3、A4 GND to VDC
5.3 Communication
Connector type: USB
Note: Manufacturer use to debug.
5.4 LED Indication
Figure 1 Power Amplifier Indicators
Table 1 Specification of Power Amplifier Indicator Light
Item Label Color State Specification
MAJOR ALM Red On
MINOR ALM Yellow Off
1
RF ON Green Off
Power amplifier alarms and shuts down
MAJOR ALM Red Off
MINOR ALM Yellow On
2
RF ON Green Off
Power amplifier alarms but still works
MAJOR ALM Red Off
3
MINOR ALM Yellow Off
Power amplifier works normally
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com
Revision: SP·LPA1900-120-SC01·REV.A
Page: 4
RF ON Green On
5.5 Warning
1. Check the power supply voltage is between 24V and 32V or not before electrify, better
to setup in 30V. Power of power supply shall bigger than 1400W.
2. Ensure the power supply polarity is right, port A1、A2 are anode, and port A3、A4 are
cathode.
3. Ensure the output line is connected and input power is not over load before connect
the RF input line.
4. Use the type N connector as output connector, for the high output power, suggest to
using the φ3 upwards RF cable to connect. At the same time, output matching deman
d all right, SWR more than 1.5 is better, but less than 3.0.
5. Product operating should be cooled by air flow, air flow more than 150cfm.
6. Product operating room temperature can’t above 50o ,also can’t below -20o。
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com
Revision: SP·LPA1900-120-SC01·REV.A
Page: 5
6. Dimension
Figure 2 Dimension
399
486
Left Right
Front
Rear
Unit: mm
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com
Revision: SP·LPA1900-120-SC01·REV.A
Page: 6
Figure 3 Mechanical drawing
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com
Revision: SP·LPA1900-120-SC01·REV.A
Page: 7
7 Assembly
The LPA1900 is assembled to an outdoor Booster. It can be push into the Booster along the guide rail.
Figure 4 the guide rail for LPA1900 assembly
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com
Revision: SP·LPA1900-120-SC01·REV.A
Page: 8
Below pictures show the location of an assembled LPA1900.
Figure 5 the front side of an assembled LPA1900
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com
Revision: SP·LPA1900-120-SC01·REV.A
Page: 9
Figure 6 the rear side of an assembled LPA1900
LPA1900-120-SC01
BRAVO TECH INC
Add.: 6185 Phyllis Drive Unit D, Cypress, CA 90630
Phone: 1-714-230-8333 Website: www.bravotechinc.com
Revision: SP·LPA1900-120-SC01·REV.A
Page: 10
There are three ports on the back of LPA1900. The SMA port is input signal port, the N-type port is output
port and the D-Sub port is power supply.
Figure 7 the location of connectors
Information to the user
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
This device must be installed by a professional installer.
The antenna(s) used for this transmitter must be fixed-mounted on outdoor permanent structures.
RF exposure compliance is addressed at the time of licensing, as required by the responsible
FCC Bureau(s) including antenna co-location requirements acc to §1.1307(b)(3).