including, but not limited to, component substitution and circuitry changes. Changes that impact this
manual may subsequently be incorporated in a later revision of this manual.
This Powerwave product is designed to operate within the Normal Operating (typical operating) ranges or
conditions specified in this document. Operation of this equipment beyond the specified ranges in this
document may cause (1) spurious emissions that violate regulatory requirements; (2) the equipment to be
automatically removed from service when maximum thresholds are exceeded; or (3) the equipment to not
perform in accordance with its specifications. It is the Operator's responsibility to ensure this equipment is
properly installed and operated within Powerwave operating specifications to obtain proper performance
from the equipment and to comply with regulatory requirements.
044-05xxx Rev A
Warnings, Cautions, and Notes
Warnings, cautions, and notes are found throughout this manual. The associated icons in warnings and
cautions are used to quickly identify a potential condition that could result in the consequences described
below if precautions are not taken. Notes clarify and provide additional information to assist the user.
WARNING This warning symbol means danger. You are in a situation that could
cause bodily injury. Before you work on any equipment, be aware of the
hazards involved with electrical and RF circuitry and be familiar with
standard practices for preventing accidents.
CAUTION
Note
This caution symbol means reader, be careful. In this situation, the user might do
something that could result in equipment damage or loss of data.
This note symbol means reader, take note. Notes contain helpful suggestions or
references to material not covered in the document. Procedures are not
contained in notes.
Table 5-2. Test Equipment Required.........................................................................................................5-1
Table 5-3. Amplifier Performance Data .....................................................................................................5-5
iv044-05xxx Rev A
Chapter 1
General Description
1-1 Introduction
This manual contains information and procedures for installation and servicing of Powerwave’s G3H-85180 Amplifier. The manual is organized into two chapters as follows:
Chapter 1General DescriptionChapter 4Principles of Operation
Chapter 2InstallationChapter 5Maintenance
Chapter 3Operating InstructionAppendix AGlossary of Terms
1-2 General Description
The G3H-851-80 Power Amplifier, shown in Figure 1-1through Figure 1-4, operates in the 18 MHz
frequency band from 851 MHz to 869 MHz with an instantaneous bandwidth of not more than 18 MHz.
The instantaneous bandwidth is the maximum frequency band in which any two or more signals can
occupy .The amplifier’s instantaneous bandwidth is set automatically and does not require any manual
setup.
Front
Figure 1-1. Model G3H-851-80 Amplifier Front and Rear Isometric View
044-05xxx Rev A1-1
Rear
0.389 in.
(0.99 cm)
17.06 in.
(43.33 cm)
1.59 in.
(4.03 cm)
12.09 in.
(30.70 cm)
1.90 in.
(4.82 cm)
13.96 in.
(35.45 cm)
19.58 in.
(49.73 cm)
Figure 1-2. Model G3H-851-80 Amplifier Side View
3.86 in.
(9.80 cm)
1-2
Figure 1-3. Model G3H-851-80 Amplifier Bottom View
044-05xxx Rev A
RS-232
Port
Combo
Connector –
Power. Alarms,
and RF I/O
Figure 1-4. Model G3H-851-80 Amplifier Front Panel
044-05xxx Rev A1-3
1-3 Specifications
Electrical, mechanical, and environmental specifications for the G3H-851-80 amplifier are listed in
Table 1-1.
Table 1-1. G3H-851-80 Amplifier Specifications
Frequency Range851-869 MHz;
Maximum Instantaneous Bandwidth18 MHz bandwidth (lowest to highest transmitted frequency)
Carrier TypesIDEN, 1X-EVDO/IS-95
Minimum Channel Spacing1.25 MHz for 1X-EVDO/IS-95, 30 kHz for iDEN
Total Maximum Input Power-11.69 dBm @ 80 Watts (to achieve rated power);
-11.01 dBm max. –5.7 dBm or greater causes input overdrive
shutdown.
Total Average Output Power
DC/RF Conversion Efficiency> 16%
Intermodulation Distortion
and In-Band Spurious:
RF Gain at 869 to 894 MHz63 dB +1 dB
Gain Flatness:+0.5 dB @ 26 – 28 Vdc
Gain Variation Over Temperature:
Output Protection:Mismatch protected
Input Port Return Loss:11 dB
Out of Band Spurious:Better than –60 dBc, +26 Vdc to +28 Vdc
Spurious PerformanceITU-R SM329-9, Category A, non-carrier related
Duty Cycle:Continuous
DC Input Voltage:
+27 Vdc ± 1 Vdc, operational range +21.0 Vdc to 30 Vdc amplifier will
disable at < 20.5 Vdc or > +30.5 Vdc.
DC Input Current:
Operating Temperature:-33 ºC. to +50 ºC.
Storage Temperature:-40 ºC. to +85 ºC.
Operating Humidity:5 % to 95 % relative humidity (non-condensing)
Storage Humidity:5 % to 95 % relative humidity (non-condensing)
Altitude-50 to +4000 M (-164 to 13,125 ft.)
RF Input / Output / Status / Alarm /
Control / DC Input Connectors:
Maintenance PortRJ-11, RS-232 (for factory use only)
SwitchesReset/On/Off Switch
1-4
26.5 Amps typical @ 80 W out,
28 A max @ 80 Watts (over temperature or over voltage);
21-Pin D-Subminiature combo connector
Continued next page
044-05xxx Rev A
Indicators:
STATUS
Dimensions:35.46 cm wide, 9.56 cm high, 45.0 cm deep (including handles)
Weight:13 kg (28.6 lb.)
LED; Green (normal), Yellow (minor alarm), Red (critical alarm)
Note
This Powerwave product is designed to operate within the normal operating (typical
operating) ranges or conditions specified in this document. Operation of this equipment
beyond the specified ranges may cause (1) spurious emissions that
violate regulatory requirements; (2) the equipment to be automatically removed from
service when maximum thresholds are exceeded; or (3) the equipment to not perform in
accordance with its specifications. It is the operator's responsibility to ensure this
equipment is properly installed and operated within Powerwave operating specifications to
obtain proper performance from the equipment and to comply with
regulatory requirements.
Industry Canada: The Manufacturer's rated output power of this
equipment is for single carrier operation. For situations when multiple carrier signals are
present, the rating would have to be reduced by 3.5 dB, especially where the output
signal is re-radiated and can cause interference to adjacent band users. This power
reduction is to be by means of input power or gain reduction and not by an attenuator at
the output of the device.
1-4 Ordering Information
Table 1-2 lists major system component numbers and descriptions for use in ordering.
Table 1-2. Major System Components
Model NumberDescription
G3H-851-8080-Watt Amplifier, +27 Vdc
*Amplifier sub-racks sold and described separately
044-05xxx Rev A1-5
(Page intentionally left blank)
1-6
044-05xxx Rev A
Chapter 2
Installation
2-1 Introduction
This chapter contains unpacking, inspection, and installation instructions for the G3H-851-80 Multi-Carrier
Power Amplifier (MCPA). Carefully read all material in this chapter prior to equipment installation. Also,
read and review the operating procedures in chapter 3 prior to installing the equipment.
2-2 Unpacking and Inspection
This equipment has been operated, tested, and calibrated at the factory. Only in the event of severe
shocks or other mistreatment should any substantial readjustment be required. Carefully unpack each
piece of equipment after it has reached the installation site and is approximately in place. Carefully open
the amplifier containers and remove the contents. Inventory all items to ensure all needed materials have
been delivered.
Retain all packing material to support any claim of shipping damage or for use in the event that the
equipment must be returned to the factory.
CAUTION
Visually inspect the Amplifier for damage that may have occurred during shipment as follows:
1. Inspect the MCPA for damage that may have occurred during shipment.
2. Check for evidence of water damage, bent or warped chassis, loose screws or nuts, or extraneous
packing material in the connector(s).
CAUTION
If the equipment is damaged:
• The carrier is your first area of recourse.
• A claim should be filed with the carrier once the extent of any damage is assessed. We cannot
stress too strongly the importance of IMMEDIATE careful inspection of the equipment and the
subsequent IMMEDIATE filing of the necessary claims against the carrier, if necessary.
If the equipment is damaged and must be returned to the factory:
• Please write or phone for return authorization.
Exercise care in handling equipment during inspection to prevent damage
caused by rough or careless handling.
Before applying power, make sure that all connectors are secure. Make sure that the
input and output are properly terminated at 50 ohms. Do not operate the amplifier
without a load attached. Refer to Table 1-1 for input power requirements. Excessive
input power may damage the equipment.
• Powerwave may not accept returns without a return authorization.
2-3 Air Conditioning
Each G3H-851-80 amplifier generates 1981 BTU/hour of heat at full 80-Watt power. A 1-ton air
conditioner offsets 12,000 BTUs per hour of heat. Each sub-rack, exclusive of amplifiers, generates
044-05177 Rev A2-1
approximately 42 BTU per hour of heat. The G3H-851-80 amplifier is designed to operate within the
extended low temperature and high temperature environments defined in Table 1-1.
Table 2-1 describes the heat load (at 80 Watts typical) for a 3-sector (70%), 2-sector (80%), omni (90%),
and typical (100%) site. Perform a site survey to determine actual air conditioning needs.
Table 2-2 lists the current consumption at 27 Vdc.
Table 2-2. Averaged DC Current Load
Amplifier
Power
80488.8 A106 A
80366.6 A72.6 A79.5 A
80244.4 A48.4 A50.2 A53 A
80122.2 A24.2A25.1 A26.5 A
No. Of
Amplifiers
3-Sector (70%)
Averaged Current
2-Sector (80%)
Averaged Current
1-Sector (90%)
Averaged Current
100%
Typical
100%
Typical
2-2044-05177 Rev A
2-5 Installation Instructions
Install the G3H-851-80 amplifier as follows:
WARNING Turn off external primary DC power before connecting DC power
cables.
2-5.1 Installing the Amplifier into a Sub-rack
1. Inspect the 21WA4 male combo connector (Figure 2-2) on the rear of each amplifier. Verify that all
pins are straight, no pins are recessed, packing material is removed, and that the alignment shield is
not bent.
2. Set the power Reset/On/Off switch on each amplifier to “Off” (down position) as shown in Figure 2-1.
CAUTION
Do not slam or force the amplifier into the sub-rack. This may cause the pins
on the combo connector of the amplifier to become recessed or broken.
3. With the thumbscrews in the unlock position, install the amplifier(s) into the sub-rack, positioning
each in accordance with the information in the system manual. Turn the top and bottom thumbscrews
to the lock position as shown in Figure 2-1 to secure the amplifier(s) in the sub-rack.
WARNING Check your work before applying DC voltage to the amplifier. Make
certain all connections are tight and correct.
4. Measure primary DC input voltage. DC input voltage should be +27 Vdc ±1.0 Vdc. If the DC input
voltage is above or below the limits, call and consult an electrician before you turn on your amplifier
system.
5. Refer to Chapter 3 for initial turn-on and checkout procedures.
Unlocked
Position
3-Position Switch:
Reset (Up)
On (Middle)
Off (Down)
Locked
Position
Figure 2-1. Power Switch Functions and Unlocking/Locking Thumbscrews
044-05177 Rev A2-3
2-5.2 Combo Connector
The power, alarm, control, and RF connections on the amplifier are made through a 21WA4 male
connector, located on the rear of the amplifier. Pins are listed and described in Table 2-3. Alarms are
interpreted by the amplifier sub-rack and reported to the base station as a system level alarm.
1 2 3 4 5 6 7 8 9
A1
A2
10 11 12 13 14 15 16 17
A3
A4
Figure 2-2. Combo Connector (Male, on Rear of G3H-851-80 Amplifier Module)
Table 2-3. G3H-851-80 Amplifier Combo Connector Signal List
Pins/Signal Names
A1RF Input (Coaxial Contact)
A2+27 Vdc (Power Contact)
A3Ground (Power Contact)
A4RF Output (Coaxial Contact)
1TX H (RS-485)10System Reset TTL
2TX L (RS-485)11NC
3GND12NC
4RX H (RS-485)13AMP AO
5RX L (RS-485)14AMP A1
6GND15AMP A2
7MOD_DET16NC
8Summary Fault17MCPA Temp
9DC (On/Off)
2-4044-05177 Rev A
Chapter 3
Operating Instructions
3-1 Introduction
This chapter contains a description of the G3H-851-80 Multi-Carrier Power Amplifier (MCPA)
controls, indicators, and initial start-up and operating procedures.
3-2 Controls and Indicators
The controls and indicators for the G3H-851-80 Power Amplifier consist of the primary power
RESET toggle switch, the LED STATUS indicator, and the RJ-11 PC Interface as shown in
Figure 3-1.
3-2.1 RESET Switch
The RESET Switch, located on the front panel, has three positions, each with its own function.
• The momentary up position resets fault indications and returns the MCPA to normal
operation if a critical or hard fault does not prevent such operation. When the switch is
released, it automatically returns to the middle position.
• The middle position allows normal operation. If no critical faults are present, the MCPA
operates normally.
• The down position is used to turn the MCPA off. The MCPA remains disabled until the
switch is manually returned to the middle position.
RJ-11 PC
Interface
Reset/On/Off
Toggle Switch
Figure 3-1. G3H-851-80 Controls and Indicators
Multi-Colored LED
Status Indicator
3-2.2 LED Status Indicator and RESET/On/Off Toggle Switch
The status indicator, located on the front panel, is a single, tri-color LED. Status is indicated by a
combination of color and intermittent/steady operation. The LED has tri-color capability: red,
yellow, and green. The LED’s blinking frequency is 0.5-1 Hz with a duty cycle of 45-55%. The
LED indicates the status of the MCPA as listed in Table 3-1.
044-05177 Rev A3-1
Table 3-1. Status Indicator Colors and Status
Control/IndicatorDescription
STATUS (Multi-colored
LED Indicator)
Toggle Switch Positions
RESET (Up)Amplifier in RESET mode. LED indicates Boot mode, then turns solid
On (Middle)Amplifier enabled. LED indicates solid green
Off (Down)Amplifier RF disabled. LED Indicates solid red.
LED ColorMCPA Status
Green (solid)RF enabled, Reset/On/Off switch set to On
(middle position). Operation normal.
Green (blinking)Standby.
Yellow (solid)Minor* alarm - APC function enabled.
Yellow BlinkingVSWR Warning.
Red (solid)Major* alarm – Critical fault present. If
present on only one amplifier, amplifier
replacement required. If present on all
amplifiers in a sub-rack, a fault likely exists in
the sub-rack or in the RF load attached to
the sub-rack.
Red/Yellow (alternating)Downloading. Do not interrupt power.
green.
* See Table 4-1 for an explanation of major and minor alarms.
3-2.3 RJ-11 PC Interface
The RJ-11 PC Interface connector located on the front panel is for updating the amplifier’s
firmware, and is for factory use only.
3-3 Initial Start-Up and Operating Procedures
To perform the initial start-up, proceed as follows:
1. Verify that all input and output cables are properly connected.
CAUTION
Note
2. Turn on the supply that provides +27 Vdc to the amplifier.
3. Place the power 3-position (Reset/On/Off) switch on the amplifier front panel to the On
(middle) position.
4. Allow the amplifiers to warm up for at least 5 minutes before taking power readings.
Before applying power, make sure that the input and output of the amplifier
are properly terminated at 50 ohms. Do not operate the amplifier without a
load attached. Refer to table 1-2 for input power requirements. Excessive
input power may damage the amplifier.
The amplifiers must be warmed up for a minimum of 5 minutes prior to
setting power levels. Failure to properly warm the amplifiers may result in
lower output power, once the amplifiers reach operating temperature.
3-2044-05177 Rev A
Chapter 4
Principles of Operation
4-1 Introduction
This chapter contains functional descriptions of the G3H-851-80 Multi-Carrier Power Amplifier
(MCPA).
4-2 RF Input Signal
The maximum input power for all carrier frequencies to the MCPA should not exceed the limits
specified in Table 1-1
4-3 RF Output Load
For good power transfer to the RF load, the load impedance should be as closely matched to the
output impedance of the MCPA as possible. A VSWR of less than 1.5:1 across the working band
of frequencies is satisfactory. If the MCPA is operated into a filter, it maintains its distortion
characteristics outside the signal band even if VSWR is infinite. A parasitic signal of less than
one-watt incident on the output will not cause distortion at a higher level than the normal forward
distortion (i.e. -65 dBc).
4-4 Functional Description
The MCPA is a linear, feed-forward amplifier that operates in the frequency band from 851 MHz
to 869 MHz with an instantaneous bandwidth of less than 18 MHz. Instantaneous bandwidth is
the maximum frequency band that a set of two or more signals can occupy .The MCPA’s
instantaneous bandwidth is set automatically and does not require manual setup. The MCPA
provides a gain of 63 dB. Typical outputs for different carrier types are specified in Table 1-1.
Each MCPA module is self-contained and functionally independent of any other MCPA in a
system. The MCPAs are designed for parallel operation to achieve a high peak power output.
Each MCPA has an alarm board that monitors performance. If a failure or fault occurs, it is
transmitted to the subrack via the module rear connector. The sub-rack reports all alarms to the
host system.
Continuously comparing active paths with passive references, and correcting for small variations
through RF feedback maintains constant gain. All gain variations, for example those due to
temperature, are reduced to the passive reference variations.
Refer to Figure 4-1 for the amplifier functional block diagram. The amplifier consists of the
following major functional blocks:
• Preamplifier
• Main amplifier
• Error amplifier
• Alarm monitoring and control
• First and second loop control circuits
• Pilot tone generator
044-05177 Rev A4-1
Figure 4-1. Functional Block Diagram
4-4.1 Preamplifier
The RF carriers are applied to the input port of the MCPA, where they are fed to the preamplifier
stage. The preamplifier provides two stages of class-A mode-amplification. The output of the
preamplifier is then split into two paths, one to the main amplifier and one to the error amplifier.
4-4.2 Main and Error Amplifiers
The main amplifier provides a balance of gain and power and employs class AB amplification for
maximum efficiency. The error amplifier and feed forward loops correct signal distortion
introduced by non-linearity in the class AB main amplifier. The error amplifier operates in class A
mode. The RF signal from the preamp is coupled to an attenuator and phase shifter in the first
feed-forward loop where it is phase shifted by 180 degrees and amplified in the pre-main
amplifier. The output from the pre-main amplifier is fed to the class AB main amplifier. The signal
output from the main amplifier is sampled using a coupler, and the sample signal is combined
with the main input signal and input to the second feed-forward loop.
The error signal is attenuated, phase shifted 180 degrees, then fed to the error amplifier where it
is amplified to a level identical to the sample output from the main amplifier. The output from the
error amplifier is then coupled back and added to the output from the main amplifier. The control
loops continuously make adjustments to cancel out any distortion in the final output signals.
4-4.3 Alarm Monitoring and Control
The alarm logic controls the +5 Vdc bias voltage that shuts down the amplifier. During routine
operation, all normal variations are automatically compensated for by the feed-forward loop
control. However, when large variations occur beyond the adjustment range of the loop control, a
loop fault occurs. When this happens, an alarm indicator is illuminated on the front panel of the
sub-rack. The fault is transmitted back to an external summary module via the external alarm
interface connection on the front panel of the sub-rack.
4-2044-05177 Rev A
4-4.4 First and Second Loop Control Circuits
The primary function of the first loop is to amplify the carrier signals and isolate an error signal for
the second loop. The primary function of the second loop is to amplify the error signal to cancel
out spurious products developed in the main amplifier. The input signal is amplified by a
preamplifier and fed to a coupler and delay line. The signal from the coupler is fed to the
attenuator and phase shifter in the first loop. The first loop control section phase shifts the main
input signals by 180 degrees and constantly monitors the output for correct phase and gain.
The second loop control section obtains a sample of the distortion added to the output signals by
the main amplifiers. The signal is phase shifted 180 degrees, then fed to the error amplifier where
it is amplified to the same power level as the input sample. The signal is then coupled to the error
signal of the main amplifier output. The final output is monitored by the second loop and adjusted
to ensure that the signal distortion and intermodulation distortion (IMD) on the final output is
cancelled out.
4-4.5 Pilot Tone Generator
A pilot tone is an internally generated signal, who’s precise frequency, phase, and amplitude is
known. Passing through the amplifier, the pilot tone is distorted in the same way that signals are
distorted. To accomplish this, the pilot tone signal is injected into the first loop and then detected
at the feed-forward output of the second loop. The pilot tone is coupled off of the main amplifier,
thus creating a second pilot tone, attenuated and phase shifted 180 degrees to be used as the
reference. This second pilot tone is then amplified in the error amplifier and mixed with the
signals from the main signal path. Ideally, the two pilot tones, both amplified, should cancel each
other out. If they do not cancel each other out, as determined by an output detector, the
information is fed back to control the gain and phase of both the main and error amplifier paths
such that the output distortion is minimized.
4-5 Amplifier Module Cooling
The amplifier is cooled by forced air flowing over its heat sink, which is provided by external fans
mounted on the MCPA sub-rack. The fans are field replaceable. Each amplifier, when properly
cooled, maintains the amplifier within the specified operating temperature range. Six inches of
free space are required at both the front and rear panels of the sub-rack to allow adequate air
volume to circulate over the heat sinks.
4-6 Power Distribution
Primary DC power for the amplifier is provided by the host system. The amplifier module has a
DC/DC converter and voltage regulator that converts the +27 Vdc to +15 Vdc, +5 Vdc, and -5 Vdc
for internal use.
044-05177 Rev A4-3
4-7 Amplifier Alarms
The amplifier alarms are listed and described in Table 4-1. The front panel LEDs are described in
Chapter 3.
Table 4-1. G3H-851-80 Alarm States
Major Alarm Causes MCPA RF section to be disabled
Amplifier
Alarm
Output
Overpower
Automatic
Power
Control
(APC)
Input
Overdrive
High
Temperature
Definition
Disable the MCPA
immediately if the output
power is > +2 dB over rated
power.
Enabled if the output power
is > 51.7 dBm + 0.3 dB
Note: If the MCPA cannot
compensate the gain to
maintain compliance, the
Output Overpower or Input
Overdrive Faults will protect
the MCPA.
Disable the MCPA
immediately if the input RF
power is more than –5.7 dBm
Sensor temperature is >
+85° C
Amplifier
Mode
Major
Minor
(Yellow LED
display)
Major
Major
Minor Alarm Does not cause MCPA RF section to be disabled
Auto-RecoveryEvent/Fault Log
Input power decreases below
APC threshold (-11.2 dBm)
Amplifier auto-recovers when
the output power drops below
51.6 + 0.3 dB.
Input power decreases below
APC threshold (-11.2 dBm)
Amplifier auto-recovers when
the sensor temperature drops
to < +75° C.
Records output
overpower event after
system disabled
Records input overdrive
event, system disable
event, each auto
recovery event*
Records over
temperature event,
system disable event,
each auto recovery
event,
Disable the MCPA if the gain
of the MPCA is lower than
Low Gain
Reflected
Power
High
Voltage
Low
Voltage
4-4044-05177 Rev A
+50 dB for a duration of 1
minute with input power no
more than 33 dBm
Reverse RF output power is
> +48.3 dBm for a duration of
1-minute
Disable the MCPA
immediately if the supply DC
voltage > +30.5 Vdc
Disable the MCPA
immediately if the supply DC
voltage < +20.5 Vdc
Major
(Blinking
yellow LED
display)
Major
Major
Major
Continued next page
The amplifier attempts to
increase gain to more than +50
dB. After 10 unsuccessful
attempts, permanent shutdown.
MCPA waits 15 min before
initiating auto recovery.
Amplifier recovers if reverse
power is below +48.3 dBm
Auto-recovery when the supply
voltage drops to < +29.5 Vdc
Auto-recovery when the supply
voltage increases to > +24 Vdc
Records low gain
event, system disable
event, each auto
recovery event,
Records high reflected
power event, each auto
recovery event*
Records supply DC
fault event, system
disable event, each
auto recovery event*
Records low voltage
event, system disable
event, each auto
recovery event*
Loop
Fail
Loop convergence failMajor
Loop converges. Tries to auto
recover 10 times before
permanent shut down.
Records internal DC
fault event, system
disable event, each
auto recovery event*
Internal
DC
Fail
Device
Fail
Internal voltages failed or out
of range
One or more output power
devices fail
Minor
(no LED
display)
Major
Auto-recovery once the voltage
is within the range. After 10
attempts, if still unsuccessful,
permanent shutdown.
10 auto-recovery attempts; if
still unsuccessful, permanent
shutdown..
Records internal DC fail
event, system disable
event, each auto
recovery event*
Records device fault
event
044-05177 Rev A4-5
(Page intentionally left blank)
4-6044-05177 Rev A
Chapter 5
Maintenance
5-1 Introduction
This chapter contains periodic maintenance and performance test procedures for the
G3H-851-80 Multi-Carrier Power Amplifier (MCPA).
Do not break the seals on equipment under warranty or the warranty will be null and
Note
void. Do not return equipment for warranty or repair service until proper shipping
instructions are received from the factory.
5-2 Periodic Maintenance
Periodic maintenance requirements and the intervals at which the tasks should be performed are
listed in Table 5-1.
Test equipment required to test the amplifier is listed in Table 5-2. Equivalent test equipment may
be substituted for any item, keeping in mind that a thermistor type power meter is required.
Note
NomenclatureManufacturerModel
044-05177 Rev A 5-1
All RF test equipment required must be calibrated to 0.05 dB resolutions. Any
deviation from the nominal attenuation must be accounted for and factored into
all output readings.
Table 5-2. Test Equipment Required
Signal GeneratorAgilent8656B
20 dB Attenuator, 250 WattBird
20 dB Attenuator, 20 Watt (2 each)BirdTenuline
Spectrum AnalyzerAgilent8560E
Coax Directional CouplerAgilent778D
Power Meter / SensorAgilent437B / 8481A
Arbitrary Waveform GeneratorSonyAWG2021
Network AnalyzerAgilent8753C
* Any equipment substituted should have equivalent specifications.
5-4 Amplifier Performance Test
Performance testing should be conducted every 12 months to ensure that the amplifier system
meets the operational specifications listed in Table 5-3. Also verify system performance after any
amplifier module is replaced in the field.
The test equipment required to perform the testing is listed in Table 5-2, and the test setup is
shown in Figure 5-1 and Figure 5-2.
The frequencies used in this test are typical for an amplifier with a 18 MHz band from
Note
851 MHz to 869 MHz. Select evenly spaced F1, F2, F3, and F4 frequencies that
cover the instantaneous bandwidth of your system.
To check amplifier performance, proceed as follows:
WARNING
Do not apply any RF signals to the amplifier input until instructed to do
so.
Ensure that the correct amount of attenuation is used between the amplifier RF
CAUTION
connections and the test equipment to prevent overdrive of the amplifier or the
test equipment.
5-4.1 Amplifier Spurious Emissions Test:
1. Connect the test equipment as shown in Figure 5-1.
2. Configure the signal source to produce four frequencies evenly spaced across the
instantaneous bandwidth to be used for the amplifier under test.
3. Adjust the output of the signal source to excite the amplifier to its rated output.
4. Use the spectrum analyzer to measure the spurious emissions performance.
5. Record test data in Table 5-3. Verify that the data are within the specifications shown in
Table 1-1.
6. Reduce the output of the signal source to minimum.
7. Switch off the Main Power Switch on the amplifier under test.
5-2044-05177 Rev A
27 Vdc
G3H-851-80 PYTHON Multi-
Channel Power Amplifier
Gain = 63 dB
Output = 80 W = +49.03 dBm
HP 8648 A
Signal
Source
RF In
20 dB
Directiona l
Coupler
RF Out
20 dB
Directional
Coupler
Power Meter
Head 8482A
Sensor
30 dB
Attn
250 W
High Pwr
30 dB
Attn
20 W
20 dB
Attn
HP 437B
Sensor
Head 8482A
HP 8560 E
Power
Meter
Spectrum
Analyzer
INPUT
TEST
CONFIGURATION
A
04-0262B-A
* Example. Ensure that sufficient
attenuation is present between the
amplifier output and your test equipment
to avoid overdrive or damage. Refer to
test equipment specifications.
Figure 5-1. Amplifier Test Setup Diagram – Configuration A
5-4.2 Gain Test:
1. Disconnect:
a. Spectrum analyzer
b. Signal source.
c. Power Meter and Sensor Head.
2. Connect the network analyzer as shown in Figure 5-2.
3. Set network analyzer as follows:
a. Power output to -11 dBm max.
b. Frequency start to 851 MHz.
c. Frequency stop to 869 MHz.
d. Normalize the network analyzer for gain and return loss.
4. Switch on the amplifier under test, and ensure that the STATUS switch is in the center
position.
5. Check the amplifier gain across the band from 851 MHz to 869 MHz. Gain should be as
specified in Table 1-1. Record test data in Table 5-3.
+1.3
dBm*
044-05177 Rev A 5-3
27 Vdc
G3H-851-80 PYTHON Multi-
Channel Power Amplifier
Gain = 63 dB
Output = 80 W = +49.03 dBm
RF Out
RF In
250 W
40 dB
Attn
HP 8753 D
Network
Analyzer
CONFIGURATION
04-0263B-A
Figure 5-2. Amplifier Test Setup – Configuration B
5-4.3 Input Return Loss:
1. Retain the test configuration shown in Figure 5-2.
2. Read and record the S
Table 5-3.
3. Switch off the amplifier under test.
4. Disconnect the test equipment.
return loss measurement on network analyzer. Record test data in
11
TEST
B
PORT 1
PORT 2
+1.3
dBm*
* Example. Ensure that sufficient
attenuation is present between the
amplifier output and your test
equipment to avoid overdrive or
damage. Refer to test equipmen t
specifications.
5-4044-05177 Rev A
5-4.4 Test Data Sheet
Record the amplifier’s performance test data below.
Vcc = 27 Vdc
PO = See Table 1-1
851 – 869 MHz Band
PO = See Table 1-1
851 – 869 MHz Band
Vcc = 27 Vdc
PO = See Table 1-1
851 – 869 MHz Band
-63 dBc
±0.5 dB
B
--1166 ddB
5-5 Return For Service Procedures
When returning products to Powerwave, the following procedures will ensure optimum response.
5-5.1 Obtaining An RMA
A Return Material Authorization (RMA) number must be obtained prior to returning equipment to
the factory for service. Please contact our Repair Department at (714) 466-1000 to obtain this
number, or FAX your request to (714) 466-5800. Failure to obtain this RMA number may result in
delays in receiving repair service.
5-5.2 Repackaging For Shipment
To ensure safe shipment of the amplifier, it is recommended that the original package designed
for shipping the amplifier be reused. If it is not available, contact Powerwave’s Customer Service
Department for packing materials.
044-05177 Rev A 5-5
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5-6044-05177 Rev A
Abbreviations and Acronyms
Below is a list of the abbreviations and acronyms used in the industry.
Appendix A
Abbreviation/
Acronym
ACLRAdjacent Channel Leakage Power Ratio
ACPAdjacent Channel Power
A/DAnalog-to-Digital Conversion
ADC{Analog-to-Digital Converter
AMAmplitude Modulation
AMPSAdvanced Mobile Phone System
ANSIAmerican National Standards Institute
APCAutomatic Power Control
APTTAnalog Push To Talk
ASGApplications Support Group
ASICApplication Specific Integrated Circuit
ATEAutomatic (Automated) Test Equipment
ATPAcceptance Test Procedure
ATTENAttenuator
BERBeyond Economical Repair
BOMBill Of Materials
BPFBand Pass Filter
BSBase Station
BTSBase Transceiver Station (System)
BWBandWidth
°C
CADComputer Aided Design
CCA{Circuit Card Assembly
CCWCounter ClockWise
CDMACode Division Multiple Access
CDPDCellular Digital Packet Data
CTRLControl
CW{ClockWise
Definition
{Automatic Data Collection
Degrees Celsius
{Continuous Wave
044-05177 Rev AA-1
Abbreviation/
Acronym
Definition
dBdeciBels
dBcReferenced to a carrier level
dBmReference to one milliwatt
dBwReference to one watt
DINDeutsches Insitut für Normung eV
DLNADuplexer Low Noise Amplifier
DPTTDigital Push To Talk
DQPSKDifferential Quadrature Phase Shift Keyed
DSPDigital Signal Processing
DUTDevice Under Test
ECDEstimated Completion Date
ECMElectronic Counter Measure
EDGEEnhanced Data for GSM Evolution
EEPROMElectrically-Erasable Programmable Read-Only Memory
EIAElectronic Industries Association
EMCElectroMagnetic Compatibility
EMIElectroMagnetic Interference
EPROM{Electrically Programmable Read-Only Memory
{Erasable Programmable Read-Only Memory
ESDElectroStatic Discharge
ESGElectronic Signal Generator
ETDMAExtended Time Division Multiple Access
ETSIEuropean Telecommunications Standard Institute
EUTEquipment Under Test
FARFailure Analysis Report
FCCFederal Communications Commission
FDMAFrequency Division Multiple Access
FETField Effect Transistor
FHMAFrequency Hopping Multiple Access
FMFrequency Modulation
FRUField Replaceable Unit
FSKFrequency Shift Key modulation
GHzGigahertz
GMSKGaussian Minimum Shift Keying
GOLAYSee GSC
GSCGolay Sequential Code
A-2044-05177 Rev A
Abbreviation/
Acronym
Definition
GSMGlobal System for Mobile Communications
HPFHigh Pass Filter
HWHardware
HzHertz
IAWIn Accordance With
ICIntegrated Circuit
IMDInterModulation Distortion
IRLInput Return Loss
IS-54Interim Standard 54 for TDMA
IS-95Interim Standard 95 for CDMA
ISDNIntegrated Services Digital Network
ISMIndustrial, Scientific and Medical unlicensed frequency bands
ISO{International Organization for Standardization
{ISOlator
kHzKilohertz
LDALinear Discrete Amplifier (Class A or AB)
LGLLower Guardband Limit
LMRLand Mobile Radio
LMSLand Mobile Systems
LNALow Noise Amplifier
LOLocal Oscillator
LPALinear Power Amplifier
LPFLow Pass Filter
LSLLower Specification Limit
LVDLow Voltage Disconnect
MCMultiChannel
MCAMultiChannel Amplifier
MCPA{MultiCarrier Power Amplifier
{MultiChannel Power Amplifier
MCRMultiChannel Rack
MFRM{Multiple Frequency Radio Mobile
{Multifunction Frequency Radio Modulation
MHzMegahertz
MSOMaster Switch Office
MTBFMean Time Between Failures
MTSOMaster Telephone Switch Office
044-05177 Rev AA-3
Abbreviation/
Acronym
Definition
MUMeasurement Uncertainty
M&TEMeasuring and Test Equipment
NAMPSNarrow Analog Mobile Phone System
NIOSHNational Institute for Occupational Safety and Health
NISTNational Institute for Standards and Technology
NMTNordic Mobile Telephone
NVMNonVolatile Memory
OEMOriginal Equipment Manufacturer
OFDMOrthogonal Frequency Division Multiplexing
OMSOperational Method Sheet
OOBOut Of Box
O/POutput
OSHAOccupational Safety and Health Administration
PAPower Amplifier
PAFPowerwave Amplifier Frame
PARPeak to Average Ration
PCBPrinted Circuit Board
PCMCIAPersonal Computer Memory Card International Association
PCNPersonal Communications Network
PCS{Personal Communications Services
{Personal Communication System(s)
PDAPersonal Digital Assistant
PEPPeak Envelope Power
PFPicoFarads
PHSPersonal Handyphone System – Japan
PLCProduct Life Cycle
PLLPhase Locked Loop
PM{Phase Modulation
{Preventive Maintenance
PMRPeak to Minimum Ratio
POPurchase Order
PPMParts Per Million
PSC{PCS Single Channel
{Product Serialization Code
PSTNPublic Switched Telephone Network
PTIPowerwave Technologies, Inc.
A-4044-05177 Rev A
Abbreviation/
Acronym
Definition
PTTPush To Talk
PWAVPowerwave
QAQuality Assurance
QAMQuadrature Amplitude Modulation
RBWResolution Band Width
RFRadio Frequency
RFIRadio Frequency Interference
RFQRequest For Quotation
RFSRF Solutions
RFSURF Switching Unit
RGOReturn Goods Order
RHRelative Humidity
RLReturn Loss
RMA{Rack-Mounted Amplifier
{Return Material Authorization
RMPReliability Monitoring Plan (Procedure)
RMSRoot Mean Square
RSSRoot Sum Square
RxReceive, Receiver
SCHPASingle-Channel High Power Amplifier
SCPASingle Channel Power Amplifier
SIMSystem Interface Module
SMASubMiniature Type A (coaxial connector)
SMTSurface Mount Technology
SNSerial Number
SOSystem Outage
SOESequence of Events
SWSoftWare
TBCTo Be Confirmed
TBDTo Be Determined (To Be Defined)
TCXOTemperature Controlled crystal Oscillator
TD{Temperature Drift
{Temporary Deviation
TDMATime Division Multiple Access
TRUTransmit Receive Unit
044-05177 Rev AA-5
Abbreviation/
Acronym
Definition
TRXTransceiver (Transmit / Receiver) Unit
TxTransmit, Transmitter
UAIUse As Is
UARTUniversal Asynchronous Receiver Transmitter
UCLUpper Control Limit
UCLRUpper Control Limit for Range
UGLUpper Guardband Limit
ULUnderwriters Laboratories
UMTSUniversal Mobile Telecommunications System
UNLUnit Nominal Level
URGUnit Reference Gain
USLUpper Specification Limit
UUTUnit Under Test
VADJVoltage ADJust (signal name frequently found on schematic or block
diagrams)
VBWVideo Band Width
VCOVoltage Controlled Oscillator
VFWDVoltage ForWarD (signal name frequently found on schematic or block
diagrams)
VREFLVoltage REFLected (signal name frequently found on schematic or block