Powerwave Technologies 5JS0047 Tornado, Model NTGY71AA User Manual 5

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Document ID	125867
Application ID	FAhUIsCgxaR6Blb4FvmGog==
Document Description	sect 5
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Permanent Confidential	No
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Document Type	User Manual
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Filesize	2.63kB (32894 bits)
Date Submitted	2000-11-16 00:00:00
Date Available	2001-03-20 00:00:00
Creation Date	2000-10-30 10:15:21
Producing Software	Acrobat PDFWriter 4.0 for Windows
Document Lastmod	0000-00-00 00:00:00
Document Title	5.PDF
Document Creator	Microsoft Word
Document Author:	Judy

Section
MAINTENANCE
5-1. INTRODUCTION
This section contains periodic maintenance and performance test procedures for the multichannel
power amplifier. It also contains a list of test equipment required to perform the identified tasks.
NOTE
Check your sales order and equipment warranty
before attempting to service or repair the unit. Do not
break the seals on equipment under warranty or the
warranty will be null and 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 are listed in Table 5-1. Table 5-1 also lists the intervals at
which the tasks should be performed.
Table 5-1. Periodic Maintenance
TASK
Inspection
Cables and Connectors
INTERVAL
ACTION
12 Months
Performance Tests
12 Months
Inspect signal and power cables for frayed
insulation. Check RF connectors to be
sure that they are tight.
Perform annual test per paragraph 5-5.
5-3. TEST EQUIPMENT REQUIRED FOR TEST
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
All RF test equipment must be calibrated to 0.05
dB resolution. Any deviation from the nominal
attenuation must be accounted for and factored
into all output readings.
044-05080 Rev. A
5-1
Table 5-2. Test Equipment Required
MENCLATURE
Signal Generator
30 dB Attenuator, 250 Watt
Spectrum Analyzer
Coax Directional Coupler
Power Meter / Sensor
Network Analyzer
Current Probe
Source Diskette
MANUFACTURER
Agilent (H.P.)
Tenuline
H.P.
H.P.
H.P.
H.P.
MODEL
ESG4433B
8562E
778D
437B / 8481A
8753D
Powerwave
5-4. 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.
5-4.1. AMPLIFIER PERFORMANCE TEST.
To perform the test, proceed as follows:
1.
Connect test equipment as shown in figure 5-1.
NOTE
Do not apply any RF signals at this time.
AMPLIFIER SPURIOUS EMISSIONS TEST:
2.
Load the MFRM waveform on the ESG (signal generator). Apply this signal through a driver
amplifier to the MCPA so that the RF signal going into the MCPA is approximately -1.5
dBm (adjust the input RF signal level to get 48.5 dBm output power). Measure spurious
emissions. Verify that it is within specification.
GAIN TEST:
3.
Set input power level to power amplifier at –1.5 dBm (869, 881, and 894 MHz).
4.
Measure the output power in dBm.
5.
Subtract input power (in dBm) from output power (in dBm) to get gain.
6.
Check the amplifier gain across the band from 869 MHz to 894 MHz. Gain should be 50 ±2
dB. Record test data in table 5-3.
INPUT RETURN LOSS TEST:
7.
Read and record the S11 return loss measurement on network analyzer. Record test data in
table 5-3.
044-05080 Rev. A
5-2
Figure 5-1. NTGY71AA Amplifier Test Setup Diagram
044-05080 Rev. A
5-3
Table 5-3. Multichannel Power Amplifier NTGY71AA Test Data Sheet
Tested By: ______________________
Serial No: ____________________
Pass/Fail: ______________________
Date: ________________________
70W MCPA Test
Test Conditions: Load and source impedance: 50 ohms, VSWR < 1.2:1
Supply voltage: (+26) Vdc ± 0.1 Vdc (unless otherwise noted).
Network Analyzer Span: 25 MHz
Marker #1 = 869 MHz, #2 = 881 MHz, #3 = 894 MHz
TEST
CONDITION
MIN
MAX
1.00
NETWORK ANALYZER
1.01
Gain
1.02
Gain Flatness
1.03
Input Return Loss, worst case In band
1.04
Output Return Loss, worst case In band
2.00
CDMA TESTS
3 CDMA TONES: @ 70W out
•
49.5dB
50.5dB
0 dB
±0.2 dB/
1.25 MHz
-14 dB
-14 dB
Spec. Ana. With 10 MHz Res. BW
2.01
∆ @ +1.5MHz
-61 dBc
2.02
∆ @ –1.5MHz
-61 dBc
2.03
Current @ 70 W (48.5 dBm) out
23.4A
3.00
RMS Power Detection
3.01
RMS reading in Watts @ Pout = 48.5 dBm
-0.5dB
+0.5dB
3.02
RMS reading in Watts @ Pout = 43.5 dBm
-0.5dB
+0.5dB
4.00
ALARM TESTS
4.01
Excessive DC Voltage (>27 V)
Check
4.02
Check
4.03
Verify Over Power Alarm
(>51 dBm for >3 sec)
FWD PWR Voltage (4.26V @ 48.5 dBm)
4.04
REV PWR Voltage (4.26V @ 48.5 dBm)
Check
5.00
FIRMWARE VERSION
044-05080 Rev. A
Check
2.05
5-4
FREQUENCY (MHz)
869
881
894
5-5. FIELD REPLACEMENT OF THE MODULE
The NTGY71AA multichannel power amplifier module can be replaced in the field on site by a
qualified technician with experience maintaining RF power amplifiers and similar equipment.
To replace a power amplifier module, proceed as follows:
1.
Turn off 26 Vdc power to that specific module.
2.
Disconnect the two RF cables and connectors P1 through P5.
3.
Remove 13 screws that secure amplifier module to heat sink.
4.
Carefully remove amplifier module from heat sink.
5.
Add Thermstrate thermal interface pad to surface of replacement amplifier
which mates with heatsink.
6.
044-05080 Rev. A
Install replacement in reverse order of steps 1 through 4 above.
5-5

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Page Count                      : 5
Creator                         : Microsoft Word
Create Date                     : 2000:10:30 10:15:21
Title                           : 5.PDF
Author                          : Judy
Producer                        : Acrobat PDFWriter 4.0 for Windows

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