User's Manual

G3S-800-140 Installation & Service Manual
044-05095 Rev. A 5-2 February 2001
Table 5-2 Test Equipment Required
Nomenclature Manufacturer Model
Signal Generator RDL IMD-801D-03A
30 dB Attenuator, 500 Watt Weinschel Corp. 53-30-34
20 dB Attenuator, 20 Watt
(2 each)
Tenuline
Spectrum Analyzer H.P. 8560E
Coax Directional Coupler H.P. 778D
Power Meter/Sensor H.P. 437B/8481A
Network Analyzer H.P. 8753C
Current Probe
5-4 Cleaning Air Inlets/Outlets
The air inlets and outlets should be cleaned every 30 days. If the equipment is operated in a se-
vere dust environment, they should be cleaned more often as necessary. Turn off DC power
source before removing fans. If dust and dirt are allowed to accumulate, the cooling efficiency
may be diminished. Using either compressed air or a brush with soft bristles, loosen and remove
accumulated dust and dirt from the air inlet panels.
5-5 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.
NOTE
The frequencies used in this test are typical for an amplifier with a 25 MHz band from
869 MHz to 894 MHz. Select evenly spaced F1, F2, F3, and F4 frequencies that cover the
instantaneous bandwidth of your system.
5-5.1 Amplifier System Performance Test
This test is applicable to the G3S-800-140 amplifier modules. To perform the test, proceed as
follows:
1. Connect test equipment to the amplifier as shown in figure 5-1.
NOTE
Do not apply any RF signals at this time.
Turn on signal generator and set frequency F1 to 880 MHz, F2 to 883 MHz, F3 to 886 MHz,
and F4 to 889 MHz. Adjust each signal generator output so that the sum power output from
all four signal generators equals -6 dBm at the input.