Powerwave Technologies G3L-850-135, Руководство по обслуживанию и установке

Страница: 33 / 48

044-05117
7. Switch off the Main Power Switch on the amplifier under test.
G3L-850-135 PYTHON Multi-
Channel Power Amplifier
Gain = 63 dB
Output = 135 W = +51.3 dBm
27 Vdc
RF Out
RF In
20 dB
Directional
Coupler
30 dB
Attn
250 W
High Pwr
04-0262B-A
Sensor
Head 8482A
30 dB
Attn
20 W
20 dB
Directional
Coupler
Sensor
Head 8482A
Power Meter
INPUT
HP 8560 E
+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 equipment specifications.
+1.3
dBm*
Spectrum
Analyzer
HP 8648 A
HP 437B
Signal
Source
Power
Meter
TEST
CONFIGURATION
A
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 869 MHz.
c. Frequency stop to 894 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 869 MHz to 894 MHz. Gain should be as
specified in Table 1-2. Record test data in Table 5-3.
Installation and Service Manual - G3L-850-135 Multi-Carrier Power Amplifier 5-3