20
DRAFT
Operation and Service Manual
Performance Tests Procedures
Figure 3
Gain Test Setup: 10 MHz to 1.3 GHz
Procedure:
1
To measure gain flatness and mean gain, connect the equipment as shown in Figure 3.
Set the sweep oscillator for a 1.3 GHz, leveled, CW signal. Set the signal level for
−
10
dBm out of the 10 dB attenuator (read on the power meter).
2
Disconnect the power meter from the sweep oscillator and 10 dB attenuator. Connect
the sweep oscillator, through the 10 dB and 20 dB attenuators, to the amplifier
INPUT. Connect the power meter to the amplifier OUTPUT. Note the power meter
reading. Use this reading to calculate amplifier gain.
Example:
−
7 dBm (read in step 2) minus
−
10 dBm (set in step 1) plus 20 dB (read from attenua-
tor) = 23 dB (gain)
NOTE:
Use the attenuation printed on the 20 dB attenuator. This may vary slightly, depending
upon the frequency.
3
Tune the sweep oscillator for a maximum indication on the power meter at 1150
±
100
MHz. Disconnect the oscillator and the power meter from the amplifier. Connect the
power meter, through the 10 dB attenuator, to the oscillator. Set the oscillator signal
level for
−
10 dBm out of the attenuator.
4
Disconnect the power meter from the sweep oscillator and 10 dB attenuator. Connect
the oscillator, through the 10 dB and 20 dB attenuators, to the amplifier INPUT. Con-
Gain at 1300 MHz:______________________dB
Содержание 8447D
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Страница 10: ...8 DRAFT Operation and Service Manual General Information Figure 1 Typical Preamplifier Performance Curves ...
Страница 11: ...DRAFT 9 Operation and Service Manual General Information Figure 2 Typical Power Amplifier Performance Curves ...
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Страница 54: ...52 DRAFT Operation and Service Manual Parts and Service Figure 13 Internal Views ...
Страница 58: ...56 DRAFT Operation and Service Manual Parts and Service Figure 18 Amplifier and Power Supply Circuits ...