HP 8447D Operation And Service Manual page 23

Figure 4
nect the power meter to the amplifier OUTPUT. Calculate and record the amplifier gain
as in step 2.
5 Measure, calculate and record the amplifier gain at the following frequencies. Use the
procedures outlined in steps 3 and 4.
Frequency
800 ±200 MHz (tune for minimum):
350 ±100 MHz (tune for minimum):
6 Disconnect the sweep oscillator and the power meter from the amplifier. Connect the
equipment as shown in Figure 4. Set the generator/sweeper for a 10 MHz, CW signal.
Set the signal level for −40 dB (read on the voltmeter).
7 Disconnect the voltmeter from the generator/sweeper. Connect the generator/sweeper
to the amplifier INPUT. Connect the voltmeter, with the 50 Ω termination, to the am-
plifier OUTPUT. Note the voltmeter reading. Use this reading to calculate the amplifier
gain.
Example:
−18.5 dB (read in step 7) minus −40 dB (set in step 6) = 21.5 dB (gain)
Flatness and Mean Gain Test Setup: 100 kHz to 10 MHz
8 Measure, calculate and record amplifier gain at the following frequencies. Use the pro-
cedures outlined above.
DRAFT
Gain at 1150 MHz________________________dB
Gain at 1300 MHz:______________________dB
Operation and Service Manual
Performance Tests Procedures
Gain
_______________dB
_______________dB
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