Performance Tests - HP 8447D Operation And Service Manual

Model 8447D/E/F
Page 9
PERFORMANCE TESTS
55. Gain Flatness, Mean Gain, and Gain Compression
Specifications
8447D
PREAMP
8447E
POWER AMP
8447F
PRE AMP POWER AMP
Gain Flatness Across Full
Frequency Range
±1.5 dB
+ 1.5 dB ±1.5 dB ±1.5 dB
Mean Gain (20°C - 30°C 26 dB Minimum
22 dB ±1.5 dB 26 dB Minimum 22 dB ±1.5 dB
Output Power for 1 dB
Gain Compression
+ 15 dBm +15 dBm
Description:
Amplifier gain is measured at the maximum and minimum points of its frequency response (see
Figures 1 and 2). The difference between highest measured gain and lowest measured gain should be
less than 3 dB (gain flatness). Half of the sum of highest gain and lowest gain is measured mean gain
and should be within 1.5 dB of specified gain. Compression is checked by measuring gain at the
specified 1 dB compression point and comparing it to gain measured below compression.
Equipment:
Genera tor/Sweeper . .
Sweep Oscillator . . .
RMS Voltmeter . . .
Power Meter ....
BNC Cable Assembly (2)
BNC Tee.
50 ohm Termination .
Adapter ......
Adapter ..
Adapter ......
20 dB Attenuator . .
10 dB Attenuator . .
. . HP 8601A
HP 8620A/8621A
. . . HP3400A
. HP 432A/478A
. . HP 10503A
. . UG-274B/U
. . HP 11593A
. . UG-349A/U
. . UG-201A/U
. HP 1250-0080
. . HP 8491B-20
. . HP 8491B-10
Figure 3. Gain Flatness, Mean Gain, and Gain Compression Test Setup: 10 MHz to 1.3 GHz