HP 8447D Operation And Service Manual page 31

Figure 7
NOTE:
Distortion and Reverse Isolation Test Setup
Procedure:
1 To check distortion, connect the equipment as shown in Figure 7. Set the sweep oscil-
lator for a fixed, 400 MHz CW signal.
For the HP 8447F option H64 low frequency preamp, set the frequency to 10 MHz.
2 Set the spectrum analyzer input attenuator as shown below. Adjust the controls to dis-
play 400 through 1200 MHz.
For the HP 8447F option H64 low frequency preamp, set the controls to display 10
through 30 MHz.
The signal into the spectrum analyzer input mixer must be low enough to eliminate
harmonic distortion in the spectrum analyzer.
3 Set the sweep oscillator output level for the following signal levels out of the amplifier
(read on the spectrum analyzer).
HP 8447E:
HP 8447F Power Amp:
HP 8447F H64 Low freq preamp:
4 Note the level of the second harmonic at 800 MHz and the third harmonic at 1200 MHz.
DRAFT
Operation and Service Manual
Performance Tests Procedures
Spectrum Analyzer
Signal Level
Input Attenuation
+
8 dBm
+
8 dBm
+
10 dBm
50 dB
50 dB
50 dB
29