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5820A
Service Manual
1. Program the Calibrator Mainframe for an output of 5.5 V @ 600 MHz.
2. Set the Spectrum Analyzer to the parameters listed below:
3. You need to adjust the wave until the spur is at a minimum. To do this, slowly rotate
153 MHz
Spur
3-66. Adjusting the Leveled Sine Wave Harmonics
The following procedure adjusts the harmonics for the leveled sine wave function.
This procedure should only be used for adjusting the leveled sine wave
harmonics. Do not use this procedure as a verification test. The
specifications in this procedure are not valid for verification.
1. Set the Spectrum Analyzer to the parameters listed below:
3-60
Spectrum Analyzer Setup
Start Frequency
Stop Frequency
Resolution Bandwidth
Video Bandwidth
Reference Level
The Spectrum Analyzer will display a spur at 153 MHz. Refer to Figure 3-10 to
identify the spur.
R1 (shown in Figure 3-10) counterclockwise until the spur is at a minimum. As you
adjust it, the spur will move down the waveform, towards the right. As soon as the
spur is minimized, stop rotating R1. If you rotate it too far, the spur will reappear.
Once you have turned R1 to the point at which the spur is at a minimum, the signal
is balanced between the VCOs, and you have completed the adjustment.
Figure 3-10. Adjusting the Leveled Sine Wave Balance
Spectrum Analyzer Setup
Start Frequency
Stop Frequency
10 MHz
800 MHz
30 kHz
3 kHz
20 dBm
R1
Note
50 MHz
500 MHz
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