Atec Agilent-8563E - Manual (Page 59)

Performance Tests ESG Family Signal Generators
2. Internal AM Accuracy and Distortion
4-10 Calibration Guide
2. Internal AM Accuracy and Distortion
These automated tests verify the AM accuracy and distortion specifications.
For frequencies at or below 1300 MHz, accuracy is verified directly with a measuring
receiver, and distortion is verified by measuring the demodulated output from the
measuring receiver with an audio analyzer. The audio analyzer provides a more accurate
verification with better resolution than using the measuring receiver alone.
For frequencies above 1300 MHz, the RF output from the signal generator is mixed with
the output from another signal generator (local oscillator) to produce a suitable input
frequency for the measuring receiver.
For a frequency of 4 GHz, verification is accomplished by covering two different frequency
spans through the use of two mixers.
Recommended Equipment
• HP/Agilent 8902A Measuring Receiver Option 010
• HP/Agilent 8903B Audio Analyzer
• HP/Agilent 8663A Signal Generator
• MD/MDC-174 Mixer (1 to 2800 MHz)
• MD/MDC-164 Mixer (0.5 to 9 GHz)
Equipment Setups
Figure 4-7 Accuracy and Distortion for AM
≤
1300 MHz Test Setup