9-3
Supplemental Verification Tests
CW Frequency Accuracy Supplemental Verification Test
CW Frequency Accuracy Supplemental Verification Test
Connect the Test Equipment
Figure 9-1. Frequency Accuracy Equipment Setup
Configure the Frequency Counter
• For frequencies < 10 MHz:
Use Input 2; press
1 MΩ.
• For frequencies > 10 MHz and < 500 MHz:
Use Input 2; press
50Ω.
• For frequencies > 500 MHz:
Use Input 1; press
AUTO.
Configure the 8648
1. Set the amplitude; press AMPLITUDE, 4, dB(m).
2. Turn the RF output on; press
RF ON/OFF.
Measure Frequency Accuracy
1. Set the frequencies shown in the test record.
2. For each data point, measure the carrier frequency with FM turned off, press
MOD ON/OFF.
3. Record the measured frequency in the test record.
4. Compute the error (difference) and compare it to the corresponding limits.
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