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Chapter 2 97
Functional Tests
What You Will Find in This Chapter
Functional Tests
— Frequency Readout Accuracy on page 139
— Marker Count Accuracy on page 141
— Frequency Response (Flatness) on page 142
— Reference Level Accuracy on page 146
— Resolution Bandwidth Switching Uncertainty on page 151
— Scale Fidelity on page 154
— Second Harmonic Spurious Responses on page 157
— Tracking Generator Level Flatness: Models E4401B and E4411B, Options 1DN and
1DQ on page 160
— Tracking Generator Level Flatness: E4402B, E4403B, E4404B, E4405B, E4407B and
E4408B, Option 1DN on page 163
Each functional test includes:
• Test limits (pass/fail criteria)
• A description of the test
• The equipment required for the test
• A figure showing how to connect the equipment
• Step-by-step instructions
• One or more tables in which to record the measurement results
Before Performing a Functional Test
1. Ensure that you have the proper test equipment.
2. Switch on the unit under test (UUT) and let it warm up (in accordance with warm-up
requirements in the instrument specifications).
3. Allow sufficient warm-up time for the required test equipment (refer to individual
instrument documentation for warm-up specifications).
4. Ensure that the analyzer’s frequency reference is set to Internal:
a. Press the
System, Reference keys.
b. If the
Freq Ref softkey does not have Int underlined, press the Freq Ref softkey until it
is underlined.
5. Following instrument warm-up, perform the auto align routine:
Press
System, Alignments, Align All Now.
NOTE Functional test accuracy depends on the precision of the test equipment used.
Ensure that all of the test equipment is calibrated before running a functional
test.