332 Chapter 2
Performance Verification Tests
39. Residual Responses
been checked for the model and frequency ranges below.
6. Press Single and wait for a new sweep to finish. Look for any residual
responses at or above the display line.
If a residual is suspected, press Single again. A residual response
will persist on successive sweeps, but a noise peak will not. Record
the frequency and amplitude of any residual responses above the
display line in Table 2-91.
7. Press FREQUENCY, Center Freq, ↑.
If there are any residuals at or near the frequency specification
limits (1 MHz, 1.5 GHz, 3 GHz, or 6.7 GHz), it is recommended that
a known frequency source be used as a frequency marker. This will
ensure that testing is done at or below the specification limits.
8. Record the highest residual from Table 2-91 as Test Record entry 1
in the performance verification test record. If no residuals are found,
then record “N/A” in the performance verification test record.
Agilent Model Frequency Range
E4401B and E4411B 1 MHz to 1.5 GHz
E4402B and E4403B 1 MHz to 3.0 GHz
E4404B, E4405B, E4407B, and E4408B 1 MHz to 6.7 GHz
Table 2-91 Residual Responses Worksheet
Frequency
(MHz)
Amplitude
(dBm or dBmV)