HP 8591C User Manual page 180

Channel Measurements Menu Map and Softkey Descriptions
Channel Measurements Softkey Function Descriptions
34: 37 NOV 23.
15: 1993
A
Figure 5-8. System Frequency Response
peak-to-valley values using the marker. For ease of use, it is recommended
to press (SGLSWP) hardkey before using these keys.
display the frequency response trace.
8. The results can now be stored to internal memory, memory card, or
printed.
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