Analog Devices Linear Technology DC2483A-B Demo Manual page 3

DEMO MANUAL
DC2483A-A/DC2483A-B
NOTES ON TEST EQUIPMENT SETUP
• High performance signal generators with low harmonic
outputs should be used for 2-tone measurements. Oth-
erwise, lowpass filters at the signal generator outputs
should be used to suppress harmonics.
• High quality combiners should be used to present a
broadband 50Ω termination on all ports as well as
provide good port-to-port isolation. Adding attenua-
tor pads further improves source isolation and helps
prevent the signal generators from producing inter-
modulation products.
2
• Spectrum analyzers can produce significant internal
distortion products if they are overdriven. Generally,
spectrum analyzers are designed to operate at their
best with about –30dBm to –40dBm at their input. The
spectrum analyzer's input attenuation setting should be
used to avoid saturating the instrument.
• Set the spectrum analyzer's input attenuation depend-
ing on the spectrum analyzer used.
• Before performing measurements on the DUT, the sys-
tem performance should be evaluated to ensure that
a clean input signal is obtained and that the spectrum
analyzer's internal distortion is minimized.
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