When To Use Attenuation And Amplification In A Measurement Setup - HP 8711C User Manual

When to Use
Attenuation
C A U T I O N
When to Use
Amplification
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For accurate measurements, use external attenuation to limit the power at
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the RF IN port to + 10 dBm (for narrowband measurements) or + 16 dBm
(for broadband measurements).
Always
use attenuation on the TRANSMISSION RF IN port if your test
device's output power exceeds the receiver damage limit of +23 dBm or
Vdc.
Use attenuation on the RF IN port to reduce mismatch errors. See
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"Reducing Mismatch Errors" in Chapter 5 for more information.
In an AM delay measurement (Options 1DA and 1DB only), use attenuation
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directly before the DUT if the device's input power must be less than
the - 10 dBm minimum specified detector level. (If you reduce the input
power to the DUT by lowering the analyzer's source power, the reference
detector, X, will be below its speciEed range.)
Use attenuation directly after the DUT if the device's output power is
greater than the + 13 dBm maximum speciEed detector level.
For accurate measurements, ampliEcation may be needed on the analyzer's
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RF OUT port. Use ampliEcation when your test device requires input
power that exceeds the analyzer's maximum speciEed output power.
The maximum speciEed output power is highly dependent upon the
model and option conEguration of your analyzer as well as the frequency
range of your test setup. It ranges from +4 to + 16 dBm. See "Source
power of your analyzer.
In an AM delay measurement (Options 1DA and 1DB only), use
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amplification directly before the DUT if the device's input power must be
greater than the maximum power available at the power splitter output.
Use ampliEcation directly after the DUT it the device's output power is less
than the - 10 dBm minimum speciEed level needed by the test detector (Y).
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