HP 8711C User Manual

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Making Measurements
Measuring Devices with Your Network Analyzer
When to Use Attenuation and Amplification
in a Measurement Setup
When to Use
Attenuation
l For accurate measurements, use external attenuation to limit the power at
the RF IN port to + 10 dBm (for narrowband measurements) or + 16 dBm
(for broadband measurements).
CAUTION
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
4125 Vdc.
l Use attenuation on the RF IN port to reduce mismatch errors. See
“Reducing Mismatch Errors” in Chapter 5 for more information.
l In an AM delay measurement (Options 1DA and 1DB only), use attenuation
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.
When to Use
Amplification
l For accurate measurements, ampliEcation may be needed on the analyzer’s
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
SpeciEcations” in Chapter 10 to determine the maximum speciEed output
power of your analyzer.
l In an AM delay measurement (Options 1DA and 1DB only), use
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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HP 8711C Specifications

General

Brand	HP
Model	8711C
Category	Measuring Instruments
Language	English