Attenuation And Amplification In A Measurement Setup - HP 8712ET User Manual

Measurement
Transmission
Reflection
Power
Conversion Loss
CAUTION
The following table shows the correlation between different types of
measurements, input channels, and signals.
Detection Mode
Narrowband
Narrowband
Broadband
Broadband
Attenuation and Amplification in a
Measurement Setup
The measurement setup that you use may require attenuation or
amplification. The following sections describe when to use them.
When to Use Attenuation
• For accurate measurements, use external attenuation to limit the
power at the RF IN port to +10 dBm (for narrowband-detection
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 +20 dBm or
±30 Vdc.
• Use attenuation on the RF IN port to reduce mismatch errors. See
"Reducing Mismatch Errors" on page 5-15
ET User's Guide
Measuring Devices with Your Network Analyzer
Input Channels
B/R
A/R
B*
B*/R*
for more information.
Making Measurements
Input Signals
transmitted/incident
reflected/incident
transmitted
transmitted/incident
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