R3131 Spectrum Analyzer Operation Manual
Cautions on Using the R3131 Series
The maximum safe input levels for the R3131 Series spectrum analyzers are listed below.
A signal power exceeding these limits may damage internal parts such as the mixer.
If there is a possibility that the input signal level may exceed the maximum safe input level,
an external attenuator should be connected to the input port to attenuate the input signal.
Maximum safe input level:
R3131: +20 dBm (Be sure to set the internal input attenuation to 20 dB or more.)
R3131A :+30 dBm (Be sure to set the input attenuation to 30 dB or more.)
AC coupling:Within ±50 VDC
The front two feet beneath the front panel have small extensions which can be used to pro-
vide a better viewing angle (12-degree tilt).
Note the following when using the extensions:
• Use the analyzer on flat surfaces so that the weight of the analyzer is evenly distributed.
• Do not put any objects on the analyzer.
• Do not lean on the analyzer.
• Do not place anything (hands or other objects) between the analyzer and the flat surface on which it is
placed.
• Do not slide the analyzer.
• Do not use excessive force when pressing keys (more than 1 kg).
Make sure the extensions are folded shut when:
• Transporting the analyzer.
• Connecting or disconnecting cables.
• Using the analyzer on a cart.
• The analyzer is not in use.
• The analyzer is in storage.
• The extensions show signs of wear.
Do not use the extensions if they show signs of excessive wear.
The extensions may wear out over time. If this occurs, contact ADVANTEST or our ser-
vice agency for information on how to replace them.
Cautions-1*
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