Rigol RSA5000 Series, User Manual

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RIGOL Chapter 2 Functions of the Front Panel of GPSA
2-10 RSA5000 User’s Guide
Table 2-7 Reference Level
Parameter Remarks
Default 0 dBm
Range -170 dBm to 30 dBm
Unit
dBm, -dBm, V, mV, uV
Knob Step
I n Log scale mode, step = scale/ 10
I n Lin scale mode, step = 0.1 dBm
Left/ Right Arrow Key Step
Up/ Dow n Arrow Key Step
I n Log scale mode, step = scale
I n Lin scale mode, step = 1 dBm
Attenuation
Sets the RF front-end attenuator to allow high-level signals to pass through the mixer
with low distortion, and low-level signals to pass through the mixer with low noise.
Remarks:

The attenuator consists of f ixed attenuator and variable attenuator. The
attenuation of the f ixed attenuator is 20 dB, and the attenuation range of the
variable attenuator is from 0 dB to 30 dB. Therefore, the input attenuation
ranges from 0 dB to 50 dB.

When the set attenuation amount is greater than 20 dB, f ixed attenuator is
preferred to be used by default.

When the maximum mixer level and reference level are conf irmed, the minimum
of the input attenuation should meet the following equation:
mix Offset Ext PA Ref min
L L a a L ATT
− − + + =
(2-3)
Wherein,
min
ATT
,
Ref
L
,
PA
a
,
Ext
a
,
Offset
L
, and
mix
L
indicate the minimum
input attenuation, reference level, PA, external gain, reference level offset, and
maximum mixer level, respectively.

You can use the numeric keys, the knob, and the arrow keys on the front panel
to modify this parameter; also you can modify it on the touchscreen. For details,
refer to descriptions in "
Parameter Setting ".
Table 2-8 I nput Attenuation
Parameter Remarks
Default
10 dB
Range
0 dB to 50 dB
Unit dB
Knob Step
Preamp off, step = 1 dB
Left/ Right Arrow Key Step
Up/ Dow n Arrow Key Step
5 dB
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