User manual

RIGOL Chapter 2 Front Panel Operation
User’s Guide for DSA800 Series
2-14
Table 2-6 Reference level
Parameter
Explanation
Default
0 dBm
Range
-100 dBm to 20 dBm
Unit
dBm, -dBm, mV, uV
Knob Step
in Log scale mode, step = Scale/10
in Lin scale mode, step = 0.1 dBm
Direction Key Step
in Log scale mode, step = Scale
in Lin scale mode, step = 1 dBm
Input Atten
Set the front attenuator of the RF input in order to ensure big signals (or small
signals) to pass from the mixer with low distortion (or low noise).
Key Points:
 When the preamplifier is On, the input attenuation could be set up to 30 dB.
You can adjust the reference level to ensure that the specified parameter
meets the inequality (2-3).
 You can modify this parameter using the numeric keys, knob or direction keys.
For more details, please refer to “Parameter Setting”.
Table 2-7 Input attenuation
Parameter
Explanation
Default
10 dB
Range
0 dB to 30 dB
Unit
dB
Knob Step
1 dB
Direction Key Step
5 dB