Instructions

 You can modify this parameter using the numeric keys, knob, or
direction keys.
Reference level located at the top of axis grid. Measurement
near the reference level would gain better accuracy, but input
signal amplitude should not exceed the reference level; if it
exceeds, the signal will be compressed and distorted, result in
wrong measurement. Analyzer’s input attenuation is related with
reference level, it can self-adjust to avoid signal compression.
Minimum reference level is -80dBm at Log scale under 0dB
attenuation.
5.3.2 [Attenuation Auto Manual]
Sets the front attenuator of the RF input in order to permit big signals
(or small signals) to pass from the mixer with low distortion (or low
noise). It only works under internal mixer mode to adjust input
attenuator insider analyzer. In Auto mode, input attenuator is related
with reference level.
Key points:
 When the preamplifier is On, the input attenuation could be set
up to 39 dB. You can adjust the reference level to ensure that
the specified parameters meet the requirement.
 Modifying the reference level may cause an automatic change in
attenuation value; But the change of attenuation value won’t
influence reference level.
 You can modify this parameter using the numeric keys, knob, or
direction keys.
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