⚫ 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.
Attenuator adjustment is to make the maximum signal amplitude
pass from mixer less than or equal to -10dBm. E.g. if the
reference level is +12dBm, the attenuator value is 22dB, then
the input level in mixer is -18dBm (12-22-8=-18), its mainly
purpose is to avoid signal compression. Switch [Input Atten Auto
Manual] to manual mode, adjust the attenuator manually. The
highlight under auto or manual stands for auto coupling and
manual coupling. When attenuator is under manual mode, press
[Input Atten Auto Manual] will match the attenuator and
reference level again.
Note: Maximum input signal amplitude of input attenuator (10dB
input attenuation at least) is +30dBm, higher power signal will
damage input attenuator or mixer.
5.3.3 [Scale/Div]
Sets the logarithmic units per vertical grid division on the display.
Select 1,2,5 or 10dB log amplitude scale. It’s 10dB/div by default.
Every activated marker is with dB as unit, difference between two
markers is treated as marker difference under dB unit.
Key points:
⚫ By changing the scale, the displayed amplitude range is
adjusted.
⚫ The amplitude that can be displayed is from reference level
minus 10 times the current scale value to the reference level.
⚫ You can modify this parameter using the numeric keys, knob, or
direction keys.
5.3.4 [Scale Type Lin Log]
Sets the Scale Type of Y-axis to Lin or Log, the default is Log. It
only works under internal mixer mode. In general, select mV as Lin
amplitude scale unit. Of course there would be other units for
select.
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