9/29/09 AUD (Optional) 13-13
frequency is unchanged. The icons will show this condition
with the lock and diamond icons as shown below.
Note: To change to another filter in auto mode, just increase
the amplitude until the level is above the trigger level.
When in automatic mode the Automatic Gain Control will
be activated. When the gain is set to 0dB, it will be changed
to +30dB when the signal is more than 45dB below the
overload level for 1.5 seconds. When the gain is set to
+30dB, the gain will be changed to 0dB whenever the
instrument becomes overloaded or the level is within 8dB of
the overload level for 1.5 seconds. The instrument will beep
once when the gain is changed automatically to 0dB and
twice when it is automatically changed to +30dB.
Linearity RTA Check Menu Press the check key c to open the Linearity RTA check
menu, shown below.
The Linearity RTA check menu contains the following
items:
• Set Reference -Set the reference level to the current
level, i.e. zero the display.
• Reference Lvl -Reference level setting that may be
entered manually.
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