Boonton 4541, Instruction Manual

Page: 89 / 262

Boonton 4540 Series RF Power Meter
Operation
4-41
4.5.23 Channel > Ref 1 | 2 Menu
The Reference Menu is used to manually or automatically set a power or voltage reference level or to make the current
power or voltage level the reference level. With the reference mode enabled, power or voltage values will be expressed
relative to the reference rather than absolute. The text display will also show relative values.
Main > Channel > Ref 1 | 2 > Reference
Description: Set the state of the ratiometric reference mode for the
selected channel. When reference level is loaded or
entered, enabling reference mode will cause the
channel’s primary measurement to calculate the ratio of
the current average power to the stored reference in
Modulated mode. Units will be changed to dBr (dB
relative) for log units, or percent (power or voltage) for
linear units. Note that the stored reference should be
loaded from the same sensor that is currently in use on
the channel.
Menu Type: Toggle.
Choices: On, Off
SCPI Command: CALCulate[1|2]:REFerence:STATe <char_data>
Main > Channel > Ref 1 | 2 > Load Ref
Description: Load the current average power level as the ratiometric
mode reference level for the selected channel. The
power level applied to the sensor is stored as the
reference level, and all power readings will be in dBr,
relative to this level. Immediately after the reference is
loaded, the ratiometric power reading will always be
0.000 dBr until the applied power changes. Note: the
value of the Set Ref menu item is changed by this
command.
Menu Type: Action.
SCPI Command: CALCulate[1|2]:REFerence:COLLect
Fig. 4-34 Ref 1 | 2 Menu