Agilent Technologies HP 83711A, Руководство пользователя

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L VL CR ON/OFF
The L VL CR ON/OFF (level correct on/o) function (4
SHIFT
5 , 4
POWER LEVEL
5 )
toggles the level correct function on and o.
When the level correct function is on, the L VL COR annunciator is lit and the
data in the current level correction table is used to change the power level
of the synthesizer . The current level correction table is either the last level
correction that was run or the last table recalled from one of the four level
correction register locations .
The level correct function compensates for path loss measured during the
level correct routine and changes power levels accordingly . Thus , power is
at and leveled over the range of frequency points where data was measured
during the routine . F or example , assume that the level correction factor at 10
GHz is 04 dB (because there is 4 dB of path loss between the RF OUTPUT
connector and the test point). Then, if 010 dBm is desired at 10 GHz (and
the level correct function is turned on), the synthesizer actually generates 06
dBm so that the power level at the test point is 010 dBm. Notice that path
loss correction is independent of power level.
The preset condition for this function is o.
Notes
1. When level correction is activated and more power is required at the RF OUTPUT than the
synthesizer can deliver , an error message is generated and the UNL VL annunciator lights. This can
occur when the external signal path has loss and the power level is set close to maximum leveled
power .
2. If the level correct function is on and an output frequenc y is requested from the synthesizer that is
either greater than the stop frequenc y or less than the start frequenc y , an error message will be
generated and the le v el correction factor for the requested frequenc y will be zero (no correction).
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