HP 70000 series, Руководство пользователя

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SWPTIME
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STP GAIN AutoMan
Control the rst step gain in the signal path.
F or some applications , it is desirable to have a high degree of control over the gain through the
signal path. The input attenuation is already controllable by use of the A T command. The step
gains in the path typically are automatically controlled and are set as appropriate depending
upon the appropriate current system parameters (such as the desired reference level). (A step
gain is dened as a programmable gain functional block with a label of \SG".)
The SG command allows direct control of the step gains in the signal path. If there is more
than one step gain in the signal path, the gain will be applied as late as possible in the signal
path (toward the detector in preference to toward the mixer). Multiple step gains may be used
to achieve the requested total step gain.
The SG information is part of the instrument state , so SA VES/RCLS will interact properly with
this command.
An '*' annunciator will appear to the right of the RL annotation if the SG is not in A UTO .
The SG command is fully supported by the Compiled Instrument-C environment.
If SG is set explicitly , a warning \P ossible compression" (warning # 16007) will be issued if the
step gain total is too high for the detector .
Functional Type:
amplitude
Firmkey A ccess:
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Amptd
Preset State:
A uto
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SWPTIME
(sweep time) describes the marker position in terms of sweep time . The left side of the
graticule corresponds to 0 seconds . The right side corresponds to the sweep time .
Functional Type:
marker
Firmkey A ccess:
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Marker
Preset State:
O
Softkey Descriptions 4-161