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P-4 Operating and Programming Reference
(
When you press
POWER LEVEL
where X represents a numeric value. The data display area indicates:
Power ($Bm)
MTR :
x . x x .
Normal, Module,
In
power of the swept signal generator as compared to the feedback
voltage from a millimeter-wave source module. The attenuator (if
present) is automatically uncoupled from the ALC system and the
[
)
key controls the
POWER
LEVEL
(see Figure A-l) within the ALC level range (+25 to -20 dBm). This
mode of operation requires a feedback connection from the module
to the swept signal generator through the SOURCE MODULE
INTERFACE.
[
When you press
POWER LEVEL
where X represents a numeric value. The data display area indicates:
Power (dBm)
MDL :
x . x x .
In
there is no feedback voltage to level the power, so power
level is uncalibrated. A leveling point is not specified in this mode.
[
)
The
key controls the linear modulator directly,
POWER LEVEL
from 0 to approximately -80 dB. The attenuator (if present) is
automatically uncoupled from the ALC system.
(
When you press
POWER LEVEL
where X represents a numeric value. The data display area indicates:
Ref (dB)
OFF :
x.xx
and the message line indicates: UNLVLED.
Search,
In
any of the leveling points can be specified and used as the
comparison feedback voltage. Basically, this mode operates the same
as ALCoff after the searched-for power level is reached. The active
entry area displays different information depending on the leveling
point chosen.
),
the active entry area displays:
(
)
the
key controls the output
POWER
LEVEL
Level DAC
),
the active entry area displays:
),
the active entry area displays:
Level Control Circuits
and
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