(POWER
LEVEL)
When you press (POWER LEVEL), the active entry area displays:
-->
ATTEN
X dB, POWER LEVEL:
X.Xx
dBm
,
where X represents a numeric value. The data display area indicates:
Power
($Bm)
MTR :
x.xx .
In Normal, Module, the (POWER LEVEL) key controls the output
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
[POWER LEVEL) key controls the Level DAC and Level Control Circuits
(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), the active entry area displays:
-->
ATTEN
X dB, MODULE LEVEL:
X.Xx
dBm
,
where X represents a numeric value. The data display area indicates:
Power
(dBm)
MDL :
x.xx .
In ALCoff, there is no feedback voltage to level the power, so power
level is uncalibrated. A leveling point is not specified in this mode.
The [POWER LEVEL) key controls the linear modulator directly,
from 0 to approximately -80 dB. The attenuator (if present) is
automatically uncoupled from the ALC system.
When you press (POWER LEVEL), the active entry area displays:
-->
ATTEN
X dB, REFERENCE:
X.Xx
dB
,
where X represents a numeric value. The data display area indicates:
Ref (dB)
OFF :
x.xx
and the message line indicates: UNLVLED.
In Search, 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.
P-4 Operating and Programming Reference
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