When you press
(
P O W E R LEVEL
),
the active entry area displays:
X
POWER LEVEL:
,
where X represents a numeric value. The data display area indicates:
MTR :
x . x x .
In
Normal, Module,
the
(
P O W E R LEVEL
)
key controls the output
power of the swept CW 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
to -20
This mode of operation requires a feedback connection from the
module to the swept CW generator through the SOURCE MODULE
INTERFACE.
When you press
(
P O W E R LEVEL
),
the active entry area displays:
X
MODULE LEVEL:
,
where X represents a numeric value. The data display area indicates:
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
(
POWER
key controls the linear modulator directly,
from 0 to approximately -80
The attenuator (if present) is
automatically uncoupled from the ALC system.
When you press
(
P O W E R LEVEL
),
the active entry area displays:
X
REFERENCE:
,
where X represents a numeric value. The data display area indicates:
Ref
OFF :
x . x x
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.
Programming Codes
SCPI:
POWer[:LEVEL]
suffix] or
Analyzer:
PL
P-4 Operating and Programming Reference
