When you press
(
P O W E R LEVEL
),
the active entry area displays:
POWER LEVEL:
X. XX
where X represents a numeric value. The data display area indicates:
INT :
x.xx.
In
Normal, Uncoupled Attenuator,
the
[
P O W E R LEVEL
)
key controls
the
Level
and
Level Control Circuits
(see Figure A-l)
within the ALC level range (-l-25 to -20
The attenuator is
uncoupled from the ALC system and is controlled separately with the
Set
key.
When you press
[
P O W E R LEVEL
),
the active entry area displays:
X
A L C :
where X represents a numeric value. The data display area indicates:
Power
INT:
x . x x .
In
Normal, External Detector
the
[
P O W E R LEVEL
)
key
controls the output power of the swept CW generator as compared to
the external detector feedback voltage. 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 a
negative-output
diode detector to the EXT ALC connector.
When you press
[
P O W E R LEVEL
),
the active entry area displays:
X
EXT POWER:
,
where X represents a numeric value. The data display area indicates:
EXT :
x . x x .
In
Normal, Power Meter
the
[
POWER
key controls
the output power of the swept CW generator as compared to the
feedback voltage of the power meter. The attenuator (if present) is
automatically uncoupled from the ALC system and the
P O W E R LEVEL
key controls the
Level DAC
and
Level Control Circuits (see
Figure A-l) within a more restricted range of the ALC level.
Instead of the 45
range of the ALC in other modes, 12
is
available in this mode, with the upper end of the range set by the
Pwr
Mtr
Range
This mode of operation requires a feedback
connection from the recorder output of a power meter.
Operating and Programming Reference P-3