4
POWER LEVEL
5
When you press
4
POWER LEVEL
5
, the active entry area displays:
--> POWER LEVEL: X.XX dBm
,
where X represents a numeric value. The data display area indicates:
Power(dBm)
INT: X.XX
.
In
Normal, Uncoupled Attenuator
, the
4
POWER LEVEL
5
key controls
the
Level DAC
and
Level Control Circuits
(see Figure A-1)
within the ALC level range (+25 to
0
20 dBm). The attenuator is
uncoupled from the ALC system and is controlled separately with the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Set Atten
key.
When you press
4
POWER LEVEL
5
, the active entry area displays:
--> ATTEN X dB, ALC: X.XX dBm,
where X represents a numeric value. The data display area indicates:
Power(dBm)
INT: X.XX .
In
Normal, External Detector (ExtDet)
, the
4
POWER LEVEL
5
key
controls the output power of the swept signal generator as compared
to the external detector feedbackvoltage. The attenuator
(if present) is automatically uncoupled from the ALC system and the
4
POWER LEVEL
5
key controls the
Level DAC
and
Level Control Circuits
(see Figure A-1) within the ALC level range (+25 to
0
20 dBm).
This mo de of op eration requires a feedback connection from a
negative-output
dio de detector to the EXT ALC connector.
When you press
4
POWER LEVEL
5
, the active entry area displays:
--> ATTEN X dB, EXT POWER: X.XX dBm ,
where X represents a numeric value. The data display area indicates:
Power(dBm)
EXT: X.XX .
In
Normal, Power Meter (PwrMtr)
, the
4
POWER LEVEL
5
key controls
the output p ower of the swept signal generator as compared
to the feedbackvoltage of the p ower meter. The attenuator
(if present) is automatically uncoupled from the ALC system and
the
4
POWER LEVEL
5
key controls the
Level DAC
and
Level Control
Circuits
(see Figure A-1) within a more restricted range of the ALC
level. Instead of the 45 dB range of the ALC in other mo des, 12 dB
is available in this mo de, with the upper end of the range set by the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Pwr Mtr Range
softkey. This mo de of op eration requires a feedback
connection from the recorder output of a power meter.
Operating and Programming Reference P-3
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