Agilent Technologies 8360B, User Manual, Page: 285 / 496

4
POWER LEVEL
5
When y ou press 4 POWER LEVEL 5, the active en try area displays:
--> ATTEN X dB, POWER LEVEL: X.XX dBm ,
where X represen ts a n umeric v alue. The data display area indicates:
Power(dBm)
MTR: X.XX .
In Normal, Mo dule, the 4 POWER LEVEL 5 k ey con trols the output
p o w er of the sw ept signal generator as compared to the feedbac k
v oltage from a millimeter-wa v e source mo dule. The attenuator (if
presen t) is automatically uncoupled from the ALC system and the
4 POWER LEVEL 5 k ey con trols the L evel D A C and L evel Contr ol Cir cuits
(see Figure A-1) within the ALC lev el range (+25 to 020 dBm). This
mo de of op eration requires a feedbac k connection from the mo dule
to the sw ept signal generator through the SOUR CE MODULE
INTERF A CE.
When y ou press 4 POWER LEVEL 5, the active en try area displays:
--> ATTEN X dB, MODULE LEVEL: X.XX dBm ,
where X represen ts a n umeric v alue. The data display area indicates:
Power(dBm)
MDL: X.XX .
In ALCo , there is no feedbac k v oltage to lev el the p o w er, so p o w er
lev el is uncalibrated. A lev eling p oint is not sp ecied in this mo de.
The 4 POWER LEVEL 5 k ey con trols the linear mo dulator directly ,
from 0 to appro ximately 080 dB. The attenuator (if presen t) is
automatically uncoupled from the ALC system.
When y ou press 4
POWER LEVEL
5, the active en try area displays:
--> ATTEN X dB, REFERENCE: X.XX dB ,
where X represen ts a n umeric v alue. The data display area indicates:
Ref(dB)
OFF: X.XX
and the message line indicates: UNLVLED .
In Searc h, an y of the lev eling p oints can b e sp ecied and used as the
comparison feedbac k v oltage. Basically , this mo de op erates the same
as ALCo after the searc hed-for p o w er lev el is reac hed. The active
en try area displays dieren t information dep ending on the lev eling
p oint c hosen.
P-4 Operating and Programming Reference