VXI 3002 - Manual (Page 57)

3-27
Miscellaneous commands
Attenuator hold
The ATTEN:LOCK command allows you to reduce the RF level by at least another 10 dB without
the step attenuator operating.
ATTEN [not used alone]
:LOCK Lock the Attenuators
:UNLOCK Unlock the Attenuators
Data type : None
Allowed suffices : None
Default suffix : None
Example: ATTEN:LOCK
ATTEN? Prepares message containing information on whether the Attenuators are
locked or unlocked in the following format:
:ATTEN:<status>
where <status> is a program mnemonic indicating whether the
attenuators are locked or unlocked.
Example: :ATTEN:LOCK
Table 3-2 below applies to software versions 1.03 onwards. Maximum level with attenuator lock
on will reduce if AM or pulse modulation is applied. Any user programmed limits for RF level or
offsets will also affect the attenuator lock ranges.
Table 3-2 Attenuator lock ranges
RF level
setting (dBm)
Atten. lock
(min. dBm)
Atten. lock
(max. dBm)
from to
+26.0 +18.0 +7 +25
+17.9 +7.1 −4 +24
+7.0 +7.0 −4 +13
+6.9 -4.0 −15 +13
−4.1 −15.0 −26 +2
−15.1 −26.0 −37 −9
−26.1 −37.0 −48 −20
−37.1 −48.0 −59 −31
−48.1 −59.0 −70 −42
−59.1 −70.0 −81 −53
−70.1 −81.0 −82 −54
−81.1 −92.0 −103 −75
−92.1 −103.0 −114 −86
−103.1 −114.0 −125 −97
−114.1 −125.0 −136 −108
−125.1 −136.0 −137 −119
−136.1 −137.0 −137 −130