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Source Attenuator Switch Protection
The programmable step attenuator of the source can be switched between port 1 and port 2
when the test port power is uncoupled, or between channel 1 and channel 2 when the channel
power is uncoupled.
To
avoid premature wear of the attenuator, measurement configurations
requiring continuous switching between different power ranges are not allowed.
For example, channels 1 and 2 of the analyzer are decoupled, power levels in two different
ranges are selected for each channel, and dual channel display is engaged. To prevent
continuous switching between the two power ranges, the analyzer automatically engages
the test set hold mode after measuring both channels once. The active channel continues
to be updated each sweep while the inactive channel is placed in the hold mode. (The
status annotation
tsH
appears on the left side of the display.) If averaging is on, the test
set hold mode does not engage until the
~~~~~
,,
“i;4
_
_
_
.,.,
//.........
.i.
specified number of sweeps is completed. The
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ad
S-m
~.~.$i&&@??
:+.:.:
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:..:
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:.:.;.;.:
_
(see
“l’)-@ger
Menu”)
softkeys
cm
override
this
protection feature.
Allowing Repetitive Switching of the Attenuator
The
jam
:,7
;
':F
"
::
e3:f~$ff$.~
ad
:~~~~~~~~~~.~;
(see
“Trigger
Menu")
softkeys
flow
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. . . . . .
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:..
T
::..
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. . . . . . . . . . . . . . . . .
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. . . .
measurements which demand repetitive switching of the step attenuator. Use these
softkeys
with caution; repetitive switching can cause premature wearing of the attenuator.
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.
.
.
.
.
.
.
. .
.
.
.
.
_
H
imE&3HES
TGE@&@
(see “Trigger Menu”) causes a specified number of measurements to
occur before activating the test set hold mode.
6-20
Application and Operation Concepts