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The Power Menu
The power menu is used to
define
and control analyzer power. It consists of the following
softkeys:
i
.:.
i,
.,..,.
:.:.:.:.:
.,.,
,.,,.,.,.,
;;
_
,.,,
,,.,.,.,.,.,.,.,.
,..,.
,.......
. . . . . . . . . . . . .
n
:~~~~~:~~~~-~~~
allows
you
to
select
power
rages
automatically
or
manually.
/
;:.
. . . .
,...
:?..A ...,,,,,,,,,,,. :.:.::: . . .../ L.~~~;..;::~.~...~-- . . . . . . . . . . . . ../......................./...
:.:...........
,.
/
.
~~~~~~~
provides access to the power range menu.
b
b.. ,,,.............
:.
.:..:...:...<<<<.
.
!&&$~~
compensates for power loss versus the frequency sweep, by sloping the output power
upwards proportionally to frequency.
t’
..,I”
,,:,
I
/,
,)
,.::,::::....:~,::;~;
,,,:,::
~:.~~:,..,,:~:
.<..
W
~~~~~~~~~~6~~~,toggles
the
power
slope
fun&ion
on
or
off.
_
.,.
.,
_
_
c.::.:
,s
".:.:.~...:.~:.:...:.:.::.:.:.:.:.:.:...;::.:.:.:.:.~........:.:.
.I
.
"
,-,-
,,
.<:....:.
.:;,
,,,
~~~~.i:.~~~~~~~~~,,;,
allows you to switch the source power on or off. When a power trip
,,,,.,.
::.,.:>>>>;:
/
p
.,.,
~.:.;~~~:;:.~,.:...~,~:..:,.:.:.:.:.:.:.::...::.:.:.~:.:.:.:.:
. . . .
:.:.:
. .
. . . . :: .,..
::
,__,.,.,_/,
.,.
‘;T,
.*..
*.
.<.
.::::.
occurs, the trip is reset by selecting
‘ZKJM!I&
‘@J&
&&.
.
:~
;
.y;
:
C,‘yJ
:<...
. . . .
::..z.:
,,/:.;
,,......
~.:~~~;.~~~~~~~~~,
allows you to couple or uncouple primary channel power.
:...::;
..>A
:....;:.$::~..z;...~~;~~
. . . . . . . . . . . . . . . . . . . . . . . . .
.i
ii..
.i
.i
. .
.
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . .
;:.:~.:.:.:.:.:.:.:.:
. . . .
~.:.:.:.:.:.:.:~.~.:.~.:.:.:.:.:.:.:.:.:.:.:::.....~.:.........:.:...:..
n
'~~~~~~~,:allows
you
@couple
or~couple
p&power.
::;.;:.;;~;~.~-.l.;.;~~~;;..:...;......;
. . . . .
..s
. . .
..A
w
.A...
. . . . . . . . . .
Understanding the Power Ranges
The built-in synthesized source contains a programmable step attenuator that allows you to
directly and accurately set power levels in eight different power ranges. Each range has a total
span of 25
dl3.
The eight ranges cover the instrument’s full operating range from + 10
dBm
to
-85
dBm
(see
F’igure
6-6). A power range can be selected either manually or automatically.
Automatic mode
..I..... ..w;;:
;:
/,.
:<.,.;:.:.:;.:.:
. . . . . .
:.:.,.:.:.:.:.:.,.:.:.,:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.~:.~:.:.:....’
. . . . . . . . . . .
If
you
s&&
~~~~~~~~~6;
,.......
you
c-8
enter
my
power
level
w-itfi
the
total
operating
range
of the instrument and the source attenuator will automatically switch to the corresponding
range.
Each range overlaps its adjacent ranges by 15
dI3,
therefore, certain power levels are
designated to cause the attenuator to switch to the next range so that optimum (leveled)
performance is maintained. These transition points exist at -10
dl3
from the top of a range and
at
+5
dB
from the bottom of a range. This leaves 10
dl3
of operating range. By turning the
,.
. . . . . . . . . . . . . . . . . . .
. .
. . .. . . .
__
;;
,;
;,.:.,.~~:.:.:.:.:.:.~.:.:.~,.::
.,.
.,.,...
RPG
knob
with
~~~~~:~~~~
being
the
a&ve
fun&ion,
you
cm
hem
the
attenuator
tit,&
m
,:i
;;~...~.,....riL.:::.:~:.....~..~..~~.:.i.........B:::.;
these transitions occur (see
Figure
6-6).
Manual mode
f',.:F;fq$$
. . . . . . .
..."".....'..
.<ss..:
If
you
se&$
~~~~~~~~:~~~
you
must
f&-St
enter
the
power
ranges
menu
and
maufly
@e&,
,
.._....................
._...................-...-............
the power range that corresponds to the power level you want to use. This is accomplished by
..:
”
;,..
.,
./...............;
. .
..a
..7
.“...................;..~..:.:.:.:.:
.,.,...
:.:.:~.,.:.:.:.:..:.:.:.:.:.:..
pressing
the
~~~~~~
softkey
md
&,n
&,&ing
one
of
the
eight
avaable
ranges.
In
..-...............--........................
-
this mode, you will not be able to select power levels greater than 3
dI3
above or below the
range limits This feature is necessary to maintain accuracy once a measurement calibration is
activated.
When a calibration is active, the power range selection is switched from auto to manual mode,
and
PRrn
appears on the display.
6-14
Application and Operation Concepts