The Power Menu; Understanding The Power Ranges; Automatic Mode; Manual Mode - Agilent Technologies 8719D User Manual

The Power Menu

The power menu is used to define and control analyzer power. It consists of the following
softkeys:
. ~~,'~~~G~:~~~~~ &. a.llows you to select power ranges automatically or manuahy.
n
n
between coupler A and sampler A.
n ~~~~~~~~~ (Option
between coupler B and sampler B.
. $R&# P$& .~~~~~~~' allows you to couple or uncouple channel power.
. . . . . . r , . , : . : . : . .
. ,~~~~.,:~~~ allows you to couple or uncouple port power.
. . . i

Understanding the Power Ranges

The built-in synthesized source contains a programmable step attenuator that allows you to set
power levels in twelve different power ranges. Each range has a total span of 20 dB (15 dl3,
HP 8722D). The twelve ranges cover the instrument's full operating range. A power range can
be selected either manually or automatically.

Automatic mode

of the instrument and the source attenuator will automatically switch to the corresponding
range.
Each range overlaps its adjacent ranges by 15 dB (10 dB, HP 8722D), 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 dB (-5 dB,
HP 8722D) from the top of a range and at +5 dl3 from the bottom of a range. This leaves 5 dl3
of operating range. By turning the front panel knob knob with ~~~~~~~ being the active
function, you can hear the attenuator switch as these transitions occur (see F'igure 6-6).
the power range that corresponds to the power level you want to use. This is accomplished by
this mode, you will not be able to use the step keys, front panel knob, or keypad entry to select
power levels outside 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 PRm appears on the display.
Application and Operation Concepts
on or off. When a