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Gain and IMD Power
Sweep
Procedure:
n
Measurement Type: Drop down options. Set to
“Gain and IMD ” for this test.
n
Main Tone (MHz): CW Frequency setting for
source 1.
n
Offset (kHz): Offset frequency for Source 2
(Source 2 will be set to Main Tone + Offset)
n
Start Power (dBm): Power will be swept starting
at the start power (input RF power to AUT). Both
sources are simultaneously set to each power set
-
ting. The stop power is also entered in the “to” win
-
dow.
n
Data Points: Number of data points in power
sweep.
n
Increment Power (dBm): Value to increment
power for each data point (calculated and dis-
played only).
n Source Attn (dB):Value of Source attenuation, be-
tween 0 and -70 (calculated and displayed only).
n
Drain Current Checkbox: When checked the
drain current is measured and power added effi-
ciency is calculated and displayed.
n
PStop Level (dB):Provides the ability to set the
PStop value based on the level of gain compres
-
sion. Drop down options include compression levels
of 1 dB through 10 dB in 1 dB increments, and
OFF. If OFF is selected, then the P Stop equals the
value entered in the “to” window above. If the se
-
lected compression occurs, PStop for all subse
-
quent power sweeps is reset to one increment be
-
fore the P
in
value where this compression level is
reached.
POWER SWEEP, TWO TONE OPERATIONS, MEASUREMENT
5-18 ME 7840A OMM