HP 8559A - 4-40

PERFORMANCE TESTS
PERFORMANCE TESTS
MODEL 8559A
4 - 20. GAIN COMPRESSION (Cont'd)
PROCEDURE:
1.
Set equipment controls as follows:
Spectrum Analyzer:
FREQUENCYBANDGHz .................................................. .01-3
.............................................................. TUNING 0.050GHz
FREQ SPAN/DIV ......................................................... 100 kHz
RESOLUTION BW
.............................................. 300 kHz, uncoupled
INPUTATTEN
............................................................. 10dB
REFERENCE LEVEL ....................................................
- 10 dBm
........................................................... REFLEVELFINE - 10
Amplitude Scale
........................................................ 10 dB/DIV
SWEEP TIME/DIV ........................................................ AUTO
SWEEPTRIGGER
..................................................... FREERUN
ALT IF ..................................................................... OFF
.................................................................
SIGIDENT OFF
.................................................................... BLCLIP OFF
............................................................. VIDEOFILTER OFF
Signal Generator:
COUNTERMODE
........................................................... INT
AM ........................................................................ OFF
FM
........................................................................ OFF
FREQUENCYTUNE
...................................................... 50MHz
RF .......................................................................... ON
........................................................ OUTPUTLEVEL -4dBm
2. Connect equipment as shown in Figure 4 - 16. Note that the 10-dB attenuator is placed between the power
splitter and spectrum analyzer INPUT
5(M2 connector.
3. Adjust signal generator OUTPUT LEVEL control for a power meter reading of - 10 dBm ( - 20 dBm at
spectrum analyzer INPUT
5(X2 connector).
4. Adjust spectrum analyzer TUNING control to center 50 MHz signal on CRT. Set Amplitude Scale control
to 1
dB/DIV and adjust REF LEVEL FINE control to place peak of signal at a convenient horizontal
graticule line other than top graticule line.
5. Adjust signal generator OUTPUT LEVEL control for a power meter reading of 0 dBm ( - 10 dBm at
spectrum analyzer INPUT
5(M2 connector).
6.
Set spectrum analyzer REFERENCE LEVEL control to 0 dBm, leaving REF LEVEL FINE control at
setting established in step 4. Record deviation of signal peak from reference graticule line of step 4
(step-
gain error). Values above reference line are positive ( + ); those below are negative ( - ).