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MODEL
8559A
PERFORMANCE TESTS
PERFORMANCE
TESTS
4
-
22.
INPUT ATTENUATOR ACCURACY (Cont'd)
PROCEDURE:
Connect equipment as shown in Figure
4
-
17
and set controls as follows:
Spectrum Analyzer:
..................................................
FREQUENCY BAND GHz .01- 3
TUNING
.................................................................
30MHz
FREQSPAN/DIV
..........................................................
2MHz
.........................................................
RESOLUTIONBW lMHz
INPUTATTEN
.............................................................
60dB
.......................................................
REFERENCELEVEL OdBm
REFLEVELFINE
..............................................................
0
Amplitudescale
........................................................
10dB/DIV
SWEEPTIME/DIV
........................................................
AUTO
SWEEPTRIGGER
.....................................................
FREERUN
ALTIF
.....................................................................
OFF
SIGIDENT
.................................................................
OFF
BLCLIP
....................................................................
OFF
VIDEOFILTER
..........................................................
2o'clock
Signal Generator:
COUNTER MODE
..............................................
INT EXPAND XlO
AM
.......................................................................
OFF
FM
........................................................................
OFF
FREQUENCYTUNE
....................................................
30.0MHz
RF
..........................................................................
ON
OUTPUTLEVEL
..........................................................
OdBm
Set step attenuator to 0 dB and use spectrum analyzer TUNING control to center 30 MHz signal from
signal generator on CRT display. Set FREQ
SPAN/DIV to 20 kHz, RESOLUTION BW to 10 kHz, and
Amplitude Scale to 1
dB/DIV.
Adjust signal generator OUTPUT LEVEL control to position peak of signal seven divisions above grati-
cule baseline.
Set step attenuator and INPUT
AmEN control to settings indicated in Table
4
-
9.
For each setting, record
deviation of signal peak from reference graticule line set in step 3.
NOTE
The REFERENCE LEVEL control setting changes by 10 dB for every 10
-
dB
change in INPUT
ATTEN. Do not change the REFERENCE LEVEL setting
after changing the INPUT
ATTEN setting.