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PERFORMANCE TESTS
PERFORMANCE
TESTS
MODEL
8559A
4
-
18. RESIDUAL RESPONSES
SPECIFICATION:
Residual responses are less than
-
90
dBm (0.01
-
3.06 GHz) with 0 dB input attenuation and no signal present
at input. They are less than
-
90
dBm (0.025
-
3.06 GHz) with ALT IF selected.
DESCRIPTION:
Signals present on the display without an input signal applied to the spectrum analyzer are residual responses.
The .Ol
-
3
GHz frequency band is checked for residual responses greater than
-
90
dBm.
EQUIPMENT:
Variable
Persistence/Storage Display
......................................
HP
18
1T/TR
5(M2
Termination, Type N (m)
.......................................
HP
909A,
Opt. 012
NOTE
The HP
853A Spectrum Analyzer Display may be substituted for the HP
181TKR in this procedure.
NOTE
This test can be performed with no input termination if INPUT
ATTEN is set
to
20
dB. Note that the input attenuation must then be taken into consider
-
ation in establishing the equivalent REFERENCE LEVEL control setting for
the measurement. A REFERENCE LEVEL setting of
-
40
dBm with
20
dB
INPUT
ATTEN is equivalent to a REFERENCE LEVEL setting of
-
60
dBm
with
0
dB INPUT ATTEN.
PROCEDURE:
1.
Set spectrum analyzer controls
as
follows:
FREQUENCYBANDGHz
..................................................
.01-3
TUNING
..............................................................
0.050GHz
FREQSPAN/DIV
.........................................................
10MHz
RESOLUTION BW
...............................................
1
MHz, uncoupled
INPUTATTEN
..............................................................
OdB
REFERENCELEVEL
....................................................
-60dBm
REFLEVELFINE
..............................................................
0
Amplitude Scale
........................................................
10 dB/DIV
SWEEPTIME/DIV
........................................................
AUTO
SWEEPTRIGGER
.....................................................
FREERUN
ALTIF
.....................................................................
OFF
SIGIDENT
.................................................................
OFF
BLCLIP
....................................................................
OFF
VIDEOFILTER
.........................................................
12o'clock