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ADJUSTMENTS
MODEL
8559A
ADJUSTMENTS
5
-
22. 3
-
dB BANDWIDTH ADJUSTMENTS (Cont'd)
PROCEDURE:
Set spectrum analyzer controls as follows:
FREQUENCYBAND
.................................................
0.01-3GHz
TUNING
.................................................................
35MHz
FREQSPAN/DIV
.........................................................
200kHz
RESOLUTIONBW
.........................................................
lMHz
INPUTATTEN
.............................................................
10dB
.......................................................
REFERENCELEVEL OdBm
Amplitudescale
..............................................................
LIN
SWEEPTIME/DIV
.........................................................
2msec
SWEEPTRIGGER
.....................................................
FREERUN
VIDEOFILTER
.............................................................
OFF
BASELINECLIPPER
........................................................
OFF
..............
853A (if used) TRACE A
&
TRACE B STORE BLANK (ANALOG DISPLAY)
Connect CAL OUTPUT to spectrum analyzer INPUT
Set a 7.1 division signal
level on display with REF LEVEL FINE control. Signal will be 0.9 division from
top graticule line.
Adjust
A9R85
LC
control for a 5 division wide signal at fifth graticule line.
Set RESOLUTION BW to 3 MHz and FREQ
SPAN/DIV to 500 kHz. If necessary, reset signal level to 7.1
divisions with REF LEVEL FINE control. The bandwidth at the fifth graticule line should be between 5.4
and
6.6
divisions.
NOTE
A9R85 LC may be further adjusted to bring the
3
MHz and 300 kHz band
-
widths within limits; however, the final measurement of the
1
MHz band
-
width must be between 4.5 and 5.5 division at the fifth graticule line. (If the 3
MHz bandwidth cannot be brought within limits by adjustment of
A9R85 LC,
change the value of factory
-
selected resistor A9R120*. If the 300 kHz band
-
width cannot be brought within limits by adjustment of A9R85 LC, change
the value of
A9R116*.)
Set RESOLUTION BW to 300 kHz and FREQ SPAN/DIV to 50 kHz. If necessary, reset signal level to 7.1
divisions with REF LEVEL FINE control. The bandwidth should be between 5.4 and
6.6
divisions at the
fifth graticule line.
Set RESOLUTION BW to 100 kHz and FREQ
SPAN/DIV to 20 kHz. If necessary, reset signal level-to 7.1
divisions with REF LEVEL FINE control. The bandwidth should be between 4.3 and 5.7 divisions at the
fifth graticule line.