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Adjustment Procedures
2715 Spectrum Analyzer Service Manual
5-31
f. Set the reference level for a full screen display, and enable the VID
FLTR.
g. Enable bandwidth mode by pressing APPL 9 0 and entering --6 dB, then
pressing BKSP 0.
h. Check bandwidth shape factor. The bandwidth at the 60 dB down point
must not exceed 7X the bandwidth at the 6 dB down point.
i. Check that the filter amplitude is --20 dBm, ±4dB.
j. Disconnect the signal from the R F INPUT.
5. Adjust 3 kHz Resolution Bandwidth Filter (C211, C220, and C230 on the
VR Filter board) as follows:
a. Recall factory default power up settings by pressing UTIL 1 1.
b. Connect a 100 MHz/--30 dBm signal to the RF INPUT.
c. Recall default amplitude normalizations by pressing UTIL5529Y.
Press any menu button to exit the menu.
d. Select the following settings on the Spectrum Analyzer:
FREQUENCY 100 MHz
REF LEVEL --30 dBm
SPAN/DIV 2 kHz
RES BW 3 kHz
VID FILTER Off
VERT SCALE 10 dB /Div
e. Adjust C211, C220, and C230 on the VR Filter board (Figure 5--9 on
page 5--29) for highest amplitude and best filter shape.
f. Set the reference level for a full screen display, and enable the VID
FLTR.
g. Enable bandwidth mode by pressing APPL 9 0 and entering --6 dB, then
pressing BKSP 0.
h. Check bandwidth shape factor. The bandwidth at the 60 dB down point
must not exceed 7X the bandwidth at the 6 dB down point.
i. Check that the filter amplitude is --20 dBm, ±4dB.
j. Disconnect the signal from the R F INPUT.
6. Adjust 10 kHz Resolution Bandwidth (C361, C325, C252, C234, and C210
on the RF Options board) as follows:
a. Recall factory default power up settings by pressing UTIL 1 1.