Adjustment Procedures
2715 Spectrum Analyzer Service Manual 5-31
f. Set the reference levelfor 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 th e6 d B down point.
i. Check that the filter amplitude is -- 20 dBm, ±4dB.
j. Disconnect the signal from theR 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 theR F 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 filtershape.
f. Set the reference levelfor 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 th e6 d B down point.
i. Check that the filter amplitude is -- 20 dBm, ±4dB.
j. Disconnect the signal from theR 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.