Adjustment Procedures
5-32 2715 Spectrum Analyzer Service Manual
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
REFERENCE LEVEL --20 dB m
SPAN/DIV 10 kHz
RESOLUTION BW 10 kHz
VIDEO FILTER Off
VERTICAL SCALE 10 dB/Div
e. Adjust C361, C325, C252, C234, and C210 on the RF Options board
(Figure 5-- 8 on page 5-- 28) forhighest amplitude and best filter shape.
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 amplitudeis --20 dBm, ±4dB.
j. Disconnect the signal from theR F INPUT.
7. Adjust 300 Hz Resolution Bandwidth Filter (C413, C425, C450, and C451
on the RF Options board) as follows:
a. Recall factory default power up settings by pressing UTIL 1 1.
b. Disconnect W47 from J180 on the RF Options assembly (atthe front
connector on the RF Options assembly) and connecta 10.00000 MHz,
-- 15 dBm signal to J180.
c. Select the following settings on the Spectrum Analyzer:
FREQUENCY 100 MHz
REF LEVEL --30 dBm
SPAN/DIV 1 kHz
RES BW AUTO
VID FLTR Off
VERT SCALE 1 0 dB/Div
d. Press SWEEP ↑twice. The display should be a straight line.
e. Adjust C413, C425, C450, and C451 on the RF Options board (Figure 5--8)
for maximum amplitude.