Adjustment Procedures
5-28 2715 Spectrum Analyzer Service Manual
g. Adjust C561, C544, C522, and C416 on the RF Options board (Figure 5--8)
for highest amplitude, best filtershape, and centering about the stored
30 kHz filter.
C120 C233 C260
C270
C234
C252 C361
C450 C451
C522 C544 C561
C210
C416
C413 C425
C325
RF Options Board
100kHz F ilter
10kHz F ilter
300Hz F ilter
1MHz Filter
Figure 5- 8: RF Option Adjustment Locations
h. Set the referencelevel for a full screen display, and enable the VID FLTR.
i. Enable bandwidth mode by pressing APPL 9 0 and entering --6 dB, then
pressing BKSP 0.
j. 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.
k. Check that the filter amplitudeis --20 dBm, ±4dB.
l. Disconnect the signal from theR F INPUT.
2. Adjust 300 kHz Resolution Bandwidth Filter (C611, C612, C620, and C621
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.