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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 filter shape, 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
100 kHz Filter
10 kHz Filter
300 Hz Filter
1 MHz Filter
Figure 5- 8: RF Option Adjustment Locations
h. Set the reference level 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 the 6 dB down point.
k. Check that the filter amplitude is --20 dBm, ±4dB.
l. Disconnect the signal from the RF 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 the RF INPUT.
c. Recall default amplitude normalizations by pressing UTIL5529Y.
Press any menu button to exit the menu.