Tektronix RSA3300A, Service Manual

Page: 62 / 284

Brief Procedures
4- 6
RSA3303A & RSA3308A Service Manual
Span RBW
Setup display
Span setting
Figure 4- 2: Setup display
c.
Using the general purpose knob, change the span setting as listed in
Table 4--1 and check that the RBW is displayed correctly.
Table 4- 1: Span and RBW
Span RBW
15 MHz 80 kHz
5 MHz 20 kHz
100 kHz 500 Hz
1 kHz 20 Hz
d. Using the numeric keypad, set the span back to 15 MHz.
(Press
1
>
5
>
MHz
, in that order, on the keypad.)
7.
Check the reference level:
a. Press the AMPLITUDE key on the front panel.
b. Make sure that the reference level is set to 0 dBm with the Ref Level
side key. Check that 0 dBm is displayed on the upper left side of the
graticule (see Figure 4--3).
c. Use the general purpose knob to set the reference level to --30 dBm.
d. Confirm that A/D OVERFLOW is indicated in the red box at the top
center of the screen. Make sure that --30 dBm is displayed on the upper
left side of the graticule and that the spectrum waveform is distorted as
shown in Figure 4--3.
e. Using the numeric keypad, set the reference level back to 0 dBm.
(Press 0 > ENTER , in that order, on the keypad.)