Chapter 2 331
Performance Verification Tests
39. Residual Responses
Figure 2-57 Residual Response Test Setup
2. Press Preset on the analyzer. Press the Factory Preset softkey, if it is
displayed. Set the analyzer by pressing the following keys:
FREQUENCY, Start Freq, 150 kHz
FREQUENCY, Stop Freq, 1 MHz
AMPLITUDE, –60 dBm
AMPLITUDE, Attenuation, 0 dB
BW/Avg, 3 kHz
BW/Avg, Video BW, 1 kHz
Display, Display Line On, –90 dBm
3. Press Single and wait for a new sweep to finish. Look for any residual
responses at or above the display line.
If a residual is suspected, press Single again. A residual response
will persist on successive sweeps, but a noise peak will not. Note the
frequency and amplitude of any residual responses above the display
line in Table 2-91.
4. Press Preset on the analyzer. Press the Factory Preset softkey, if it is
displayed. Set the analyzer by pressing the following keys:
FREQUENCY, Center Freq, 5.9 MHz
FREQUENCY, CF Step, 9.9 MHz
SPAN, 10 MHz
AMPLITUDE, –60 dBm (50 Ω Input only)
AMPLITUDE, –11.2 dBmV (75 Ω Input only)
AMPLITUDE, Attenuation, 0 dB
BW/Avg, 10 kHz
BW/Avg, Video BW, 3 kHz
Display, Display Line On, –90 dBm, (50 Ω Input only)
Display, Display Line On, –36 dBmV (75 Ω Input only)
5. Repeat step 6 and step 7 until the complete range of frequencies has