160 Chapter 2
Performance Verification Tests
21. Resolution Bandwidth Accuracy
Frequency
6 dB Resolution Bandwidth Accuracy
18.Set the analyzer Res BW to 120 kHz and the analyzer span to
180 kHz as shown in Table 2-39.
19.On the analyzer, press Peak Search (or Search), Meas Tools, Mkr→ CF.
20.Set the external 1 dB step attenuator to 6 dB and adjust the
amplitude of the synthesized signal generator for a marker
amplitude reading of −7dBm ±0.2 dB.
21.Press Peak Search (or Search), Marker, Delta on the analyzer.
22.Set the attenuator to 0 dB.
23.On the analyzer, press Marker. Lower the marker frequency by
adjusting the knob until the marker delta amplitude is 0 dB plus the
attenuator error (6 dB) noted in step 5 to tolerance of ±0.05 dB.
24.Record the marker frequency readout in Column 3 of Table 2-39.
25.Using the analyzer knob, raise the marker frequency so that the
marker delta amplitude is maximum. Continue increasing the
marker frequency until the marker reads 0.0 dB plus the attenuator
error (6 dB) noted in step 5 to a tolerance of ±0.05 dB.
26.Record the marker frequency readout in Column 4 of Table 2-39.
27.Set the attenuator to 6 dB.
Table 2-38 3 dB Resolution Bandwidth Accuracy
Column 1 Column 2 Column 3 Column 4 Column 5
Analyzer
Res BW
Analyzer
Span
Lower Marker
Frequency
Upper Marker
Frequency
Test Record
Entry
3 dB
Bandwidth
5 MHz 7.5 MHz 1)
3 MHz 4.5 MHz 2)
1 MHz 1.5 MHz 3)
300 kHz 450 kHz 4)
100 kHz 150 kHz 5)
30 kHz 45 kHz 6)
10 kHz 15 kHz 7)
3 kHz 4.5 kHz 8)
1 kHz 1.5 kHz 9)