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Measurements Operation Verification
MS278XB OM 5-79
Swept Resolution Bandwidth
The following test can be used to verify that the MS2781B is within its Swept Resolution Bandwidth Accuracy
specifications.
Test Setup
Connect the equipment as shown in the figure below:
Test Procedure
1. Set up the instruments as shown in Figure 5-51.
2. Turn on both the MS2781B Signal Analyzer and the MG369XB Signal Generator and allow them to
warm up for one hour.
3. Press the Preset key on the MS2781B to reset the instrument to factory default state.
4. Set the MS2781B to use External Reference signal.
5. Set the output level of the MG369XB to 6 dBm.
6. Set the output frequency of the MG369XB to 100 MHz CW.
7. Set up the MS2781B as follows:
a. Reference Level: 0 dBm
b. Attenuation: Auto
c. VBW: Auto
d. Center Frequency: 100 MHz
8. Set the Span Frequency and the RBW on the MS2781B to the values listed in the first row of
Table 5-6.
9. On the MS2781B, set Peak to CF.
10. Set the MS2781B to measure 3 dB OBW.
11. Verify that the measured OBW is within specifications listed in Table 5-6.
Figure 5-51. Equipment Setup for Swept Resolution Bandwidth Test