Anritsu Series MS278XB - Manual (Page 240)

Operation Verification Measurements
5-84 MS278XB OM
Average Noise Level
The following test can be used to verify that the MS2781B is within its average noise level specifications.
Test Setup
Connect the equipment as shown in the figure below:
Test Procedure
1. Turn on the MS2781B Signal Analyzer and allow the instrument to warm up for one hour.
2. Connect a 50
Ω termination to the RF Input connector.
3. Press the Preset key on the MS2781B to reset the instrument to factory default state.
4. Set up the MS2781B as follows:
a. Center Frequency: 10 MHz
a. Frequency Span: 3 kHz
b. Sweep Mode: Single
c. Attenuation: 0 dB
d. Reference Level: –100 dBm
e. Trace Mode: Average
f. Averaging Size: 10
g. Detector: Average
h. Sweep Type: FFT
i. RBW: 0.1 Hz
Figure 5-53. Equipment Setup for Average Noise Level Test