Anritsu MX269018A - Page 155

4.3 Audio Performance Test
4-9
4
Performance Test
1. Connect the devices according to Figure 4.3.2-1.
2 Press
.
3 Press
(Preset) to initialize the MS2830A.
4. Initialize the U8903A.
5. Set the Mode of the MS2830A to RX measurement mode.
6. Set the MS2830A as below.
● High Pass Filter: Off
● Low Pass Filter: Off
● Weighting: Off
7. Set AF Input of the MS2830A as below.
● Input Type: Unbal.
● Input Range: 5 V p
8. Set Generator Channel 1 of the U8903A as below.
Frequency: 1 kHz
Output Level: [Syscal_Unbal_3500] mV rms
Output Type: Unbal
Impedance: 50

Output Signal: On
9. Set the frequency of Generator Channel 1 of the U8903A to 400 Hz.
10. Press
to measure.
11. Record the measurement results of AF Level rms of the MS2830A.
12. Calculate input level accuracy by the formula below.
Input level accuracy = 20 × log (MS2830A Audio Analyzer measured
value/U8903A set value)
13. Set the frequency of No.2 or of bigger number in Table 4.3.2-3 for the
U8903A and repeat Steps 9 through 12.
14. Set the level of No.2 or of bigger number in Table 4.3.2-2 for the
U8903A and the MS2830A and repeat Steps 8 through 13.
15. Set Generator Channel 1 of the U8903A as below.
Frequency: 1 kHz
Output Level: [Syscal_Unbal_3500] mV rms
Output Type: Bal
Impedance: 100

Output Signal: On
16. Repeat Steps 9 through 12.
17. Turn Off the U8903A output.