Anritsu MX269018A - Total Ha Armonic Disto Ortion + Noise E

Chapter 4 Performance Test
4-16
4.3.6 Total harmonic distortion + noise
(1) Measuring instrument for tests
Audio Analyzer: U8903A
(2) Setups
Below is the connection when the U8903A is used as Audio Analyzer.
Figure 4.3.6-1 Connection for Total Harmonic Distortion + Noise Test
(3) Test target standards
Table 4.3.6-1 Standard
Standard Condition
< –60 dB 1 kHz, 100 k

termination, 0.7 V rms,
20 Hz to 25 kHz band, 18 to 28°C
(4) Test Procedure
1. Connect the devices according to Figure 4.3.6-1.
2. Press
.
3. Press
(Preset) to initialize the MS2830A.
4. Perform the Audio Generator setting on the MS2830A as below.
Output Type: Unbal.
5. Initialize the U8903A.
6. Set the MS2830A as below.
Waveform : Tones
Tone1 Freq: 1 kHz
Tone1 Level: 700 mV rms
7. Set the LPF of the U8903A analyzer to 30 kHz.
8. Set Output Tone1 of the MS2830A to On to turn On the signal
output.
9. Measure THD+N (dB) by Analyzer Channel 1 of the U8903A.
U8903A
MS2830A
Coaxial Cable