Keysight U8903B, Руководство по обслуживанию

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5 Performance Verification for Bluetooth Card
90 Keysight U8903B Service Guide
– The subsequent Bluetooth audio tests validates the audio functionality of the wideband
HFP audio bandwidth (16 kHz sample rate) using the CVSD audio codec for the
analyzer and generator.
HFP Bluetooth audio test points and limits
The HFP Bluetooth audio test uses a sine wave signal to check the frequency accuracy,
amplitude accuracy, flatness, and THD+N ratio for the analyzer and generator.
Table 5-2 shows the test points as well as the associated test limits for the standard HFP
audio bandwidth (8 kHz sample rate).
Table 5-3 shows the test points as well as the associated test limits for the wideband HFP
audio bandwidth (16 kHz sample rate).
Table 5-2 HFP Bluetooth audio test points and limits for analyzer and generator
Frequency (Hz) Amplitude (dBu) Frequency limit (ppm)
Amplitude accuracy
limit (dB)
THD+N ratio limit (dB)
1000 -15 ± 10 -1 to 0.6 ≤ -20
20 -15 ± 10 -1 to 0.6 ≤ -20
50 -15
±
10 -1 to 0.6
≤
-20
100 -15 ± 10 -1 to 0.6 ≤ -20
500 -15 ± 10 -1 to 0.6 ≤ -20
2000 -15 ± 10 -1 to 0.6 ≤ -20
Table 5-3 Wideband HFP Bluetooth audio test points and limits for analyzer and generator
Frequency (Hz) Amplitude (dBu) Frequency limit (ppm)
Amplitude accuracy
limit (dB)
THD+N ratio limit (dB)
1000 0 ± 10 ± 0.3 ≤ -30
20 0 ± 10 ± 0.3 ≤ -30
50 0
±
10
±
0.3
≤
-30
100 0
±
10
±
0.3
≤
-30
500 0 ± 10 ± 0.3 ≤ -30
2000 0 ± 10 ± 0.3 ≤ -30
3000 0
±
10
±
0.3
≤
-30
3600 0 ± 10 ± 0.3 ≤ -30
5000 0 ± 10 ± 0.3 ≤ -30