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CPC5604ATR 数据表(PDF) 27 Page - Clare, Inc. |
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CPC5604ATR 数据表(HTML) 27 Page - Clare, Inc. |
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27 / 33 page ![]() CPC5604 www.clare.com 27 XXX dBm 500 1K 1.5K 2K Hz 2.5K 3K 3.5K 4K Figure 9B Snoop Mode THD + N Figure 9A Snoop Mode Distortion Setup LITELINK TM DAA Circuit TIP RING IN1 IN2 AP1 Audio Precision Generator -13dbm 1800Hz RX+ RX- Audio Precision System One Analyzer 100K 600 V V T/R RX CID Snoop Mode Distortion Figure 9A can be used for the snoop mode distortion test. Snoop mode operation requires that the DAA be in the on-hook state and the CID pin asserted (driven Low). Distortion in the snoop mode is not critical since — signals coupled through the snoop circuit are either 20Hz ring signals or FSK CID signals. A graph of THD+N for the snoop mode is shown in Figure 9B. |
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