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M-986-2R2 Scheda tecnica(PDF) 3 Page - Clare, Inc. |
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M-986-2R2 Scheda tecnica(HTML) 3 Page - Clare, Inc. |
3 / 13 page M-986-2R2 www.clare.com 3 Rev. 3 A Transmit Tone Command written while the transceiv- er is in STATE 1 will be acted upon immediately. The transmitter is unconditionally disabled upon entry into STATE 2. If a transmit command is written to the trans- ceiver while in STATE 2, that command will become pending. Upon entry into STATE 1, a pending transmit command is acted upon. In backward mode, the transceiver can exist in two states, STATE 1 and STATE 2: STATE 1: No forward signal detected. Transmitter off unconditionally. STATE 2: Forward signal detected. Transmitter transmits backward signal. A transmit tone command written while the transceiver is in STATE 2 will be acted upon immediately. The transmitter is unconditionally disabled upon entry into STATE 1. If a transmit command is written to the trans- ceiver while in STATE 1, that command will become pending. Upon entry into STATE 2, a pending transmit command is acted upon. EXAMPLE: Assume that the transceivers at both ends of a link are configured in automatic compelled mode. Both transceivers are in STATE 1. A compelled signal- ing sequence begins with the R2F host writing a trans- mit command byte to its transceiver via the coprocessor bus. The transceiver immediately begins transmitting the signal. Automatic Compelled Mode Operation Binary Coding Format Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Transmit tone command 1 CHN 0 0 A B C D Receive tone return 0 CHN 0 0 A B C D CHN: 1 = channel 2; 0 = channel 1 R2 MF Frequencies: ABCD Forward (Hz) Backward (Hz) ABCD Forward (Hz) Backward (Hz) 0 0 0 0 Tone off Tone off 1 0 0 0 1500 & 1860 1020 & 660 0 0 0 1 1380 & 1500 1140 & 1020 1 0 0 1 1620 & 1860 900 & 660 0 0 1 0 1380 & 1620 1140 & 900 1 0 1 0 1740 & 1860 780 & 660 0 0 1 1 1500 & 1620 1020 & 900 1 0 1 1 1380 & 1980 1140 & 540 0 1 0 0 1380 & 1740 1140 & 780 1 1 0 0 1500 & 1980 1020 & 540 0 1 0 1 1500 & 1740 1020 & 780 1 1 0 1 1620 & 1980 900 & 540 0 1 1 0 1620 & 1740 900 & 780 1 1 1 0 1740 & 1980 780 & 540 0 1 1 1 1380 & 1860 1140 & 660 1 1 1 1 1860 & 1980 660 & 540 2 of 6 Coding Format Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Transmit tone command 1 CHN F6 F5 F4 F3 F2 F1 Receive tone return 0 CHN F6 F5 F4 F3 F2 F1 CHN: 1 = channel 2; 0 = channel 1 R2 MF Frequencies: Bit name Forward (Hz) Backward (Hz) Bit name Forward (Hz) Backward (Hz) F6 1980 540 F3 1620 900 F5 1860 660 F2 1500 1020 F4 1740 780 F1 1380 1140 |
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