F i n i s a r |
1 calibrated to absolute units using the most representative fiber output type.
2Accuracy is ±3dB. Data is not valid when the transmitter is disabled.
35) Measured RX received average optical power in mW. Represented as a 16 bit
4unsigned integer with the power defined as the full 16 bit value (0 – 65535) with LSB
5equal to 0.1 µW, yielding a total range of 0 to 6.5535 mW (~
6 Absolute accuracy is dependent upon the exact optical wavelength. For the
7specified wavelength, accuracy is ±3dB. See module specification sheet for range
8over which accuracy requirement is met.
9Tables 3.12 and 3.13 below illustrate the 16 bit signed twos complement format used for
10temperature reporting. The most significant bit (D7) represents the sign, which is zero
11for positive temperatures and one for negative temperatures.
12Table 3.12: Bit weights (°C) for temperature reporting registers
13 |
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| Most Significant Byte (byte 96) |
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| Least Significant Byte (byte 97) |
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14 | D7 | D6 |
| D5 | D4 |
| D3 |
| D2 |
| D1 |
| D0 | D7 |
| D6 | D5 | D4 | D3 | D2 | D1 | D0 | |||||
| SIGN | 64 | 32 | 16 | 8 |
| 4 |
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| 1 | 1/2 |
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| 1/16 | 1/32 | 1/64 | 1/128 | 1/256 | ||||
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16 |
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| Table 3.13: Digital temperature format |
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| Temperature |
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| BINARY |
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| DECIMAL |
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| +127.996 |
| +127 255/256 |
| 01111111 |
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| 7F |
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19 |
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| 00000000 |
| 7D |
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22 |
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| 11111111 |
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| FF |
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23 |
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| 00000000 |
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| 11100111 |
| 00000000 |
| E7 |
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| 11011000 |
| 00000000 |
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24 |
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| 10000000 |
| 00000001 |
| 80 |
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| 10000000 |
| 00000000 |
| 80 |
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26
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9/26/02 Revision D | Page 18 |
