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| 型号： | TRF5525AALB |
| 厂商： | OPNEXT INC |
| 元件分类： | 光收发 |
| 英文描述： | FIBER OPTIC TRANSCEIVER, 1274-1356nm, 622Mbps(Tx), 622Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
| 文件页数： | 35/35页 |
| 文件大小： | 902K |
| 代理商： | TRF5525AALB |
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Technical Data for SFP Transceiver Series (Rev. 2.2 March 17, 2006)
Opnext, Inc.
- 9 -
Digital Diagnostics (Enhanced Monitoring)
General
Some of the SFP transceivers are supplied with enhanced monitoring functions as specified
per SFF-8472 (Rev 9.5 June 1, 2004). 2 wire serial bus address 1010001X (A2h) is used to
access measurements of transceiver temperature, internally measured supply voltage,
transmitter bias current, transmitter output power, and received optical power.
Calibration
Measurements are converted from raw A/D values to real world units using external
calibration1. Calibration constants are stored in EEPROM locations 56 – 95 at 2 wire serial
bus address A2h. Calibration is valid over specified operating temperature and voltage.
Measurement Accuracy
After external calibration, the results are consistent with the accuracy and resolution goals for
internally calibrated devices, as specified in SFF-8472.
Alarm and Warning Thresholds
Each A/D quantity has a corresponding high alarm, low alarm, high warning and low warning
threshold. These factory-preset values allow the user to determine when a particular value is
outside of normal limits. When external calibration is used, data may be compared to alarm
and warning threshold values before or after calibration by the host. Comparison can be done
directly before calibration. If comparison is to be done after calibration, calibration must first
be applied to both data and threshold values. The values reported in the alarm and warning
thresholds area may be temperature compensated or otherwise adjusted when setting warning
and/or alarm flags.
1 Internal Calibration option will be available for all codes
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