Finisar AN-2030 specifications F i n i s a r, 12Alarm and Warning Thresholds

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r

15) Measured received optical power. Received power, RX_PWR, is given in µW by

2the following equation:

3Rx_PWR (µW) = Rx_PWR(4) * Rx_PWRAD4 (16 bit unsigned integer) +

4Rx_PWR(3)*Rx_PWRAD3(16 bit unsigned integer) + Rx_PWR(2)*Rx_PWRAD2(16 bit

5unsigned integer) + Rx_PWR(1) *Rx_PWRAD (16 bit unsigned integer) + Rx_PWR(0)

6The result is in units of 0.1µW yielding a total range of 0 – 6.5mW. See Table 3.15 for

7locations of Rx_PWR(4-0). Absolute accuracy is dependent upon the exact optical

8wavelength. For the specified wavelength, accuracy shall be better than ±3dB over

9specified temperature and voltage. See module specification sheet for range over

10which accuracy requirement is met.

11

12Alarm and Warning Thresholds

13Each A/D quantity has a corresponding high alarm, low alarm, high warning and low

14warning threshold. These factory preset values allow the user to determine when a

15 particular value is outside of “normal” limits. These values vary with different

16technologies and implementations.

17		Table 3.14: Alarm and Warning Thresholds (2-Wire Address A2h)
18
	Address	# Bytes	Name	Description
	00-01	2	Temp High Alarm	MSB at low address
	02-03	2	Temp Low Alarm	MSB at low address
	04-05	2	Temp High Warning	MSB at low address
	06-07	2	Temp Low Warning	MSB at low address
	08-09	2	Voltage High Alarm	MSB at low address
	10-11	2	Voltage Low Alarm	MSB at low address
	12-13	2	Voltage High Warning	MSB at low address
	14-15	2	Voltage Low Warning	MSB at low address
	16-17	2	Bias High Alarm	MSB at low address
	18-19	2	Bias Low Alarm	MSB at low address
	20-21	2	Bias High Warning	MSB at low address
	22-23	2	Bias Low Warning	MSB at low address
	24-25	2	TX Power High Alarm	MSB at low address
	26-27	2	TX Power Low Alarm	MSB at low address
	28-29	2	TX Power High Warning	MSB at low address
	30-31	2	TX Power Low Warning	MSB at low address
	32-33	2	RX Power High Alarm	MSB at low address
	34-35	2	RX Power Low Alarm	MSB at low address
	36-37	2	RX Power High Warning	MSB at low address
	38-39	2	RX Power Low Warning	MSB at low address
19	40-55	16	Reserved	Reserved for future monitored quantities
20
21	9/26/02 Revision D			Page 20