Motorola SG 2000 operation manual Feature Description

O p e r a t i o n 5 - 1 1

Tables 5-1 and 5-2 provide additional information on the user-related features and output levels of the SG2-LR:

Table 5-1

SG2-LR features

Feature		Description
Optical power test point		This test point enables monitoring of the optical power level
		at the input to the module. The nominal scale factor is
		1.0 V/mW.
Hybrid current test point		This test point enables monitoring the current drawn by the
		amplifier section of the integrated optical receiver hybrid. The
		nominal scale factor is 1.0 V/A. The hybrid current test-point
		voltage is between 0.150 V and 0.350 V (hybrid current of
		150 mA through 350 mA) when the module is enabled under
		normal operating conditions.
Receiver enable		A green LED that provides visual indication of the receiver’s
		enable status.
Fault indicator		A red LED that illuminates when the module is enabled but
		the hybrid current is outside the normal operating range.
Optical power status		A green LED that is ON (NORM) when the optical power is
		within the recommended operating range (refer to Table A-4).
		Two red LEDs indicate that the optical power is above (HIGH)
		or below (LOW) the recommended optical input power range.
Table 5-2
SG2-LR minimum output levels
Optical input	TP Volts	Output (dBmV)	Output (dBmV)	Comments
level(dBm/mW)	(1 mW=1 V)	77 channels	110 channels
3.2/2.1	2.1	32	30	Low level alarm
3.0/2.0	2.0	31	30	Low level alarm
2.8/1.9	1.9	31	29	Low level alarm
2.6/1.8	1.8	30	29	Low level alarm
2.3/1.7	1.7	30	28	Low level alarm
2.0/1.6	1.6	29	28	Normal
1.8/1.5	1.5	29	27	Normal
1.5/1.4	1.4	28	26	Normal
1.0/1.3	1.3	27	25	Normal
0.8/1.2	1.2	27	25	Normal
0.5/1.1	1.1	26	24	Normal
0.0/1.0	1.0	25	23	Optimum
–0.5/0.9	0.9	24	22	Normal
–1.0/0.8	0.8	23	21	Normal
–1.5/0.7	0.7	22	20	Normal

SG 2000 Installation and O peration Manual