DH+/RIO OPTICAL COMMUNICATION MODULES USERS MANUAL
Copyright © 2003 by Phoenix Digital Corporation, All Rights Reserved.
2.5
INITIAL SIGNAL SET POTENTIOMETERS
(i)
ISS (Initial Signal Set Potentiometers) - Initializes Impending Fault Detection
thresholds for the corresponding optical network receive inputs (see Section
1.3.3.7 for Initialization Procedure)
2.6
DIAGNOSTIC STATUS OUTPUT CONNECTIONS
(i)
IFD (ChA, B Impending Fault Detect... Standalone, Panelmount OCMs only) -
Switches ON (closed contact) when the corresponding optical network receive
input power level drops 3.0 decibel-milliwatts (optical) below the initial signal
strength (see Section 1.3.3.7 for Initialization Procedure). (Diagnostic Select
Switches SW4-1 and SW4-3 must be set ON (active) to enable diagnostic relay
outputs.)
(ii)
ERR (ChA, B Communication Error...Standalone, Panelmount OCMs only) -
Switches ON (closed contact) when the corresponding optical network receive
input fails to detect valid data communications. (Diagnostic Select
Switch SW4-1 must be set ON (active) to enable diagnostic relay outputs.)
(iii)
RSS (ChA, B Receive Signal Strength) - Provides a linear voltage representation
(analog - scaled from 0 to +3.5 VDC) for the corresponding optical network
receive input.
2-4
