Operating instructions

RCS20 M:N Redundancy Switch Installation
TM056 - Rev. 2.3 2-11
Low Level 0 to 0.8 Volts
External Input B (EXT B)
Impedance: 50, 75, 510O (Jumper-Selectable)
Frequency: 1.25, 2.5, 5.0 and 10.0 MHz
Input Level Spec.: High Level 2 to 5 Volts
Low Level 0 to 0.8 Volts
Internal Reference (Option 1)
Stability: 1 x 10
-5
Output Frequency: 1.25, 2.5, 5.0 and 10.0 MHz (Program-selectable to
match External Input)
Internal Reference (Option 2)
Stability: 1 x 10
-8
Aging (day): 1 x 10
-8
Aging (year): 1 x 10
-8
Output Frequency: 1.25, 2.5, 5.0 and 10.0 MHz (Program-selectable to
match External Input)
Microprocessor Interface
External 1/ External 2/ Internal Reference Select
External Input Activity Detectors
Internal Reference Activity Detector
Reference Output (OUT1, OUT2, OUT3, OUT4)
Output Level: TTL
Output Current Drive: 48 mA Maximum
Sufficient to drive 5: DMD15
DVB3000
DMD2401
Sufficient to drive 3: DMD2400
Output Frequency: Same as External Input
Output Impedance: 50O
Short Circuit Resistant
Board Outline
RCS20 Option Card Slot/DIN Connector
2.6 DDS20 Connector Pinouts
The following connectors are located on the Universal Interface Module on the DDS20. Refer to the
following Tables for the connector pinouts.
2.6.1 J1 - SD - Send Data
J1 is the G.703 Unbalanced Send Data (SD) BNC connector located on the Universal Interface
Module.