Patton electronics 2720 User Manual

Also see for 2720/I Series: Specification sheet User manual

Contents

11 12Switch S2-6 and S2-7: Clock ModeSet Switch S2-6 and S2-7 to determine the 2720’s transmitter tim-ing.S2-6 S2-7 Clock ModeOff OffNetwork Clock. Transmitter timing isderived from the received line signal.On OffInternal Clock. Transmitter clock isderived from an internal oscillator.NOTE 1: When using the Model 2720 as a high-speed shortrange modem, one unit of the link must be configured in InternalClock mode, and the opposite end unit must be configured forNetwork Clock mode.If the ERR LED on the front of the unit is flashing (or on) it couldbe an indication of a clocking problem. Double check your clockmode settings and Tx Clock Invert S1-3 settings.Switch S2-8 Reserved3.1.2 Switch S1The chart below shows the default configurations for Switch S1. Adescription of all S1 options follows this table.Switch S1-1: RDL TypeSwitch S1-1 selects the type of Remote Digital Loopback that the2720 will initiate when the RDL is initiated from this unit. The 2720will respond to both the V54 and the CSU loopback regardless of thesetting of S1-1S1-1 RDL TypeOn Initiate a V.54 RDL loop when selectedOff Initiate a CSU loopback when selectedSwitch S1-2: ReservedS1 SUMMARY TABEPosition Function Factory Default Selected OptionS1-1 RDL Type OnS1-2 Reserved OnS1-3 Tx Clock Invert OffS1-4 Line Build Out OffS1-5 OffS1-6 Reserved OffS1-7 Reserved OffS1-8 Reserved OffV.54 RDLNormal0dB