Viavi T-BERD MTS 5800, Руководство по началу работы

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Appendix A Specifications
MSAM specifications
T-BERD/MTS/SC Getting Started Guide
March 2018 22046537, Rev. 016 Page 181
DTE emulation
Table 52 lists specifications for X.21 testing in DTE emulation mode.
DCE emulation
Table 53 lists specifications for X.21 testing in DCE emulation mode.
R Receive Data
S Receiver Signal Element Timing
1
Shield
G Signal Ground
T Transmit Data
X Transmitter Signal Element Timing
2
1. The equivalent of an STC circuit is not available in X.21; when testing a X.21 interface, select S instead.
2. Interchange Circuit X (DTE signal element timing = Transmit Clock) is provided per ISO 4903.
Table 52 X.21 DTE emulation specifications
Specification Description
User controllable lead C (Control lead)
Sync Timing Mode
Rx Timing Sources
– Interface (from the S circuit)
– Interface Recovered
Sync Timing Mode
Tx Timing Sources
– Interface (from the S circuit)
– Interface Recovered
– Internal Synthesizer
– External Clock
Table 53 X.21 DCE emulation specifications
Specification Description
User controllable lead I (Indication lead)
Sync Timing Mode
Rx Timing Sources
– Interface (from the X circuit)
– Internal Synthesizer
– External Clock
– Interface Recovered
Table 51 X.21 circuits (Continued)
Supported Circuits