User's Manual

Appendix A Specifications
E4/STM-1e specifications
T-BERD/MTS 5800 Getting Started Manual
121
Transmitter
(STM-1e
circuits)
Table 32 lists specifications for the transmitter when running
STM-1e applications.
Physical
measurements
(STM-1e
circuits)
Table 33 lists frequency and level measurement specifica-
tions when running STM-1e applications.
Table 32 STM-1e transmitter specifications
Parameter Specification
Connector One BNC
Bit rate 155.52 Mbps
Line coding CMI
Tx clock
(Timing)
– Internal reference clock with accuracy ±1.5 ppm, ±1 ppm
per year aging
– Recovered from Rx1
– External from BITS, SETS, or CLOCK
Frequency offset ±50 ppm, in 1 ppm steps
Pulse Nominal 1.0 Vpp Complies with ITU-T G.703 (11/01)
Impedance Nominal 75 Ω
Table 33 STM-1e frequency and level measurement specifications
Parameter Specification
Tx and Rx
Frequency
– Range: 155.52 MHz ±50 ppm
– Accuracy: ±1.5 ppm, ±1 ppm per year aging
– Resolution: 1 Hz or 1 ppm
Level Vpp – Range: 1.4 V to 0.01 V
– Resolution: 0.01 V
– Accuracy: ±0.02 V ±10%