User's Manual

Appendix A Specifications
E4/STM-1e specifications
T-BERD/MTS 5800 Getting Started Manual
119
Receiver
(E4 circuits)
Table 28 lists specifications for the receiver when running E4
applications.
Transmitter
(E4 circuits)
Table 29 lists specifications for the transmitter when running
E4 applications.
Table 28 E4 receiver specifications
Parameter Specification
Connector One BNC
Bit rate 139.264 Mbps
Impedance Nominal 75 Ω at 70 MHz unbalanced
Range – Term: 0 to 12 dB due to cable loss at 70 MHz, from a
nominal signal
– Monitor: -20 dB due to resistive loss in addition to 0 to 12
dB due to cable loss at 70 MHz, from a nominal signal
Table 29 E4 transmitter specifications
Parameter Specification
Connector One BNC
Bit rate 139.264 Mbps
Line coding CMI
Tx clock
(Timing)
– Internal reference clock with accuracy ±1.5 ppm, ±1 ppm
per year aging
– Recovered from E4 Rx
– 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