Appendix B Specifications
E1 interface connector specifications
114 SmartClass E1 Tester User’s Guide
E1 interface connector specifications
Table 37 provides the connector specifications.
Physical interface specifications
Transmitter
The transmitter operates as per ITU-G.703. Table 38 describes the transmitter
specifications.
Receivers
The receivers operate as per ITU-G.703. Table 39 describes the receiver
specifications.
Table 37 Connector specifications
Connector Specification
RJ-48 Standard telecom RJ-48/RJ-48C
USB USB 1.1/2.0 compliant
DC power 12 VDC, 1.25A Maximum
Table 38 Transmitter specifications
Parameter Specification
Outputs 2 x balanced RJ-48 jacks
Impedance 120 ohms
Unbalanced/ 75 ohms via adapter cables
Bit Rate Range: 2048 MHz ± 512 Hz
Accuracy: ±5 ppm, +1 ppm per year aging
Resolution: 1 Hz
Line Code HDB3 or AMI
Frequency
Offset
+/-100 ppm in 1 ppm intervals
Clock Source
a
a. Internal timing can drift approximately 1ppm per year from the unit’s date of manufacture. If
you need keep the drift from going beyond ± 3 ppm, JDSU recommends that you establish a
calibration schedule.
Internal, Recovered from Rx1 or Rx2, External 2M Reference
Clock (via optional cable)
Table 39 Receiver specifications
Parameter Specification
Inputs 2 balanced RJ-48 jacks
Impedance 120 ohms or bridge (HI-Z)
Unbalanced/ 75 ohms via adapter cables
PMP
Compensation
-16 to -26 dbB resistive loss
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