Appendix A: Speci
fi
cations
Table 4: Electrical characteristics
Characteristic
Description
DS1 Receiver (RCV)
Modes
Term, Monitor, Bridged, CSU/NIU Emulation
Impedance
Terminate, Monitor, Loopback: ~100
Ω
Bridge: >1000
Ω
Sensitivity
Monitor: -15 to -32dB
Terminate/Bridged: +6 to -36 dB
Internal clock
accuracy
1.544 MHz, ±10 ppm
Network loop
frequency
accuracy
±300 ppm
Frequency
measurement
Resolution: 0.1Hz
Accuracy: ±7 ppm (±1.472 Hz)
Sensitivity
Monitor: -15 dB to -32 dB
Terminate and Bridged: +6 dB to -36 dBdsx
Resolution and Accuracy: -1.0 dB to -39.0 dB; ±1.25
dB
Framing
ESF, D4, SLC96, UnFramed
Line codes
B8ZS, AMI
Detected alarm
and error
events
LOS, OOF, AIS, YEL, UAS, CRC, BPV, F-bits, 1’s D,
ExZ
Supported
loopback types
NREM, NLOC, NDU1, NDU2, CREM, CLOC, CDU1,
CDU2, HTU-R, HTU-C, HRE-1, HRE-2, ARM, CSU,
NIU4 fac1, NIU5 fac2, Payload, LINE, Network,
Self-loop, Local-NW
BERT patterns
Off | QRSS | 1:7,1in8 | 3 in 24 | All-1’s | All-0’s | Alt,
1:1 | DALY | B-TAP | 2^15–1 | 2047 | 2 in 8 | 1 in 16
| Auto
NetTek YBT100 and YBT100DS3 Backhaul Tester
39
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