Appendix A: Speci
fi
cations
Table 4: Electrical characteristics, (cont.)
Characteristic
Description
Supported
loopback types
DS3 Line, DS3 NIU, All DS1 Channels, DS1 channel
1-28, Self-Loop, Local-NW
DS3 Transmit (XMT)
Modes
TERM, Monitor, THRU, THRU No Generation, DS1
Drop
Framing
C-bit, M13, UnFramed
Line code
B3ZS
Clock
44.736 MHz, ±20 ppm
Impedance
75
Ω
nominal
Transmit levels
DSX, DSX-HI, DSX-LO
Error insertion
Logic, F-bit, BPV, C-bit, P-bit, Ex-Zero
BERT patterns
Off | 2^23-1 | 2^20-1 | 2^15-1 | QRSS | 1010 | 1111 |
1100 | Tx IDLE | Tx AIS | Tx RAI | 1000 | 3 in 24
Supported
loopback types
DS3 Line, DS3 NIU, All DS1 Channels, DS1 channel
1-28, Self-Loop, Local-NW
Table 5: Environmental characteristics
Characteristic
Description
Temperature range
Operating: 0 to +50 °C (+32 °F to +122 °F)
Storage: -20 to +70 °C (-4 °F to +158 °F)
Humidity
Operating: 4% to 90% RH, noncondensing
Altitude
Operating: Up to 3,000 m (9,843 ft.)
NetTek YBT100 and YBT100DS3 Backhaul Tester
41
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