User Manual

AirLink Pro T1/E1 Rack Mount Installer’s Guide
Specifications
Rev. B - 1/97
B-7
E1 Interface Input Specifications
Signal Level No more than 6 dB loss, referenced to the pulse mask.
The transmission medium is assumed to have an F
1/2
characteristic and the loss is measured at 1024 kHz.
Return Loss Frequency Range (kHz) Return Loss (dB)
51 to 102 12
102 to 2048 18
2048 to 3072 14
Loss of Signal Threshold Loss of signal is reported upon detection of 175 ± 75
consecutive zeros.
Input Jitter Tolerance The jitter performance of the AirLink E1 meets or
exceeds all input tolerance, output generation, and
transfer function specifications of Fascicle III.4,
Recommendation G.703.
Radio Interface
Table B-4 (for both T1 and E1)
General
Frequency Band 5.725 to 5.850 GHz
Carrier Frequency 5.7875 GHz
Allocated Bandwidth 125 MHz
Occupied Bandwidth T1=95 MHz
E1=120 MHz
Number of Channels 1
Modulation Type GFSK
Spreading Method Direct Sequence
Spreading Code Eight sets of 32-bit PN sequences
Processing Gain >10 dB
Operating Protocol Time Division Duplex
Frequency Stability 10 ppm
System Gain T1=100 dB
E1=98 dB
End-to-End Delay
End-to-End Delay
T1=3 ms
E1=2.2 ms