Unique Broadband Systems Inc 3260 Manual De Usuario
Fiber Connection Series Microwave Radio Operator’s Manual, Rev. 1
B.2
MMIC
Microwave Monolithic IC
Modem
Modulator/Demodulator
MTBF
Mean Time Between Failure
MUX
Multiplexer. Multiplex: To combine individual data streams
into one composite data stream.
into one composite data stream.
NC
Normally Closed Relay Contact
NF
Noise Figure
NMS
Network Management System
NO
Normally Open “Relay Contact”
NRZ
Non-Return to Zero
OOK
On/Off Keying
P/S
Parallel-to-Serial (Data Stream Conversion) or
Power Supply
Power Supply
RF
Radio Frequency
RS-232
DTE-DCE interface standard. Defines electromechanical
interface, with several related standards, define signal level,
conditions and polarity at each interface connection.
interface, with several related standards, define signal level,
conditions and polarity at each interface connection.
RS-422
DTE-DCE interface standard. Specifies the functional and
mechanical characteristics of the interface between DTE-
DCE.
mechanical characteristics of the interface between DTE-
DCE.
RSSI
Received Signal Strength Indication
RX
Receive(r)
S/N
Signal to Noise
SYM
Symbol
Symbol Rate of
Frequency (fs)
Frequency (fs)
The rates (frequency) at which symbols are generated. Since
Symbols represent any of 3,5 or 7 bits (for 8, 32 and 128
QAM respectively), the system bit rate is 3, 5 or 7 times
higher than the symbol rate.
Symbols represent any of 3,5 or 7 bits (for 8, 32 and 128
QAM respectively), the system bit rate is 3, 5 or 7 times
higher than the symbol rate.
T1
Transmission medium capable of carrying a TDM signal at
1.544 Mbit/s
1.544 Mbit/s
T/R
Transmit / Receive
TX
Transmitter
VCO
Voltage Controlled Oscillator
XO
Crystal Oscillator
XTL
Crystal