SAF CFM-13-LM, Техническое описание

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C F M – L M E Q U I P M E N T
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The CFM-8-LM radio has various versions available:
-
7.900 – 8.400 GHz band,
-
8.275 – 8.500 GHz band;
The CFM-7-LM radio has various versions available:
-
7.125 – 7.425 GHz band,
-
7.425 – 7.725 GHz band.
The ODUs have various types regarding what frequency subband (A, B or C) within a band side
(H or L) they cover; two types of ODUs must be combined for each hop:
−
L and H ODUs: L type ODU transmitter operates in lower frequencies (L band side) and
receiver works in upper frequencies, H type ODU is reverse to L type, - transmitter operates
in upper side of the band and receiver operates in lower side;
−
LA and HA ODUs: LA ODU transmitter operates in A subband of the L band side, HA
ODU transmitter operates in A subband of the H band side;
− LB and HB ODUs;
−
LC and HC ODUs;
The type of ODU depends on what frequency plan the ODU supports.
Duplex spacings
The width of the duplex spacing (difference in Tx and Rx frequencies) for the CFM-22-LM ODU
is either 1008 MHz or 1232 MHz (two different versions of the CFM-22-LM ODU).
The duplex spacing of the CFM-7-LM radio is 154 MHz and 161 MHz.
The duplex spacing of the CFM-8-LM radio is 119 MHz and 266 MHz.
The duplex spacing of the CFM-13-LM radio is 266 MHz.
The duplex spacing of the CFM-15-LM radio is 728 MHz, 420 MHz, and 490 MHz.
The duplex spacing of the CFM-18-LM radio is 1010 MHz.
The duplex spacing of the CFM-22-LM radio is 1008 MHz or 1232 MHz.
The duplex spacing of the CFM-26-LM radio is 1008 MHz.
The duplex spacing of the CFM-38-LM radio is 1260 MHz.
Occupied bandwidth
Supported bandwidths and corresponding bit rates of the CFM-LM ODU are shown in the table
below:
Bit rate
ODU
4 Mbps 8 Mbps 16 Mbps 34 Mbps
CFM-38-LM n/a 7 MHz 14 MHz 28 MHz
CFM-26-LM n/a 7 MHz 14 MHz 28 MHz
CFM-22-LM n/a 7 MHz 14 MHz 28 MHz
CFM-18-LM n/a 7 MHz 13.75 MHz 27.5 MHz
CFM-15-LM n/a 7 MHz 14 MHz 28 MHz
CFM-13-LM n/a 7 MHz 14 MHz 28 MHz
CFM-8-LM n/a 7 MHz 14 MHz 28 MHz
CFM-7-LM n/a 7 MHz 14 MHz 28 MHz
Transmitter power
The maximum transmit power for
−
the CFM-38-LM ODU is 14 dBm,
−
the CFM-26-LM ODU is 19 dBm,
−
the CFM-22-LM ODU is 19 dBm,
−
the CFM-18-LM ODU is 19 dBm,
−
the CFM-15-LM ODU is 20 dBm,
− the CFM-13-LM ODU is 20 dBm,
−
the CFM-8-LM ODU is 27 dBm,
−
the CFM-7-LM ODU is 27 dBm.
The minimum transmit power for all radios is -10 dBm; the transmitter power can be changed
from the minimum up to the maximum level in steps of 1 dB.