70/140 mhz if interface, L-band rf interface – Comtech EF Data MIDAS 4 System and Design User Manual
Page 121
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System and Design Manual, Revision 2
Traffic
Node
6–23
7
7
0
0
/
/
1
1
4
4
0
0
M
M
H
H
z
z
I
I
F
F
I
I
n
n
t
t
e
e
r
r
f
f
a
a
c
c
e
e
The traffic node connects to the RF equipment via the IF interface, whose
characteristics are as follows:
Operating IF Range 50 to 180 MHz
Characteristic Impedance 75
Ω
Transmit Level:
SNM-1000, SNM-1010
SDM-100,
SDM-300/300A
CDM-550, CDM-600, CiM-550
-30 to -5 dBm
-30 to -5 dBm
-20 to 0 dBm
Receive Level (at Modem):
SNM-1000, SNM-1010
SDM-100,
SDM-300/300A
CDM-550, CDM-600, CiM-550
-55 to -30 dBm
-55 to -30 dBm
-60 to –30 dBm
L
L
-
-
B
B
a
a
n
n
d
d
R
R
F
F
I
I
n
n
t
t
e
e
r
r
f
f
a
a
c
c
e
e
Operating RF Range
Transmit Level:
SNM-1010L
Receive Level (at Modem):
SNM-1010L
950 to 1750 MHz
-40 to 0 dBm
-135 dBm + 10log(symbol rate)
to –85 dBm +10log (symbol rate)
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