Comtech EF Data SNM-1002 - Manual (Page 26)

SNM-1002 LinkSync™ Modem Revision 2
Introduction MN/SNM1002.OM
1–8
1.4.2 Environmental and Physical
Table 1-2. Environmental and Physical
Parameter Specifications
Size 1 rack unit (1RU)
1.75" H x 19.0" W x 14" D (4.4 H x 48 W x 36 D cm)
Power Prime power 90 to 264 VAC, 47 to 63 Hz,
40W maximum, fused at 2A
Optional: 38 to 64 VDC
Operating Temperature 0 to 50
°C (32 to 122° F)
Storage Temperature -55 to +70
° C (-67 to 158° F)
Humidity 0 to 95% non-condensing
Mounting Standard 19-inch (48.3 cm) rack mounts
Note: Front and rear accepts standard rack mount slides
Operational Shock When any one corner of the modem is dropped from 1 cm
onto a hard surface, the modem will not take any errors or
faults
MIL-STD-167-1
Survivability Shock and Vibration MIL-STD-810D Method 514.4, Procedure 8, 1 hour/axis
Weight 9 lbs. Maximum
(4 kg Maximum)
Shipping:
Weight
Size
15 lbs. (7 kg)
20 x 21 x 9 inch (51 x 53 x 23 cm)
1.5 Bit Error Rate Performance
The following specifications for the E
b
/N
0
required to achieve 10 -3 to 10 -8
BER for
different coding configurations. All values are for operating in QPSK mode. Without
coding, the modem provides QPSK operation within 0.8 dB of theoretical for BER in the
range 10
-1 to 10 -6 . Performance measurements were recorded with transmit and receive IF
connected back-to-back through an additive white Gaussian noise channel. Refer to
Figure 1-6 for the performance BER curves.
E
b
/N
0
(dB) Specification
BER 1/2 Rate 3/4 Rate 7/8 Rate
10 -3 4.2 5.2 6.4
10 -4 4.8 6.0 7.2
10 -5 5.5 6.7 7.9
10 -6 6.1 7.5 8.6
10 -7 6.7 8.2 9.2
10 -8 7.2 8.8 9.9