Idu transmit specification, 1 idu transmit specification – Comtech EF Data C5 User Manual
Page 86
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Specifications
C5/K1/K3 Integrated Satellite Terminal System
2–52
Rev. 0
2.7.2.1 IDU
Transmit
Specification
Refer to Table 2-31 for IDU transmit specifications.
Table 2-31. IDU Transmit Specifications
Parameter
Specifications
Output Frequency Range
779 to 801 MHz, in 100 Hz steps
Frequency Stability
% 0.01 ppm
Output Power
-10 dBm (factory calibrated)
Output Impedance
50
! % 10%
Output Return Loss
> 12 dB
Output S/N Ratio
> 50 dB
Output Phase Noise
< -63 dBc/Hz at 100 Hz
< -73 dBc/Hz at 1 kHz
< -83 dBc/Hz at 10 kHz
< -93 dBc/Hz at 100 kHz
Undesired Sideband Suppression
< -30 dBc
Carrier Suppression
< -35 dBc
Spurious
< -50 dBc in any 3 kHz BW
Harmonics
< -45 dBc
Output Off Level
< -50 dBm
ODU Power (from center
conductor of IF Output)
+36 VDC (2.5A maximum),
% 1 VDC
ODU Reference
50 MHz at –3 dBm
ODU M&C Data Link
Half Duplex, ASK Modulated serial digital data with either a 3. 68 MHz
Modulated Output Shaping
EFData Closed, Comstream Closed, Fairchild Closed
Modulation
Coherent QPSK or BPSK
Symbol Rate Range (variable):
4.8 to 2500 ks/s
Data Rate Range (variable):
QPSK
BPSK
4.8 to 4375 kbit/s, in 1.0 bit/s steps
2.4 to 1250 kbit/s, in 1.0 bit/s steps
Forward Error Correction
Viterbi K = 7, 1/2, 3/4, and 7/8 rate
Optional: Sequential K = 36, 1/2, 3/4, 7/8 rate
Optional: Reed-Solomon IESS 308/309 Concatenated 225.205 T = 10
Scrambling
CCITT V.35 IESS modified, CCITT V.35 (EFD or CSC Closed), FDC,
2
15
-1 SYNC
Transmit Frequency Change
Time
< 200 ms