Premier Mounts specifications Comtech EF Data CDM-600 Transmit

CDM-600 Satellite Modem	Revision 7
Remote Control	MN/CDM600.IOM

0.00	0.10	0.20	0.30	0.40	0.50	0.60	0.70	0.80	0.90	1.00	1.10	1.20	1.30	1.40	1.50
0													Symbol Rate, Rs
-5	Comtech EF Data
-10	CDM-600 Transmit
	Power Spectral Density,
	referred to symbol rate

-15

-20

-25

-30

-35

Intelsat

IESS 308/309

Limit

-40
-45					CDM-600 Modulator
				typically < -50 dB, and
					guaranteed to be
					< -45 dB at offsets
						> 0.75 Rs
-50	Spectral		Intelsat
		IESS 308/309
	density,		Limit
	dB
-55

15.2Demodulator

Data rate range, operating modes, de-scrambling, input impedance/return loss etc, as per

Modulator

Input power range	-30 to -60 dBm (desired carrier)
	+35 dBC maximum composite, up to -5 dBm
FEC	Viterbi: 3 bit soft decision
	Sequential: 2 bit soft decision
	Trellis: Per IESS-310
	Reed-Solomon(Open Network): Per IESS-308/309/310
	Reed-Solomon(Closed Network): Proprietary
	Turbo Product Codec: 6 bit soft decision, proprietary
	LDPC: 5 bit soft decision, proprietary
Acquisition range	±1 to ±32 kHz, programmable in 1kHz increments
Acquisition time	Highly dependent on data rate, FEC rate, and demodulator acquisition range. Examples: 200 ms
	average at 64 kbps, R1/2 QPSK, ±32 kHz acquisition sweep range, 6dB Eb/No
	5 s average at 9.6 kbps, R1/2 QPSK, ±10 kHz, 6dB Eb/No
	Note that Reed-Solomon increases acquisition time, due to the additional time taken for the RS
	decoder to declare synchronization.
Clock tracking range	± 100 ppm min

15–3