Premier Mounts specifications CDM-600 Satellite Modem Revision Summary of Specifications

CDM-600 Satellite Modem		Revision 7
Summary of Specifications		MN/CDM600.IOM
Scrambling	IDR Mode, no RS, - per ITU V.35 (Intelsat variant)
	IBS mode, no RS - per IESS-309, externally frame synchronized
	Transparent Closed Network mode, no R-S or Turbo coding - per ITU V.35 (Intelsat variant)
	EDMAC mode, no R-S coding - externally frame synchronized - proprietary
	Turbo Product Code mode - externally frame synchronized - proprietary
	All R-S modes - externally frame synchronized per IESS-308/309/310
FEC	None: Uncoded BPSK/QPSK/OQPSK
	Viterbi: k=7, per IESS-308/309
	BPSK: Rate 1/2
	QPSK/OQPSK: Rate 1/2, Rate 3/4 and Rate 7/8
	16-QAM: Rate 3/4 and Rate 7/8 (Viterbi plus Reed-Solomon only)
	Sequential:
	k=36 (Rate 1/2) per IESS-309
	k= 63 (Rate 3/4) per IESS-309
	k= 87 (Rate 7/8)
	Important note: Sequential decoding limits the data rate to a maximum of 2.048 Mbps for OQPSK and
	1.024 Mbps for BPSK.
	Reed-Solomon (Open Network):
	IDR modes:	225/205 for T1
		219/201 for E1 and IESS-310 mode,
		194/178 for T2 and E2
	IBS modes:	126/112
		219/201 for IESS-310 mode
	Reed-Solomon (Closed Network):
	220,200 outer code (transparent mode)
	225,205 outer code (transparent mode, EF Data compatible, V.35 scrambling)
	126,112 outer code (transparent mode, IBS parameters, D&I++ mode)
	219,201 outer code (transparent mode, IESS-310 parameters)
	200,180 outer code (EDMAC modes)
	Interleaver depth = 4 or 8 (Viterbi, depending on mode)
	Interleaver depth = 8 (Sequential)
	8-PSK/TCM Rate 2/3 (Trellis): Per IESS-310
	Turbo Product Codec, Low Rate (1st Generation) (Optional plug-in card):
	Rate 3/4 QPSK/OQPSK/8-PSK/16-QAM - 2 dimensional
	Rate 21/44 BPSK - 3 dimensional
	Rate 5/16 BPSK - 3 dimensional
	Turbo Product Codec, High Rate (2nd Generation) (Optional plug-in card):
	Rate 5/16 BPSK - 2 dimensional
	Rate 21/44 BPSK - 3 dimensional
	Rate 1/2 QPSK/OQPSK - 3 dimensional (exact Code Rate is actually 0.477)
	Rate 3/4 QPSK/OQPSK/8-PSK/16-QAM - 2 dimensional
	Rate 7/8 QPSK/OQPSK/8-PSK/16-QAM - 2 dimensional
	Rate 0.95 QPSK/OQPSK/8-PSK - 2 dimensional TPC (exact Code Rate is actually 0.944)
	Low Density Parity Check (LDPC) Codec (Optional plug-in card):
	Rate 1/2 BPSK/QPSK/OQPSK
	Rate 2/3 QPSK/OQPSK/8-PSK/8-QAM
	Rate 3/4 QPSK/OQPSK/8-PSK/8-QAM/16-QAM
Output frequency	CDM-600:52 - 88 MHz, 104 - 176 MHz, 100 Hz resolution – units manufactured prior to February 2005
	CDM-600(E):50 - 90 MHz, 100 - 180 MHz, 100 Hz resolution – units manufactured after February 2005
	Stability ±1.5 ppm, 0 to 50oC (32 to 122 oF) (standard stability internal reference)
	Stability ±0.02 ppm, 0 to 50oC (32 to 122 oF) (Optional High-stability internal reference)
Harmonics/spurious	Better than -55 dBC/4 kHz (typically <-60 dBC/4kHz) – measured from 25 to 400 MHz
Transmit on/off ratio	55 dB minimum
Output phase noise	< 0.480rms double sided, 100 Hz to 1MHz
	(minimum of 16 dB better overall than the INTELSAT IESS-308/309 requirement)
Output power	0 to -20 dBm, 0.1 dB steps - manual mode. See Automatic Uplink Power Control section also.
Power accuracy	±0.5 dB over frequency and temperature
Output impedance	50 and 75 Ω, front panel selectable
	21 dB minimum return loss
Output connector	BNC female
Clocking options	Internal, ±1.5ppm	or 0.02 ppm (SCT)
	External, locking over a ±100 ppm range (TT)
	Loop timing (Rx satellite clock) - supports asymmetric operation - Rx and Tx data rates do not need to be
	identical
	External Clock
External TX	By TTL 'low' signal or external contact closure - hardware function automatically over-rides processor
Carrier Off

15–2