Kathrein DCM 32, DCM 42 I manual Specifications, Downstream

Specifications

	The DCM 32 corresponds to the specification
	MCNS DOCSIS 1.0,1.1, 2.0. The DCM 42 corre-
	sponds to the specification EURODOCSIS
	1.0,1.1, 2.0.
Downstream
Demodulation	64 QAM / 256 QAM
Input level	-15 dBmV to +15 dBmV
Input impedance	75 Ω
Return loss	>6 dB from 88 MHz to 860 MHz
DCM 32
Physical speed	30 Mb/s (64 QAM) / 43 Mb/s (256 QAM)
Error correction	Reed Solomon + Trellis (ITU-T J.83 Annex B)
Frequency range	88 MHz to 860 MHz (edge frequencies) in
	62.5 kHz steps
Band width	6 MHz
DCM 42 / 42 I
Physical speed	42 Mb/s (64 QAM) / 56 Mb/s (256 QAM)
Error correction	Reed Solomon (ITU-T J.83 Annex A)
Frequency range	108 MHz to 860 MHz (edge frequencies) in
	250 kHz steps
Band width	8 MHz
Upstream
Access method	TDMA, S-CDMA (DOCSIS 2.0)
Modulation	QPSK, 8-,16-, 32- and 64QAM, 128QAM with S-CDMA only
Modulationsrate	TDMA: 160, 320, 640, 1280, 2560 und 5120 kHz
	S-CDMA: 1280, 2560 and 5120 kHz
Bandwidth	TDMA: 200, 400, 800, 1600, 3200 and 6400 kHz
	S-CDMA: 1600, 3200 and 6400 kHz
Output level	TDMA:
	+8 dBmV to 53 dBmV (32QAM, 64QAM)
	+8 dBmV to 55 dBmV (8QAM, 16QAM)
	+8 dBmV to 58 dBmV (QPSK)
	S-CDMA:
	+8 dBmV to 53 dBmV (all Modulations)
Max. Bitrate	30 Mbit/s (with A-TDMA- or S-CDMA)
Error correction	Reed Solomon

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