Cisco EPC3925 User Manual download pdf (Page 8)

Data Sheet

Specification

Value

RF Downstream

Operating Frequency

Range

108 to 1002 MHz

Tuner Frequency Range

108 to 1002 MHz

Tuner

(2) Frequency agile block tuners, 32 MHz bandpass each

Demodulation

8 demodulators, 4 per tuner, each demodulator; 64 QAM or 256 QAM

Maximum Data Rate

8 downstream channels, each 8 MHz channel:

●

55.62 Mbps for 256 QAM and 41.71 Mbps for 64 QAM

Bandwidth

8 or 6 MHz

Operating Level Range

+43 to +73 dBµV for 64 QAM

+47 to +77 dBµV for 256 QAM

Input Impedance

75 ohms

RF Upstream

Operating Frequency

Range

5 to 65 MHz

Transmitter Frequency

Range

5 to 65 MHz

Upstream Transmission

4 upstream channels

Modulation

QPSK, 8 QAM, 16 QAM, 32 QAM, 64 QAM / ATDMA, 128 QAM / SCDMA

Maximum Data Rate per

channel

Channel Raw

Modulation Bandwidth (MHz) Data Rate (Mbps)

QPSK 1.6 2.56

16 QAM 1.6 5.12

QPSK 3.2 5.12

16 QAM 3.2 10.2

32 QAM 3.2 12.8

64 QAM 3.2 15.4

16 QAM 6.4 20.5

32 QAM 6.4 25.6

64 QAM 6.4 30.7

Bandwidth

200 kHz to 6.4 MHz

Maximum Operating Level

TDMA

SCDMA

Modulation One Channel 2 Channels 3 or 4 Channels

QPSK +121 dBµV +118 dBµV +115 dBµV

8 QAM +118 dBµV +115 dBµV +112 dBµV

16 QAM +118 dBµV +115 dBµV +112 dBµV

32 QAM +117 dBµV +114 dBµV +111 dBµV

64 QAM +117 dBµV +114 dBµV +111 dBµV

QPSK +116 dBµV +113 dBµV +113 dBµV

8 QAM +116 dBµV +113 dBµV +113 dBµV

16 QAM +116 dBµV +113 dBµV +113 dBµV

32 QAM +116 dBµV +113 dBµV +113 dBµV

64 QAM +116 dBµV +113 dBµV +113 dBµV

128 QAM +116 dBµV +113 dBµV +113 dBµV

Electrical

Input Voltage

15 VDC

Power Consumption

(modem module)

~ 17 Watts

Data Ports

GigE (Auto-negotiate with Auto-MDIX): RJ-45 Ethernet (4)

USB 2.0: USB Type 2 (1)

Female F-Type

Output Impedance

75 ohms

1 2 3 4 5 6 7 8 9 10 11 12

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Cisco EPC3925 User Manual Page 8

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