Cermetek CH2124, Руководство пользователя

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Cermetek Microelectronics, Inc. High Speed Internet Modem Family
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2005 Cermetek Microelectronics, Inc. Page 17 Document No. 607-0017 Revision I1 (05/05)
Table 7A. CH2124 iModem Electrical Specifications.
Parameter Minimum Typical Maximum Units Comments
Off Hook Impedance 20 Mohm
Trans Hybrid Loss 25 dB 600 Ohm, RXA, TXA
Ring Voltage Loop 15 V
PP
On 48VDC line voltage
for sustained periods
Line Loop Current - (Off
Hook)
20 60 mA
Return Loss @ 1000 Hz 15 dB 600 Ohm
Ring Frequencies 18 20 30 Hz
Receiver Insertion Gain -0.5 0.0 +0.5 dB
Transmit Power -9.5 dBm 600 Ohm- Data Mode
First Character After Reset
See Note 1
10.0 sec Delay
Inter Character Delay 20 50 msec Between all command
characters
Command Delay 100 200 msec Between all AT
commands
Minimum Reset Pulse 10 msec If user supplied
Note: 1. All CH2124 iModem devices perform an internal self-check upon reset and will not respond to
commands issued during this self-check sequence.
Table 7B. CH2160 iModem Electrical Specifications.
Parameter Minimum Typical Maximum Units Comments
Off Hook Impedance 20 Mohm
Trans Hybrid Loss 25 dB 600 Ohm, RXA, TXA
Ring Voltage Loop 35 V
PP
On 48VDC line voltage
for sustained periods
Line Loop Current - (Off
Hook)
20 100 mA
Return Loss @ 1000 Hz 15 dB 600 Ohm
Ring Frequencies 20 Hz
Receiver Insertion Gain -0.5 0.0 +0.5 dB
Transmit Power -9.5 dBm 600 Ohm- Data Mode
First Character After Reset
See Note 1
10.0 sec Delay
Inter Character Delay 20 50 msec Between all command
characters
Command Delay 100 200 msec Between all AT
commands
Minimum Reset Pulse 10 msec If user supplied
Note: 1. All CH2160 iModem devices perform an internal self-check upon reset and will not respond to
commands issued during this self-check sequence.