Receive Sensitivity; Transmit Level; Return Loss - 3Jtech uModem Technical Document

11. Current Detect Specification AT Commands
Revise:
- Change all the naming of modem interrupt-related commands
AT#I<n> -> AT%I<n>
AT#S<n> -> AT%X<n>
- Allow the host to change the polling time via AT%X2
- The modem interrupts coming from "Line status change" and "Carrier
loss " may be identified by AT%I3
- The voltage setting and current setting sync with the table with
11.1 Protocols
Modulation: V90/V.34/V.32bis/V.32/V.22bis/V.23/V.21/Bell212A
Link layer: MNP3/4/5, V42/V42bis

11.2 Receive Sensitivity

-24 +/- 2 dBm

11.3 Transmit Level

Command: AT*P<n>
Parameter: <n>: 8 to 25, set the transmit power from -8 dBm to –25 dBm
Response: OK (i.e. Success)
ERROR (i.e. Invalid value)
Default value: -11 dBm

11.4 Return Loss

300 – 3400 Hz: > 10 dB
2003/6 From 3JTech Revision 1.0
Research & Development
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