Telenetics MIU202T Modem manual d LINE DIAGNOSTICS, Adjustments…

(d)LINE DIAGNOSTICS

(i)Typical modem configuration for 4-wirePoint-to-Pointsystem…

Switch 1 = ON (TxA = 0dBm)

Switch 3 = ON (RxA = -33dBm)

Switch 4 = OFF (RTS/CTS = 1ms)

Switch 5 = OFF (RTS/CTS = 1ms)

Switch 6 = ON (Constant Carrier mode).

Switch 7 = OFF (4-Wire)

Switch 8 = ON (Line Termination = 600 ohms)

Switch 9 = OFF (Soft Carrier = OFF)

(ii) Typical modem configuration for 4-wireMulti-Pointsystem…

Switch 1 = ON (TxA = 0dBm)

Switch 3 = ON (RxA = -33dBm)

Switch 4 = OFF (RTS/CTS = 1ms)

Switch 5 = OFF (RTS/CTS = 1ms)

Switch 6 = ON (Constant Carrier mode).

Switch 7 = OFF (4-Wire)

Switch 8 = ON (Line Termination = 600 ohms)

Switch 9 = OFF (Soft Carrier = OFF)

Adjustments…

In a network with high line loss (greater than 16dB) change Switch 3 (RxA) to OFF (-43dBm).

If there are conditions that can cause cross-talk (TxA leaking into RxA path) set Switch 1 (TxA) to OFF (-10dBm).

Note that noise level should be –50dBm or lower for most FSK operation (signal-to-noise ratio of 15dB or higher)

MIU202T Installation, Operation & Diagnostics Edition: December 28, 2000 Page 19