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MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 20
(d) LINE DIAGNOSTICS
(i) Typical modem configuration for 4-wire Point-to-Point system…
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-wire Multi-Point system…
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)