With jumper out, AGC is preset to -38 dBm.
With jumper in, AGC is preset to -24 dBm.
With jumper in, CH fallback is 4800 bps (2400
baud) for a 9600 modem. With jumper out,
fallback is 7200 bps (2400 baud). The RATE
switch affects the fallback rate as shown below:
With jumper in, the normal CF drop (when the modem
is in receive train mode) is inhibited. Thus, CF
follows carrier detect. Inhibit A is
automatically in effect when the modem is in the
With jumper in, the receive data is clamped to an
EIA Space when CF is OFF. With jumper out, it is
clamped to a Mark.
With jumper in, CA ON forces CF OFF.
With jumper in, CC is always ON.
With jumper in, carrier is controlled by CA and
Carrier Control J
training is initiated on every rising edge of CA.
With jumper out, carrier is always ON unless
configured as a multipoint slave.
With jumper in, DD is disabled when CF is OFF.
CF Gate Jumper K