Installation
17
User’s Manual - DSP19.2 Fast Poll Modem
from participating in a remote digital loopback with another modem. Switch S1-9 does not
prevent the modem from sending a remote digital loopback request to a remote modem.
S1-10
−
Reserved (Test Only)
y
S1-10 = must be OFF
Switch S1-10 must be in the OFF position for normal operation. It is reserved for factory
testing only.
S2-1 through S2-3
−
Transmit Level
Switches S2-1 through S2-3 adjust the modem’s transmit level. Table 2-5 shows the transmit
levels you can select using these switches.
Table 2-3. Transmit Levels
S2-1 through S2-3 Switch Settings
Transmit Level
S2-1
S2-2
S2-3
0 dBm
OFF
OFF
OFF
−
2 dBm
OFF
OFF
ON
−
4 dBm
OFF ON
OFF
−
6 dBm
OFF
ON
ON
−
8 dBm
ON OFF OFF
−
10 dBm
ON
OFF
ON
−
12 dBm
ON ON OFF
+3 dBm
ON
ON
ON
S2-4
−
Receiver Dynamic Range
y
S2-4 ON =
−
10 to
−
43 dBm
y
S2-4 OFF = +3 to
−
30 dBm (
default
)
For short distances or to select a strong receive signal, set S2-4 to OFF. For a long-distance
cable or low receive signal level, set S2-4 to ON (
−
43 dBm).
