User`s manual

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).