User manual

Dynamic Carrier Detect acts the same as in the T-96SR. The Carrier Sense level is set by selecting the “On” level. This is
the RSSI (Receive Signal Strength Indication) or signal strength required to open the squelch setting in the receiver. The
Carrier Sense “Off” level is set automatically to 5 dBm below the “On” level. (See the preceding figure.)
Important: When all parameters are selected and verified to be correct, click Save Changes at the bottom of the Link
Configuration window to save the changes. The Link Configuration window will close.
Click User Port Configuration in the User Configuration window to display the User Port pin-out configuration. (See the
following figure.)
Figure 52 User Port Configuration window
In Loader mode, the User Port controls the analog radio functions. Pin 4 can be programmed to provide a Carrier
Detect (CD) output 0-5 VDC or 5-0 VDC. Pin 4 can also be programmed to output the receiver RSSI level as a DC voltage
allowing it to be used for system monitoring and control (see the preceding figure).
Note: For this modem application, Pin 4 should be set for CD output. DC polarity should not be inverted as the DL-3282
modem is expecting to see a -0-5 VDC change when an RF signal is present.
The following table shows user interface pin functions in reference to the DL-3400 wiring and cable PN 023-3410-109
wire color code.
Pin 4 is
selectable for
CD or RSSI
output mode.
Guardian™ Serial Modem or Analog Radio for Licensed Spectrum PN 001-5006-000 Rev. 3 | Page 75