User manual

LINK CONFIGURATION
Click Link Configuration to advance to the modem settings. This is the window where you set the RF channel
frequencies and Loader settings. See the following figure.
Figure 44 Link Configuration – Loader Mode, default tab
Unlike the DL-3400 where all eight channels were programmed one channel at a time, the Guardian has a Default tab
where you can select settings that will be default selections for all eight link channels, making it easy to set all eight
channels simultaneously (as shown in the previous figure).
- Using the information gathered from the DL-3400 programming, set the RF Link information to match the system
parameters.
- Channel bandwidth is now selectable for either 25 kHz or 12.5 kHz.
- Set the Tx Output Power to the desired power level: 1-10 Watts.
- Select the Rx and Tx Filter Mode to match the DL-3400 Rx/Tx Audio Mode.
Refer to the parameters gathered from the DL-3400 programming to set the Loader Settings. Set Squelch, PTT Polarity,
Rx/Tx audio impedance to match the DL-3400 system settings.
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 that is set using the slider control.
Default setting
will set all eight
channels
simultaneously.
Set Parameters
to match
existing DL-3400
system.
Match the
Loader Settings
to the DL-3400
system settings.
Set the RX/TX Filter
Mode to match the
DL-3400 audio mode
settings.
Guardian™ Serial Modem or Analog Radio for Licensed Spectrum PN 001-5006-000 Rev. 3 | Page 66