CalAmp GUARDIAN - Page 72

Figure 43 User Configuration – Loader Mode
- The PTT Watchdog performs the same function as in the T-96SR. This can be adjusted or left at the factory default.
Note: This feature is not available in the DL-2400 transceiver.
- Information and real-time diagnostics are available in this window.
- CWID is a feature not available in the DL-3400. Station or License call signs can be transmitted at selected intervals.
This feature is used when the analog system shares a “voice channel” with another system and is required to
identify itself using Morse code.
- The Guardian Rx and Tx audio levels are preset to match the DL-3400 factory levels. These can be adjusted as
necessary for the user’s application. Refer to Chapter 5 Guardian Field Programming Software in this User Manual
for additional information.
- CSMA (Carrier Sense Multiple Access) is a feature available in the Guardian that is not available in the DL-3400.
o This feature allows the radio to monitor the RF channel for activity.
o There are two modes to select from when CSMA mode is enabled:
• No Tx when the radio/modem is receiving valid user data.
• No Tx when the radio/Modem is receiving an RF carrier.
• See the Loader mode Figure that follows.
- There is a feature of the Guardian that allows the radio to be used as a modem (T-96SR compatible) or to be used as
an analog radio (DL-3400 compatible). For this application only the Loader mode will be used.
Select Loader
mode for
DL-3400
analog
operation.
Rx and Tx audio levels can
be adjusted as necessary.
Factory defaults are set to
equal the DL-3400 factory
settings.
PTT Watchdog
is a feature not
available in the
DL-3400.
Enable CSMA to
monitor RF
channel for
activity before
Tx.
Real time
Diagnostics are
now available.
Click to view
User Port
Pin-out.
Guardian™ Serial Modem or Analog Radio for Licensed Spectrum PN 001-5006-000 Rev. 3 | Page 65