CalAmp GUARDIAN User Manual Page 10

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1.3 LINK CONFIGURATIONS
The Guardian allows you to program up to eight (8) different link configurations. You may choose which configuration
you are using by selecting the appropriate link configuration pins. Since the pins are internally pulled High, a No
Connect (NC) will result in a High state. Tie the pin to Ground (GND) to pull it Low. See Table 3 for the User Interface
Port.
Table 1 Link Configurations
Link Configuration
(internally pulled high)
(internally pulled high)
Configuration Select 3
(internally pulled high)
1 GND
GND
GND
1
2 NC
GND
GND
1
3 GND
NC
GND
1
4
GND
1
5 GND
GND
NC
2
6 NC
GND
NC
2
7 GND
NC
NC
2
8
(default when no
connections are made)
NC
NC
NC
2
1
Tie the pin to Ground (GND) (Pin 5 of the User Connector) to make the pin low.
2
The pin should be Not Connected (NC). The internal pull-up makes it high.
The configurations allow you to select transmit frequencies, receive frequencies, power levels, bandwidths, RF Port
configurations, Com Port configurations, Online Diagnostics and more. You may choose to program all of your units the
same, and let the User Connector at the install site select the proper configuration for that install.
For instance, Site A transmits at 450.05 MHz and receives at 456.05 MHz, and site B transmits at 456.05 MHz and
receives at 450.05 MHz. You can program Link Configuration 1 to transmit at 450.05 MHz and receive at 456.05 MHz.
You program Link Configuration 2 to transmit at 456.05 MHz and receive at 450.05 MHz. You program the same
configurations into both units. The User Port connector at Site A is wired to Link Configuration 1, and the User Port
connector at Site B is wired to Link Configuration 2. If a unit fails somewhere along the line, a replacement unit with the
same configuration can be plugged into either site. Link Configurations simplify radio programming and site installation.
The user can use the Default Configuration to speed up configuration programming. For instance, Site C requires an RS-
232 connection, and Site D requires RS-485. All other parameters are the same for the install. By programming the
desired Rx Frequency, Tx Frequency, Tx Power, etc. in the Default Configuration and then accepting default values for
each Link Configuration, the User only needs to set the parameters that are different between Link Configurations. This
programming by exception can save time in system configuration. Whatever you want ALL units to have, program in
the Default Configuration. Program only the differences in the Link Configurations.
Guardian™ Serial Modem or Analog Radio for Licensed Spectrum PN 001-5006-000 Rev. 3 | Page 2
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