CalAmp GUARDIAN User Manual - page 8
Guardian Manual 001-5006-000 Rev 0
8 |
P a g e
model provide a receive antenna connector allowing for unique customer applications requiring additional receive
filtering, external PA(s), and other options.
Long Range. Narrowband configurations allow better coverage over harsh terrain.
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 1-2
for the
User port interface.
Link Configuration
Configuration Select 1
(internally pulled high)
Configuration Select 2
(internally pulled high)
Configuration Select 3
(internally pulled high)
1
GND
(1)
GND
(1)
GND
(1)
2
NC
(2)
GND
(1)
GND
(1)
3
GND
(1)
NC
(2)
GND
(1)
4
NC
(2)
NC
(2)
GND
(1)
5
GND
(1)
GND
(1)
NC
(2)
6
NC
(2)
GND
(1)
NC
(2)
7
GND
(1)
NC
(2)
NC
(2)
8
(default when no
connections are made)
NC
(2)
NC
(2)
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 defaulting
each Link Configuration to the Default, 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.