CalAmp GUARDIAN Manuel d'utilisateur télécharger pdf (Page 42)

Figure 22 User Port Configuration Window – Modem Mode

Modem User Port Configuration is used to configure the Guardian’s User Port when configured in Modem Mode. There

are 8 pins on the Guardian User Port. 7 pins are available to the user and can be programmed with for different

functions. Pin 5 is always ground and cannot be programmed.

Note: Pins 1 - 4 may be reserved for RS-422 / RS-485 serial port functions if the active RF Link Serial Standard is

programmed to RS-422 or RS-485 in the Link Configuration window.

• Audio Out: Pin will be programmed as an Audio Output. Modem audio will be output from the pin.

• Analog In: Pin will be programmed as an Analog Input. Pin is connected to an analog to digital converter (ADC).

• Analog Out: Pin will be programmed as an Analog Output. Pin is connected to a digital to analog converter (DAC).

• Digital In: Pin will be programmed as a Digital Input. Logic level of pin can be read by the Guardian.

• Digital Out: Pin will be programmed as a Digital Output. Guardian can output a logic level at the programmed I/O

Port Voltage.

• RSSI Out: Pin will be programmed as a Receive Signal Strength Indicator Output. A voltage representing the strength

of the Guardian’s received RF signal will be output from the pin.

• CD Out: Pin will be programmed as a Carrier Detect Output. This pin will be asserted whenever the Carrier Detect

conditions are met that were programmed in the Link Configuration window. The pin is normally Active High, but

can be made Active Low by checking the Inverted Carrier Detect check box on the Link Configuration window.

• PTT In: Pin will be programmed as a Push to Talk (PTT) Input that will cause the Guardian to begin transmitting. PTT

In is normally Active Low, but can be changed to Active High by checking the Inverted PTT check box on the Link

Configuration window.

Guardian™ Serial Modem or Analog Radio for Licensed Spectrum PN 001-5006-000 Rev. 3 | Page 34

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CalAmp GUARDIAN Manuel d'utilisateur Page 42