Campbell Scientific AL200 ALERT2 Encoder, Modulator, and Sensor Interface User Manual

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AL200 ALERT2 Encoder, Modulator, and Sensor Interface

packet. This makes it possible to trace the path that a packet took

from its beginning to its destination.

Radio Settings

The default radio settings have been chosen to work well with Campbell

Scientific’s RF320 series (Ritron DTX-L series) radios. If using a different

type of radio, consult the manufacturer and apply the changes to the following

settings.

•

Set the

Radio Power Up Mode – (On Only With Data to TX) – This

determines when the radio will be powered on.

•

Set the

Radio Warm Up – (750) – This is the amount of time, in

milliseconds, that power will be applied to the external radio prior to

data transmission.

•

Set the

Carrier Only Time – (10) – This is the amount of time, in

milliseconds, that radio will be fed an unmodulated carrier.

•

Set the

AGC Time – (25) – This is the amount of time, in

milliseconds, that the radio will be fed a tone-modulated carrier.

•

Set the

Tail Time – (5) – This is the amount of time, in milliseconds,

an unmodulated carrier will be transmitted following data

transmission.

•

Set the

Modulation Voltage – (390) – This is the peak-to-peak

voltage level of the modulated signal that will be fed to the radio.

Value is expressed in millivolts.

•

Set the

Modulation Polarity – (Normal) – This is the polarity of the

modulated signal fed to the radio.

GPS Settings

•

Last GPS Fix – This is the data and time of the last successful GPS

fix obtained by the AL200.

•

Set the

GPS Power On Interval – (30) – This is how often the GPS

receiver will be powered on and an attempt to get a GPS fix will be

made. Value is expressed in minutes.

•

Set the

GPS On Max – (5) – This is the maximum amount of time, in

minutes, that the GPS receiver will be powered on without a GPS fix

being obtained.

Sensor Input Settings

•

Set the

Self Report Interval – (43,200,000 (12 hours)) – This is how

often the AL200 will transmit non-event triggered data. Value is

expressed in seconds.