Campbell-scientific AL200 ALERT2 Encoder, Modulator, and Sensor Interf Manuel d'utilisateur télécharger pdf (Page 16)

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.

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Campbell-scientific AL200 ALERT2 Encoder, Modulator, and Sensor Interf Manuel d'utilisateur Page 16