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Using SignalTrack

USING A RADIO MODEM

The radio modem at the Network Control Site and the mobiles must be tuned to the same

frequency. SignalTrack acts as the master controller to transmit data from SignalTrack to the

mobiles and to coordinate the response from the mobiles so that no two mobiles transmit at the

same time. The networking section contains further details on networking mobile sites. To enable

SignalTrack at the Network Control site to manage these connections, first select Options... from

the Setup menu and click on the Radio Modem tab as shown below.

Click the Enabled check box and select the radio modem COM port. Enter the frequency band

used by the radio modem. The Slot Time is the time allocated for each mobile site to transmit its

data to the network control site running SignalTrack. Increase this time if you are experiencing data

loss from the mobiles. This may happen if you are using radio modems that have significant setup

times. The Polling Interval defines the amount of time between pulses used to trigger mobile

transmissions when direction finding within one octave of the radio modem frequency. This allows

the user to use the direction finder on the same band as the radio modem. If the frequency of the

direction finder network is greater than one octave away from the radio modem frequencies then

SignalTrack queries the mobiles for data as fast as possible.

Normally the Network Control Site is manned and is the controller of the frequency that the

network is tuned to. The mobiles can request a frequency change but the Network Control Site

operator must acknowledge and accept the request. However, in some instances you may want to

allow a mobile site to control the frequency. To allow a mobile to have control of the frequency,

check the Allow Remotes to Change Network Frequency check box. When this option is

enabled any mobile or other remote site in the network may change the network frequency.

To enable SignalTrack in the mobiles to send data to the Network Control site you must configure

SignalTrack as a slave as discussed below.

The system has been tested using DataRadio IntegraTR radio modems which are recommended for

use with this system.

Figure 35: Enable the Radio Modem to Communicate With Networked Mobiles and Remote Sites

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AOR AR5001D Guida Utente Pagina 63