Radio Shack PRO-90 Channel Activity Indicators, fm Page 40 Wednesday, August 4, 1999 306 PM

20-520.fm Page 40 Wednesday, August 4, 1999 3:06 PM

CHANNEL ACTIVITY INDICATORS

Your scanner has 20 channel activity indicators (bars) which show the activity taking place on a trunked sys- tem. You can see how many frequencies are being used and generally monitor how much communication traffic is occurring.

Each frequency you store in a trunking bank has a corre- sponding activity indicator. However, since there are only 20 indicators, but you can store up to 30 frequen- cies, some indicators might indicate more than one fre- quency if the trunked system you are scanning has more than 20 channels.

•The indicator that remains on steadily even when there are no current transmissions represents the frequency being used as the data channel.

•The indicator that flashes when an ID appears rep- resents the frequency being used by the radio you are currently hearing.

•If an indicator turns on but you do not hear a conver- sation, the channel is probably being used for a tele- phone interconnect call or a private call, or the indicator might be a locked-out ID. Your scanner does not monitor these types of calls.

•If the scanner is holding on an ID which is not active, the other activity indicators turn on and off as other groups use the system.

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