EFJohnson 8500 manual Conventional Mode Operation, Monitoring Before Transmitting

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CONVENTIONAL MODE OPERATION

CONVENTIONAL MODE OPERATION

Monitoring Before Transmitting

Before transmitting in the conventional mode, regulations require that you monitor the channel to make sure that it is not being used by someone else. If you were to transmit while someone else was talking on the channel, you would probably disrupt their conversation.

The simplest way to monitor the channel is to note if “BUSY” is indicated in the lower part of the display. If it is not, the channel is not being used and you can transmit your message. There may be periods when this indication is displayed and no one is using the channel. There- fore, other methods to monitor the channel are as follows:

If Call Guard squelch is not used on the channel (refer to description page 31), monitoring can be performed by simply listening for someone talking before pressing the push-to-talk switch.

If Call Guard squelch is programmed, it must be disabled so that all calls can be heard. To disable Call Guard squelch, press the Auxiliary switch on the side of the transceiver. This turns on the monitor mode which is indicated by “MON” in the lower part of the display. To re- enable Call Guard squelch, press the Auxiliary switch again so that “MON” is not displayed.

Transmit Disable When Busy

The transceiver can be programmed so that the Transmit Disable When Busy feature automatically disables the transmitter if the channel is busy (“BUSY” indicated in the lower part of the display). If the channel is busy with this feature programmed and the push-to-talk switch is pressed, the transmitter does not turn on and the channel can be moni- tored for as long as the push-to-talk switch is pressed.

In some systems, “BUSY” may be indicated and the transmitter disabled even though no one is talking. In this case, the transmitter can be

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Contents Series Safety Information Battery Recycling Information Page Quick Reference Guide Page Table of Contents Operation with Optional Remote Control Unit Controls Front Panel ControlsControls Optional Keys for Telephone Calls Display Information Front Panel DisplayDisplay Information Placing a Standard Call Standard CallsIntroduction Receiving a Standard CallSpecial Calls Placing a Special CallReceiving a Special Call Additional Phone Mode Information Landside-Originated CallsDialing The Number Supervisory Tones Intercept ToneClear-To-Talk Tone Key Press ToneConfirmation Tone End Call Tone System ScanCall Proceed Tone Proceed Dialing ToneScan Resume Delay Transmitting In ScanSystem and Group Lockout Scanning Conventional Systems Other FeaturesScanning Multi-Net Systems Clear-To-TalkTime-Out Timer Group ScanCall Indicator RTN Return KeyEmergency Button Keypad Disable Transmit InhibitPriority Calls Key Press Tone Disable High/Low Power SelectSupervisory Tones MULTI-NET and Conventional ModesChannel Monitoring Group SelectConventional Mode Operation Transmit Disable When BusyMonitoring Before Transmitting Receive-Only and Talk-Around Channels Call Guard SquelchOperation with Optional Remote Control Unit Control Unit Controls Miscellaneous Operating Information Operation with Optional Remote Control Unit Miscellaneous Information Sending Status InformationAuto-Registration Busy Queuing System Operator ProgrammingSetting Volume Level Display MessagesRechargeable Battery Pack Battery PackTransceiver Speaking Into Microphone Operation At Extended RangeFCC Licensing Transceiver Service Intrinsically Safe ClassificationClassification of Areas Division Classification of Atmospheres Class/ GroupApproved
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