EFJohnson 002-9800-401 manual Monitoring Conventional Channels Before Transmitting

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MULTI-NET, LTR, AND CONVENTIONAL MODES

Monitoring Conventional Channels Before Transmitting

Regulations require that the channel be monitored before transmit- ting to make sure that it is not being used by someone else. If you were to transmit when someone else is talking, you would probably disrupt their conversation. As previously stated, monitoring is performed automati- cally in the Multi-Net and LTR modes. In the conventional mode, it must be performed automatically or manually as follows.

Automatic Channel Monitoring

If the selected group is programmed for the Transmit Disable On Busy feature, monitoring is performed automatically. Refer to page 51 for more information on this feature.

Manual Channel Monitoring

If the Transmit Disable On Busy feature is not used, monitoring must be performed manually as follows:

Busy Indicator - With scanning disabled and the squelch control adjusted as described on page 18, note if the indicator on the front panel is green. If it is, a signal has been detected on the selected system (channel) and you should not transmit a message until it turns off.

Monitor Mode - There may be times when the busy indication is on even though no one is using the channel. Monitoring should then be performed using the monitor mode. This mode is enabled by taking the microphone off-hook (unless off-hook detection has been disabled by programming). The monitor mode temporarily disables Call Guard squelch (see descrip- tion on page 52) and scanning so that all messages on the channel are heard. The monitor mode is indicated by in the display as shown in the following illustration. The monitor mode can also be enabled by the MON or CG option switch if it is programmed. Refer to the monitor mode description on page 50 for more information.

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Contents Operating Manual Safety Information Page FCC Exposure Limits FCC Limits for Maximum Permissible Exposure MPEFrequency Whip Model No Base Model No Table of Contents Table of Contents Table of Contents Quick Reference Guide LTR Features General FeaturesMulti-Net Features Conventional FeaturesControls and Display Front Panel ControlsControls and Display Rear Panel Jacks and Connectors Display Description Power-Up Sequence Determining Volume LevelGeneral Operation Numeric Display Mode Backlight OperationSystem/Group Display Information Alpha Tag Display Mode Selecting the System and Group Select Mode Indication With Numeric DisplaySelect Mode Indication With Alpha Tag Display Setting Squelch ControlPlacing a Standard Call Standard CallsIntroduction Multi-Net and LTR OperationConventional Operation Receiving a Standard CallTelephone Calls Other Special Calls Placing Telephone CallsBusy and Out-Of-Range Conditions Receiving a Telephone Call Placing Other Multi-Net Special CallsReceiving Other Multi-Net Special Calls General Features Landside-Originate CallsBank Select Call Indicator Emergency SwitchEncryption Indicator EncryptionFunction FCN Switch Home System/Group SelectHorn Alert Option Select Power Turn-Off Delay Proceed Clear-To-Talk ToneStealth Mode Time-Out TimerTone Select Option Switches and Menu ModeOption Switches Transmitter Thermal FoldbackMenu Mode Introduction Using Menu ModeMenu Mode and Option Switch Functions SwitchSystem and Group Scan System and Group Scan Single and Multiple Site Scan Scan List ProgrammingScan Delay and Continue Timers Transmitting In The Scan Mode MULTI-NET, LTR, Conventional Modes GeneralConventional Operation Monitoring Conventional Channels Before Transmitting MULTI-NET Features Standard and Special CallsBusy Queuing Multi-Net Roaming Auto-Registration Status Select Mode Selected Status Message Transmitting Status MessagesCaller Identification Calls on Priority and Block ID CodesTransmit Inhibit LTR Features Standard and Telephone CallsBusy Queuing LTR System Search TranspondConventional Features Monitor ModePriority and Block ID Codes Transmit Disable On Busy Receive-Only GroupsTalk-Around Call Guard SquelchPriority Group Sampling Miscellaneous Supervisory TonesMiscellaneous Multi-Net Telephone Call Tones LTR Telephone Call TonesDisplay Messages Miscellaneous Miscellaneous Menu Mode Messages Bright DIM OFFSystem Operator Programming Speaking Into MicrophoneOperation At Extended Range Preventing Battery Discharge Transceiver ServiceLicensing Miscellaneous