EFJohnson LTR 98xx, High Tier manual Setting Squelch Control

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GENERAL OPERATION

Setting Squelch Control

NOTE: This procedure sets the squelch level used for conventional calls only. The squelch level for LTR calls is preset and not affected by this adjustment. For more information on the various operating modes, refer to page 38.

If conventional systems are programmed, the squelch level can be set if the FCN option switch is enabled. Proceed as follows:

1.Select a conventional system and then a group that is not busy. Take the microphone off-hook to enable monitoring.

2.Press the FCN switch and then rotate the Select switch as you would a normal squelch control. Rotate it counterclockwise until receiver noise is heard and then clockwise slightly past the point where the noise mutes. The squelch adjust mode is indicated by “SQUELCH” on the upper line of the display, and the relative squelch level is indicated by a bar graph on the bottom line.

3.To select the current level and exit this mode, press the Select switch. This also occurs automatically 2 seconds after no change is made or 8 seconds after no activity.

4.If both narrow and wide band channels are used, perform this adjust- ment on both types because separate settings are maintained.

NOTE: Some readjustment may be required if weak messages are not heard or unsquelching occurs when no messages are present.

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Contents High Tier Operating Manual Page Page Safety Information FCC Exposure Limits Limits For General Population/Uncontrolled ExposureFrequency Whip Model No Base Model No Table of Contents Table of Contents Quick Reference Guide Features General FeaturesControls and Display Front Panel ControlsMicrophone Push-To-Talk PTT Switch Not Shown Push-button on Rear Panel Jacks and Connectors Display Description Power-Up Sequence Determining Volume LevelGeneral Operation Backlight Operation Numeric Display ModeAlpha Tag Display Mode System/Group Display InformationSelect Mode Indication With Numeric Display Select Mode Indication With Alpha Tag DisplaySelecting the System and Group Setting Squelch Control Placing a Standard Call Standard CallsIntroduction LTR OperationConventional Operation Receiving a Standard CallTelephone Calls Placing Telephone CallsReceiving a Telephone Call General Features Landside-Originate CallsBank Select Call Indicator Emergency SwitchEncryption Encryption Indicator Function FCN SwitchHome System/Group Select Horn AlertPower Turn-Off Delay Option SelectProceed Clear-To-Talk Tone Stealth Mode Time-Out TimerReceive-Only Groups Tone Select Option Switches and Menu ModeOption Switches Transmitter Thermal FoldbackMenu Mode and Option Switch Functions SwitchMenu Mode Introduction Using Menu ModeSystem and Group Scan System and Group Scan Scan List Programming Scan Delay and Continue Timers Transmitting In The Scan ModeSystem and Group Scan LTR and Conventional Modes GeneralMonitoring Conventional Channels Before Transmitting LTR Features Standard and Telephone CallsCalls on Priority and Block ID Codes Transmit Inhibit Busy Queuing System SearchTranspond Conventional Features Monitor ModeTransmit Disable On Busy Talk-Around Call Guard Squelch Priority Group SamplingMiscellaneous Supervisory TonesMiscellaneous LTR Telephone Call Tones Display Messages Miscellaneous Menu Mode Messages Bright DIM OFFSystem Operator Programming Speaking Into MicrophonePreventing Battery Discharge Operation At Extended RangeLicensing Transceiver Service