User manual GARMIN SL 40 COM

[. . . ] SL40 TM VHF Comm pilot's guide © 2005 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U. S. A. 913/397. 8200 or 800/800. 1020 Fax 913/397. 8282 Garmin (Europe) Ltd. [. . . ] Rotate the knob clockwise (CW) past the detent to turn the power on. Continuing to rotate the knob to the right increases speaker and headphone amplifier volume level. Rotate the knob to the left to reduce the volume level. Pull the knob out to disable automatic squelch. The SL40 may be installed to have the on/off switch disabled and to have power controlled from the avionics panel. Large and Small Knobs The dual concentric knobs on the right side of the SL40 are used to select frequencies or to view the features available within a function. Details are provided in the appropriate section. Buttons Five backlighted buttons allow you to access the functions in your SL40. Large (outer) and Small (inner) knobs Flip/Flop Button Flip/Flop (Arrows) Press the Flip/Flop button to switch between the active (left-most) and standby (rightmost) frequency. Switching between frequencies is disabled while you are transmitting. Getting Started Controls EC (Emergency Channel) Press the EC button to load the Emergency Channel (121. 500 MHz) as the standby frequency. The Monitor function is automatically enabled. MON (Monitor) Press the MON button to listen to the standby frequency. When the active frequency receives a signal, the unit will switch automatically to the active frequency. RCL (Recall) Press the RCL button to retrieve stored frequencies. MEM (Memory) Press the MEM button to store the displayed Standby frequency in memory. 3 Detailed Operation Getting Started Selecting Frequencies Detailed Operation This section introduces the basic operating details of the SL40 VHF Communications Transceiver. Volume, Power, and Squelch Control Power On/Off Turn the Power/Volume control clockwise past the OFF detent. The SL40 may be installed to be powered from the avionics panel so the on/off control will be disabled. Volume Turn the Power/Volume knob clockwise to increase the volume level and counterclockwise to decrease volume. Squelch Pull the Power/Volume knob out to disable automatic squelch. Selecting Frequencies New frequencies are first selected as a Standby frequency and then toggled to the Active side when desired. While viewing the frequency display, use the Large and Small knobs on the right side of the SL40 to select the desired frequency. 1. Turn the Large, outer knob to change the values in 1 MHz increments. The MHz selection range is between 118 and 136 in 1 MHz steps. Turn the Small, inner knob to change the values in 25 kHz increments. The kHz selection range is between 000 and 975 kHz in 25 kHz steps. Note that only two digits are displayed to the right of the decimal point. 119. 80 119. 80 Frequency selection with Large and Small knobs 119. 80 121. 50 s121. 50 s119. 80 Toggle Standby and Active frequencies with the Flip/Flop button Turn the Large and Small knobs clockwise to increase and counterclockwise to decrease the frequency values. [. . . ] Sidetone Level This function displays and adjusts the sidetone audio level. Turn the Small knob to change the value. Setting the value to 0 slaves the sidetone level to the volume control knob. Display Brightness As it arrives from the factory, the SL40 automatically adjusts its display brightness for the current lighting conditions. [. . . ]