TM  1-1520-240-10 3-2-20            CONTROLS/ INDICATOR FUNCTION General Editing Select desired channel and press the EDIT line-select switch. Use the CURSOR switches to position cursor under character position or data field to be edited. Use VALUE switches to change the character or data field to desired value. If available, the data setup can be modi- fied by pressing the DATA line-select switch in the EDIT screen, using the VALUE switches to scroll through the list of modem set configura- tion. Press theRTN line-se- lect switch when all changes are complete to store the changes and return to normal operation mode. Transmit Position Report Set function switch to T/R and mode switch to proper mode. Press the POSN line select switch. (NOTE: POSN line-select is available only if configuration data indicates GPS is installed). Manual Operation Set function switch to T/R and mode switch to MAN. Use - SQL switch to set squelch to 0. Adjust VOL control to comfortable listen- ing level. Use SQL + switch to set squelch to 1, the opti- mum for manual mode. If ra- dio breaks in and out of squelch, increase as requi- red. Set to desired channel. Press microphone PTT switch, wait until tune tone stops and begin communica- tions. When PTT switch is pressed, the XMT frequency is displayed. Preset Operation Set function switch to T/R and mode switch to PRE. Use - SQL switch to set squelch to 0. Adjust VOL control for comfortable listen- ing level. Use SQL + switch to set squelch to position 1, the optimum setting for pre- set mode. If radio breaks in and out of squelch, increase CONTROLS/ INDICATOR FUNCTION as required. Set to desired channel. Press microphone PTT switch, wait until tune tone stops and begin com- munications. When PTT switch is pressed, the XMT frequency is displayed. Normal ALE Commu- nication Set function switch to T/R and mode switch to ALE. (NOTE: If the selected net is configured for link protection but does not have accurate time, SYNC instead of POSN will appear on display, line 2 right side along with an UN- SYNC advisory at bottom of screen.  An ALE link protec- tion time sync needs to be performed. If ALE data is not loaded for the selected scan list, a CHANNEL INOP advi- sory is displayed). Use - SQL + switch too set squelch to TONE. Adjust VOL for com- fortable listening level. Use - SQL + switch to set squelch to 0. Headset is muted until a link is established. If channel is noisy, adjust squelch. High- er squelch levels are not rec- ommended for ALE mode of operation. Normal ALE Communication Receiving When ALE call is received INCOMING CALL is dis- played with the address field displaying xcaller’s ALE ad- dress. LINKED is displayed and short gong tone sounds when an ALE link is establi- shed. Communication can now begin. Proper protocol is for calling station to make first transmission. Normal ALE Communication - Transmitting Select ALE address to be called by doing a, b, or c: a. Set channel/net switch to desired prepro- grammed net. b. Use VALUE switch to scroll through and select preprogrammed address.