Furuno GD-1700C - Manual (Page 205)

5. CUSTOMIZING YOUR UNIT
5-35
5. Select function desired with the cursor pad.
6. Press the ENTER soft key or the [ENTER] knob to register your selection.
7. Press the [MENU] key to close the menu.
Sounder function keys
Menu Item Function Function Key Label
OFF Assigns no function.
MOD: AUTO MODE Display automatic mode selection window. MOD
GHF: GAIN - HF Displays high frequency gain adjustment
window. GHF
GLF: GAIN - LF Displays low frequency gain adjustment
window. GLF
SFT: SHIFT Shifts range in manual operation. SFT
NL: NOISE LIMITER Suppresses noise. NL
CLT: CLUTTER Suppresses clutter. CLT
WMK: WHITE MARKER Sets white marker (color model only). WMK
HUE: HUE Sets hue (color model only). HUE
SLV: SIGNAL LEVEL Erases weak signals. SLV
PA: PICTURE ADV Sets picture advance speed. PA
TG: TEMP. GRAPH Turns temperature graph on/off. TG
TVH: TVG - HF Sets TVG for high frequency. TVH
TVL: TVG - LF Sets TVG for low frequency. TVL
EOH: OFFSET - HF Offsets echo strength for high frequency. EOH
EOL: OFFSET - LF Offsets echo strength for low frequency. EOL
SMT: SMOOTHING Sets echo smoothing rate. SMZ
ZMR: ZOOM RANGE Sets zoom range. ZMR
BLR: B/L RANGE Sets bottom lock range for bottom-lock
display. BLR
TLL: TLL OUTPUT Outputs current position to plotter. Also
inscribes line on sounder and registers
position as a waypoint on plotter. TLL
SSR: SNDR SOURCE Selects source for sounder data. SSR
DBX: D. BOX ON/OFF Turns data boxes on/off. DBX
CHG: CHANGE CNTRL Switches control in combination display. CHG
Note:
To use CHANGE CNTRL, set it on all displays, with the same soft key number.