Yaesu FT-991 Operating Manual page 113

Positioning Using an External GPS Device
A YAESU FT1DR/DE, FTM-400DR/DE or a commercially available GPS receiver/antenna may be connected to the
GPS/CAT jack on the rear panel.
The GPS/CAT jack connector is illustrated below.
c Ft1dr/de
onnecting to the
FT1DR/DE
c FtM-400dr/de
onnecting to the
FTM-400DR/DE
FTM-400DR/DE
1. Press the front panel ON/OFF switch to turn the
transceiver off.
2. Plug the connector of the external device into the
GPS/CAT jack on the rear
3. Press and hold in the front panel ON/OFF switch to
turn the transceiver on.
4. Press the MENU(SETUP) button to enter the Menu
mode.
5. Rotate the MULTI knob to select Menu item "028
GPS/232C SELECT".
6. Touch [ SELECT] on the LCD, then rotate the
MULTI knob to set this Menu item to "GPS" (the de-
fault setting is "GPS").
7. Touch [ ENTER ] on the LCD to save the new set-
ting.
8. Press the MENU(SETUP) button or touch [ BACK ]
on the LCD to exit to normal operation.
When the external
device acquires
t h r e e o r m o r e
satellites, the "
" icon will be dis-
played on the top
right of the screen.
FT-991 O
peraTing
u
sinG the
p
oSitioning
(CT-169 Option)
(CT-163 Option)
(CT-167 Option)
panel.
M
anual
Gps f
u gpS
Sing
GPS/CAT Jack

 TXD (Serial data output) (FT1DR/DE  FT-991)
 RXD (Serial data input) (FT1DR/DE  FT-991)
 GND
GPS/CAT Jack

 TXD (Serial data output) (FTM-400DR/DE  FT-991)
 RXD (Serial data input)(FTM-400DR/DE  FT-991)
 GND



 GND (Heavy black line)
 TXD (Blue)
 RXD (Gray)
GPS/CAT Jack
ON/OFF Switch
A :
dvice
 When connecting to an external GPS device, refer
to the operating manual of the connected device as
well.
 When using an external GPS device, separate the
FT-991 transceiver away from the external GPS de-
vice to reduce the possibility of RF interference.
unction
 
 
GPS/CAT Jack
  
 TXD (Serial data output)
(FTM-400DR/DE  FT-991)
 RXD (Serial data input)
(FTM-400DR/DE  FT-991)
 GND
MENU(SETUP ) Button
MULTI Knob
Page 111