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Notes:
• Only those WHAM x 4 microphones or sub radios with which the radio can communicate
appear on the display.
• Only one pair of WHAM x 4 mics can be on the intercom unless you make a group or
select all.
• No person in the group can hear the MRN signal except the main radio.
• If a DCS signal is received, or if 16/9/TRI is pressed, the Intercom mode reverts to Radio
mode.
• A connected WHAM x 4 cannot change either the base or sub radio remotely.
• A connected WHAM x 4 unit cannot cancel INTERCOM mode remotely.
To exit intercom, hold down HAIL/INTERCOM for about 2 seconds.
Using GPS
Connect an external GPS unit to the NMEA0183 connection. The GPS unit then displays data
and the UM625c displays its information in white to confirm valid data. If no valid data is repre-
sent, the information is displayed in red.
• To change to the GPS mode, press and hold PUSH/SELECT for 2 seconds. Date, time,
speed, heading, latitude, and longitude are displayed.
• To change back to normal model, press and hold PUSH/SELECT for 2 seconds again.
Note:
If the radio fails to receive valid GPS data, no change is displayed on the radio.
The local UTC time offset is automatically applied based on longitude and latitude data. It
also takes into account the International Date Line.
You can also adjust the time by TIME ADJUST and DAYLIGHT SAV.
If no valid GPS data is present, any GPS information is displayed in red.
Using Battery Hi/Lo Detect
The radio automatically alerts you if the connected battery is providing too much or not
enough voltage. If the battery is providing more than 16 volts,
CHECK BATTERY HIGH
VOLTAGE
appears. If the battery is providing less than 11 volts, CHECK BATTERY LOW
VOLTAGE
appears. Press any key to delete the message temporarily. If the condition contin-
ues, the message returns.
Using 16/9 TRI
Press 16/9 TRI once to quickly tune the radio to Channel 16. Press 16/9 TRI again to quickly
tune the radio to Channel 9. Press 16/9 TRI a third time to quickly retune the radio to the
previous channel.
Notes:
• Pressing 16/9 TRI cancels WX mode if the radio is set to WX mode.
Basic Operation