Icom IC M802 Notes On Operation page 7

Step 2 – Input the Transmit Frequency
This step only needs to be completed if the transmit frequency is different than the receive frequency.
For many shore stations such as WLO radio, the marine telephone operator, the transmit frequency is
different than the receive frequency. This is called duplex operation as opposed to simplex where the
same transmit and receive frequency is used. One nice feature on the IC – M802 is that it automatically
assumes transmit frequency is the same as the received frequency unless changed. On prior units to the
IC – M802, transmit and receive must be programmed separately each time. (For the IC – M802,
programming a simplex channel requires no further action than programming the receive frequency.)
Transmit programming example: For one WLO Radio channel, shipboards receive frequency is
8788.0KHz, and the transmit frequency is 8264.0kHz.
Note: The WLO radio frequencies are opposite of the ships frequencies. WLO's transmit frequency is
8788.0KHz, and their receive frequency is 8264.0kHz. This will allow us to hear them when they transmit
and them to hear us when we transmit.
First program a Duplex channel to receive frequency to 8788.0KHz similar to above and then program
the transmit frequency to 8264.0kHz:
1. Press the [FREQ/CH] button until two frequencies
are shown, one above the other. At this point they
may or may not be the same frequency. (If the
channel is blank, the proper display is the one with
the channel number at the bottom of the display
as opposed to the center.) The upper number is
the receive Frequency and the lower, smaller number is the transmit frequency.
2. Press the [CLAR/RX] button.
3. Note: the  in the upper left corner of the [Function Display].
4. Using the key pad, press [8]; then [7]; then [8]; then [8]; then [0]
5. The [Function Display] should show 8.788.0
6. Press [ENT] momentarily. (If pressed to long and  is removed, press [CLAR/RX] again.)
7. The mode of operation is displayed in the upper center of the [Function Display].
8. Press the [SET/MODE] button repeatedly until the USB mode is displayed.
9. Press and Hold the [ENT] button until the  in the upper left corner of the [Function
Display] returns to only RX displayed.
10. The received channel is now programmed for 8788.0KHz frequency Upper SideBand
mode simplex as noted at the upper right side of the [Function Display] with SIMP.
Now change the Transmit frequency to create a duplex Channel
8. Press the [TXF/TX] button.
Frequency Indication Display