78 FT-817ND Operating Manual
Press the key momentarily, then rotate the knob one click counter-clockwise to re-
select Operating Function Row 1
[
A/B, A=B, SPL
]
. Press the
(
A/B
)
key to select VFOb
(145.970 MHz).
Again press the key momentarily, and rotate the knob one click clockwise to re-
select Operating Function Row 2
[
MW, MC, TAG
]
. Press the
(
MW
)
key momentarily;
the “M-001” indicator will flash; press and hold in the microphone’s PTT key, and while
holding it in press the
(
MW
)
key until you hear the double beep. You have now stored
the uplink (earth station transmitting) frequency into the same memory register as we did
previously for the downlink frequency.
It’s now time to store the other frequencies in the matrix. Return to Operating Function Row
1
[
A/B, A=B, SPL
]
, and press the
(
A/B
)
key to return to VFOa on 435.080.00 MHz.
Now rotate the knob to set the frequency to 435.075.00 MHz. Press the
(
A/B
)
key again to select VFOb (145.970 MHz), and rotate the knob to set the frequency to
145.972.50 MHz. Press the
(
A/B
)
key to return to VFOa on 435.075.00 MHz.
Return to Operating Function 2
[
MW, MC, TAG
]
, and repeat the Split Memory storage
process, selecting memory channel M-002 this time when initially storing the 435.075 MHz
receiving frequency.
Now repeat this entire process three more times, filling memory channels M-003, M-004,
and M-005 with the frequencies shown in the chart above.
When it’s time to operate, press the key, if necessary, to recall the Memory mode, and
rotate the knob to select channel M-001. This will be the first frequency pair to be
utilized during the UO-14 window of workability when it rises above your local horizon.
The Doppler effect will cause the nominal 435.070 MHz downlink frequency to appear
higher to you, so utilize memory channel M-001 when the satellite first rises. A few minutes
later, switch to M-002, and at mid-pass switch to M-003. As the satellite recedes, switch to
M-004 and then M-005 toward the end of the pass.
The knob recall of these five channels makes Doppler tracking simple; just choose the
memory channel producing the best signal! You have already programmed an uplink fre-
quency corresponding to the optimum downlink frequency, so you will not need to try to
make difficult VFO adjustments during the brief satellite passes.
The FM passbands used on LEO satellites are sufficiently broad that more precise frequency
adjustment is not needed.
To aid in channel identification, remember that you can use Menu #35 (MEM TAG) to label
each satellite memory (for example, “UO-14a” ~ “UO-14e” for the above five channels).
SETUP OF MEMORIES FOR LOW EARTH ORBIT
(
LEO
)
FM SATELLITE OPERATION
APPENDIX
