FCC ID: K66FT-857
Operating Manual
Vertex Standard Co., Ltd.
89
memory system is ideal for configuring a set of memories for LEO satellite work.
The example below is designed around the popular satellite UO-14, but the same principles apply to operation using AO-
27, SO-35, and other such satellites.
First, set up a table of the required operating frequencies. For UO-14, a typical setup table is shown below:
Channel #
Rx Freq.
Tx Freq.
Notes
1
435.080
145.970.0
AOS
2
435.075
145.972.5
3
435.070
145.975.0
Mid Pass
4
435.065
145.977.5
5
435.060
145.980.0
LOS
AOS = Acquisition of Signal (Beginning of Pass)
LOS = Loss of Signal (End of Pass)
The above frequencies are nominal, and the changing frequencies reflects the Doppler Shift which occurs on such
satellites, which display rapid apparent motion relative to an earth-based observer. But if we can accommodate a set of
several frequency pairs in our memory system, frequencies that reflect the frequency relationships encountered during a
typical pass, we will have a good chance of having our frequencies properly aligned when it is time for making a QSO.
So we need to store the above frequency matrix into memories. Note that the receiving frequency and transmitting
frequency are on different bands. Therefore, we will use the “Split Frequency Memory” storage technique described on
page 42.
First, press the [F] key momentarily, then rotate the MEM/VFO CH knob to select Multi Function Row “a” [A/B, A=B,
SPL]. Press the [A](A/B) key, if necessary, to select VFOa.
Now press the BAND(DWN) or BAND(UP) key to select the 70 cm band. Check the setting of Menu Mode No-004
[AM&FM DIAL]. and set this to “ENABLE” to allow smaller frequency increments to be accommodated.
Set the VFOa operating frequency to 435.0800.00 MHz. Now press the [A](A/B) key in Multi Function Row “a” to select
VFOb, and set VFOb to 145.970.00 MHz. Again press the [A](A/B) key to return to VFOa. Be sure that both VFOs are
set to the FM mode, as well.
Press the [F] key momentarily, and rotate the MEM/VFO CH knob one click clockwise to select Multi Function Row
“b”[MW, SKIP, TAG].
Press the [A](MW) key momentarily, then rotate the MEM/VFO CH knob while the memory channel number is blinking;
select memory channel M-001, then press and hold in the [A](MW) key until you hear the double beep. We have just
stored the first downlink (earth station receiving) frequency into memory.
Press the [F] key momentarily, then rotate the MEM/VFO CH knob one click counter-clockwise to re-select Multi