FCC ID: K66FT-857
Operating Manual
Vertex Standard Co., Ltd.
90
Function Row “a” [A/B, A=B, SPL]. Press the [A](A/B) key to select VFOb (145.970 MHz).
Again press the [F] key momentarily, and rotate the MEM/VFO CH knob one click clockwise to re-select Multi Function
Row “b” [MW, SKIP, TAG]. Press the [A](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 [A](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 Multi Function Row “a” [A/B, A=B, SPL], and press
the [A](A/B) key to return to VFOa on 435.080.00 MHz. Now rotate the DIAL knob to set the frequency to 435.075.00
MHz. Press the [A](A/B) key again to select VFOb (145.970 MHz), and rotate the DIAL knob to set the frequency to
145.972.50 MHz. Press the [A](A/B) key to return to VFOa on 435.075.00 MHz.
Return to Multi Function “b” [MW, SKIP, 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 [V/M] key, if necessary, to recall the Memory mode, and rotate the MEM/VFO CH
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 MEM/VFO CH 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 frequency 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 Mode No-056 [MEM TAG] to label each satellite
memory (for example, “UO-14a” ~ “UO-14e” for the above five channels).
A complete set of frequencies may be stored for each LEO satellite you wish to utilize, and once configured, the FT-857
provides a flexible and easy-to-use earth station capability for these popular satellites.
