Vertex Standard FT-857 Operating Manual page 53

Scanning Operation
In order for the FT-857 to scan automatically, the Squelch must be set so that the background noise is silenced, because
the command to "Stop Scanning" driven by the same circuit that causes the green "Busy" LED to light up (when noise or
a signal is received).
1. Set the SQL knob to the point where background noise is silenced. A typical setting, for effective scanning operation,
will be at 12 o'clock or slightly clockwise from this position.
2. Set the transceiver into the operating configuration in which you wish to scan (VFO or Memory; PMS will be
described later).
3. Press the [F] key momentarily, then rotate the MEM/VFO CH knob, as needed, until Multi Function Row "g" [SCN,
PRI, DW] appears on the display.
4. Press the [A](SCN) key momentarily to start upward scan (toward higher frequencies or higher memory channel
numbers).
5. Rotate the DIAL knob or MEM/VFO CH knob counterclockwise to toggle the scanning direction downward.
6. The scanner will now cause the transceiver to increment in the chosen direction until a signal is detected. When a
signal is encountered which opens the Squelch, it will do different things, depending on the operating mode:
µ
In the FM/AM modes, the transceiver pauses on the signal and stays locked on its frequency for five seconds.
Thereafter, scanning will resume whether or not the other station's transmission has ended. While the transceiver
is in the "Pause" condition, the decimal points in the frequency display area will blink. See "Scan-Resume
Choices" on next chapter for details of how to customize the resumption of scanning.
µ
In the SSB/CW modes, the scanner will slow down (but wonn't stop).
7. Press the PTT switch on the microphone to cancel scanning.
You may also press and hold in either the [UP] or [DWN] key on the microphone for one second to initiate upward or
downward scanning, respectively, if Menu Mode No-058 [MIC SCAN] is set to "ON."
Scan-Resume Choices
Scanning operation requires that you have the FT-857's audio squelched. The transceiver then "assumes" that the opening
of the squelch corresponds to the discovery of a signal you may wish to listen to.
Once the scan has been halted, one of three things may happen:
TIME (default action): In this mode, the transceiver pauses on the signal and stays locked on its frequency for five
seconds. Thereafter, scanning will resume whether or not the other station's transmission has ended. The
pause time is adjustable from 1 to 10 seconds via Menu Mode No-078 [SCAN RESUME].
BUSY: In this mode, the scanner will halt until the other station's transmission ceases (at which point the squelch will
close). One second after the squelch closes, scanning resumes automatically.
53
FCC ID: K66FT-857
Operating Manual
Vertex Standard Co., Ltd.