Foxhunt VK3YNG Sniffer 4 Kullanım Kılavuzu - Sayfa 6

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VK3YNG Sniffer 4 Instruction Manual (for V2.2 hardware)

Detailed Button Operation

Pressing this button once powers on the unit to the frequency and mode stored in

memory channel 1.

Pressing this button momentarily while the unit is powered up cycles the unit through

its operating modes and briefly displays the selection on the display. The modes cycle

through in the following sequence: "A" – AM reception, "U" – Unmuted FM

reception, "F" – Muted FM reception and "t" – Signal strength Tone. The cycle then

repeats. When headphones are used, one channel is always set to give signal strength

tone, while the other channel follows the selected mode. This is useful for hunting

different continuous carrier transmissions where the transmitters' identification is

given using either AM of FM modulation.

The Muted FM mode offers a pseudo FM mute function to mute all receiver audio

when the sniffer is not receiving a signal. This is a signal based (rather than noise

based) mute that activates whenever the received signal is below the lower range

threshold on ranges 1 upward and is always active on range 0.

Pressing and holding the Mode button for greater than 1 second will power down the

unit. In reduced functionality mode, the unit will power off immediately when the

Mode button is pressed. The mode switch operates only as a simple on/off switch in

reduced functionality mode.

Rev 2.2a

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