Foxhunt VK3YNG Sniffer 4 Instrukcja obsługi - Strona 9

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

D-Set button

Ranging up on the sniffer happens automatically with minimal delay. To implement

short term peak detection, there is an intentional delay before the sniffer ranges down.

This delay is programmable between 1 and 5 seconds using the D-Set button. For

beginners, a value between 3 and 5 seconds is recommended. For more advanced

users, 1 or 2 seconds gives better results. When hunting intermittent and very short

duration transmissions such as those used on wildlife, 5 seconds or "peak hold" mode

(see below) is recommended. The factory default is 2 seconds.

To set the range down delay, press the "D-Set" button. The display will respond by

displaying the letter "d". Pressing buttons 0 through 5 will then set and store the new

range down delay.

Pressing the D-set (7) button twice will briefly display the current range down delay

in seconds. The display then reverts to displaying the current range.

Setting a range down delay of zero disables down ranging. In this case the sniffer

operates in a "peak hold" mode and down ranging is disabled. Manual ranging is

disabled and pressing the "range" button will reset the current peak hold range to

zero. This mode is useful when hunting extremely intermittent signals such as wildlife

or model aircraft beacons.

Holding the "D-Set" key during power-up causes the sniffer to operate in lower tone

RSSI mode. This mode may prove useful to those who have difficulty hearing higher

audio frequencies. In this mode the signal strength tone frequencies are divided by 4.

The top tone pitch is limited to about 2KHz and resolution becomes slightly limited at

the lowest tone frequencies. (Note: this mode has no effect on the pitch of supervisory

beep and tone frequencies)

This key is disabled in reduced functionality mode.

Pressing the "D-Set" button then pressing "7" will display 4 digits indicating the

number of hours and minutes since the receiver was powered up. This can be useful

for ARDF events where the user may have forgotten to synchronise their watch.

Pressing the "D-Set" button then pressing "9" will display two digits giving an

indication of the relative battery capacity in percentage terms. 99% indicates a full

battery while 0% indicates the point where sniffer operation is significantly

compromised. The sniffer may power itself off before reaching 0%.

Rev 2.2a

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