Foxhunt VK3YNG Sniffer 4 Instruction Manual - Page 10

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

Firmware version indication:

Pressing the "D-Set" button and then pressing the "F" button will display 4 digits

which indicate the installed firmware version.

During normal operation, the "9" and "0" buttons allow the setting of volume. The

display briefly shows the new level and reverts to displaying the current range when

the button is released. These buttons are disabled in reduced functionality mode.

Normally the sniffer automatically selects the best range for the currently received

signal. In some situations it may be necessary to range the sniffer manually. The range

control button can be used for this purpose. This button also controls a number of

other features depending on the mode selected.

In auto-ranging mode, pressing this button briefly displays the letter "r" in the display,

and then the display reverts to displaying the current range. Pressing any digit then

manually selects the range. The display briefly displays "r" followed by the selected

range. The sniffer remains in manual ranging mode until defeated by pressing the "R"

button a second time. This re-enables auto-ranging.

Holding this key during power-up toggles the state of the "range tone announcement"

flag. When this flag is set, the sniffer generates a "be-bop" tone sequence whenever

the sniffer ranges up or down. The frequency of the tones gives the operator audible

indication of the current range and the direction of the change. When this flag is

cleared, range changes happen without announcement.

This key is disabled in reduced functionality mode.

This range button also resets the peak range hold function if the down range delay (D-

set) is set to zero. In peak hold mode, manual ranging is disabled.

If the range button is pressed twice in succession, the display will briefly show the

maximum range the sniffer has achieved since power up or the last successful

frequency change.

In ARDF mode, (see Sync button section) the peak range value is automatically reset

at 30 seconds into the current transmitter cycle. This is very useful if there is a need to

check what range the sniffer got to just before the previous transmitter finished its

cycle.

This function is not available when Peak Hold mode (dSet=0) is selected.

Rev 2.2a

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