ONLINE ELECTRONICS LTD
2405_5001_A01
Page 9 of 14
3.4.
OPERATING SCREEN
The figure above shows the operating screen with a typical 9kHz ping being received every 2
seconds. The operator can select and modify several items on this screen. Individual items are
highlighted (MENU is shown highlighted here) by using long presses on the 2405 CONTROL
BUTTON to move between items. Once the required item is highlighted a short press on the
2405 CONTROL BUTTON will select or modify the highlighted item. The screen shows the
following items.
MENU. Enters the menu system when selected. See section 3.5 SINGLE BUTTON MENU
INTERFACE for more information.
MODE. Toggles between (P)INGER MODE and (T)EST MODE if selected. PINGER MODE is
the normal operational mode used when searching for acoustic transmitters. TEST MODE is
used to confirm functionality of the unit as described in section 3.1 SELF TEST.
INCREMENT OR DECREMENT. Toggles between incrementing (
) or decrementing (
)
configurable items when selected.
RECEIVER FREQUENCY. Allows the operator to configure the receiver frequency between
8kHz and 50kHz when selected.
TIMEBASE. Allows the operator to set the timebase width of the screen between 3secs and
50secs when selected. As shown, if the timebase is set to 10 seconds and a pulse is
received every 2 seconds then you would expect to see approximately 5 evenly spaced
pulses on the screen.
GAIN. If MANUAL gain is selected then this value will have format MAN### and the
operator will be able to configure the gain between 003 and 255. If AGC (Automatic Gain
Control) is selected then this value will have format AGC### and the gain will be adjusted
automatically by the 2405. If AGC is selected then the gain cannot be configured
manually.
BATTERY INDICATOR. Gives an indication of the remaining battery capacity.
REPETITION RATE. When a distinct pulse is detected then the time since the last distinct
pulse is displayed in ##SEC format.
AVERAGE SIGNAL. This value shows an average of the received signals on the screen in
A### format. This gives an indication of the noise level in the system with a lower
number meaning a quieter (better) environment.
RAW SIGNAL. Shows the instantaneous level of signal in R### format. When a pulse
appears this value will peak, the stronger the pulse, the higher the number.
