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6.1. Storing and un-storing a selected level of noise cancelling
Once a suitable filter level has been selected, press and hold the FUNCTION button for a
few seconds to store the selection. The unit will respond with a single tone beep and the
STATUS LED will turn green. Further presses of the FUNCTION button will now cause
the unit to cycle between noise cancelling “off” (STATUS LED red) and noise cancelling
“on” at the saved level (STATUS LED – green). To un-store the saved level, press and
hold the FUNCTION button again until the unit emits a tone. The STATUS indicator will
change back to red and the unit can now cycle through the various levels of noise
cancellation again. If the speaker is switched off at this stage, it will remember the last
stored setting but with noise cancellation off (red LED) when switched back on.
Note: It is advisable not to drive a vehicle and change the filter level at the same time,
and higher levels of noise cancellation will remove a lot of noise, but the user will note that
the audio can be slightly distorted if high levels of noise are present with the signal.
Switching off the noise cancellation will restore the audio. If there is a lot of noise present
you may need to increase the output volume when listening with the noise cancellation
switched on, once the noise has been removed. If the volume is increased and the noise
cancellation is then switched off, the resulting unprocessed signal will be at a higher level.
Care must be taken to avoid excessive signal levels to avoid possible damage to your
hearing or equipment. bhi Ltd does not accept responsibility for damage to equipment or
hearing however caused.
7. Sleep mode
The DSPKR has a sleep mode to save energy when not in use. In this mode the speaker
is put to sleep by: 1. Pressing and holding the FUNCTION button for approximately 6
seconds. You will hear a single beep after a few seconds, then after approximately six
seconds three beeps descending in frequency. Releasing the button after this will leave
the speaker in sleep mode, or 2. Auto sleep is enabled (comes as standard, see 7.1). In
sleep mode the unit consumes very little current (3mA) and the STATUS indicator flashes
red approximately every 15 seconds to show that it is still powered but in sleep mode.
7.1. Auto sleep function
The Auto sleep feature means that if the unit fails to see any audio above the minimum
required level for more than 60 minutes, it will automatically go into Sleep mode.
The Auto Sleep feature can be can be turned on or off at power-up by pressing and
holding the FUNCTION button whilst turning the power on. After approximately 10
seconds a set of two, three tone beeps ascending in frequency indicate that the Auto
Sleep feature is disabled, and a set of two, three tone beeps descending in frequency will
indicate that Auto Sleep feature is enabled. After releasing the button you will hear a
single beep, then a set of three beeps and the STATUS LED will be red indicating the unit
is ready for use. The unit wakes up if the signal level increases above the minimum
required level or if the FUNCTION button is pressed once. Three beeps ascending in
frequency will be heard and the audio will be restored to the last known setting.
When the Auto sleep is disabled, the speaker is always on and will not go to sleep if no
signal is present. The speaker can still put to sleep manually as in 7. Above.
