User Manual

Confidential - Do Not Distribute Revision A - Sep. 9 2011 page 16 of 18
8 State Summary
8.1 Power On/Off
8.2 Power Transitions
[R106]. The unit is in power off mode when the AC power is disconnected.
[R107]. The system shall transition from power off to standby mode (reaching an idle state ready for user
input) within 1 second upon plugging the AC power in.
[R108]. The unit should transition from off to operational mode instantly. If this is not possible the unit
shall blink certain LEDs while transitioning from off to operational mode (to be defined in the UI spec).
[R109]. The unit should transition from operational mode to standby instantly. If this is not possible the
unit shall blink certain LEDs while transitioning from off to operational mode (to be defined in the UI
spec).
8.2.1 Buttons
[R110]. The system shall transitions from off to operational mode via the following actions:
a. Front panel Power button is pressed
b. Bluetooth b button is pressed
c. Wi-Fi button is pressed
[R111]. The system shall transitions from operational mode to off via the following actions:
a. Top panel standby button is pressed
8.3 Volume States
[R112]. The factory default volume setting shall be -20 dB.
[R113]. When the system transitions from off to operational mode, the last volume setting when the
system was previously in operational mode shall again be the volume setting.
[R114]. When transitioning from one source to another, the current volume setting shall persist.
[R115]. When the system transitions from off to operational mode, the volume should ramp from minus
infinity to the current volume setting in 250 ms.
[R116]. When the system transitions from operational mode to standby, the volume should ramp from the
current volume setting to minus infinity in 250 ms.
[R117]. When the current source is changed, the volume should ramp from the current volume setting to
minus infinity, the source should switch, and then the volume should ramp from minus infinity to the
current setting. The entire process should occur within 500 ms.
8.4 Mute State
[R118]. In operational mode, the system shall always be in one of two mute states: mute on or mute off.
[R119]. When the system transitions from standby mode to operational mode, the mute state shall always
be mute off.
[R120]. When the current mute state is mute off, pressing the mute button or pressing the top panel
volume + and volume – buttons simultaneously shall cause the mute state to transition to mute on.
[R121]. When the current mute state is mute off, pressing the mute button or pressing the top panel
volume + and volume – buttons simultaneously shall cause the mute state to transition to mute on.
[R122]. When the current mute state is mute on, pressing the mute button or pressing the top panel
volume + and volume – buttons simultaneously shall cause the mute state to transition to mute off.
[R123]. When the current mute state is mute on, pressing the volume + button on the top panel shall
cause the mute state to transition to mute off.
[R124]. When the current mute state is mute on, pressing the volume - button on the top panel shall
cause the mute state to transition to mute off.