Motorola APX 7500, Detailed Service Manual

Page: 73 / 164

68009482001 September 9, 2011
Feature Operation: VU Meter Operation 4-3
Setting the clock is accessed through the SETUP softmenu underneath the auxiliary display. Exiting
clock set mode causes the time to be programmed and time display resumes counting from the
newly entered time. A period of keypad inactivity while in clock set mode will also cause the
Consolette to exit clock set mode, but the new time will not be programmed into the hardware.
Optionally, the time can be retrieved from the NTP server when connected to the network by
enabling the “Network Time (NTP) Query” field using the onboard Consolette Configuration
application.
Timekeeping is done by the RTC circuitry on the controller card within the Consolette. A battery
backup circuit is used with the Clock. If power is completely interrupted to the Consolette, the internal
coin cell battery will maintain the time. Once power is restored to the Consolette the display will show
the correct time.
The Consolette ships from the factory with a coin cell installed. It is an Energizer CR2032 or
equivalent battery and is rated for a nominal voltage of 3.0 Volts. Typical capacity is 240mA hours
down to 2.0 Volts. For proper operation of the clock, it is recommended that the coin cell battery be
changed every five years or sooner depending on the Consolette use case. It is also recommended
to remove the coin cell battery when the Consolette is powered down and not in use for an extended
period of time, such as storage or in the event that the Consolette is used outside of an office
environment.
4.8 VU Meter Operation
The Consolette supports a VU Meter on its auxiliary display. The VU Meter is a bar-graph
representation of the audio level on the currently selected transmit audio input. The VU meter
provides a semi-instantaneous reading of the input level on the active source, thus it is not a true
weighted VU function. The VU Meter can be enabled/disabled using the onboard Consolette
Configuration application.
4.9 Speaker Mute Operation (L999_ required)
The Consolette supports a Speaker Mute button on units with a Control Head present. This button
can be used to mute the front panel speaker for a programmable duration (10, 30, 60, or 120
seconds) or until the button is pressed again.
When the Speaker Mute button is activated, its backlight will change to red as an indicator to the
operator. The red backlight may be disabled in the Consolette codeplug. Also, an icon on the
auxiliary display is shown to indicate when the speaker is muted.
There are audio interactions between the Speaker Mute button and some rear panel inputs including
the Headset and the Mute_In* input (Crossmute feature). The Speaker Mute button is operational as
long as a Headset is not attached. Once the Headset is attached, the local speaker is automatically
muted and the Speaker Mute button is disabled for as long as the Headset is attached. When the
Headset is removed, the Speaker Mute button is again functional. Additionally, if the Mute_In* signal
on the rear of the Consolette is activated, the local speaker is automatically muted. When the
Mute_In* signal is deactivated, the local speaker will either stay muted or unmute depending on the
last selection of the Speaker Mute button.
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN
INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE
INSTRUCTIONS
!
C a u t i o n