Motorola APX 7500, Подробное руководство по обслуживанию

Страница: 88 / 164

September 9, 2011 68009482001
4-18 Feature Operation: PTT Footswitch (L999_ required)
NOTE: The MCC Series Headset Jack B1913A is not supported by the Consolette. Headset
connections are only supported on Consolette models with a full featured front panel. They
are not active on limited front panel units.
4.13.1 Connection
When a Headset Interface Box is connected to the rear panel, the Consolette will detect the
connection and mute the front panel speaker. Additionally, the Headset icon will be shown on the
front panel auxiliary display while the headset(s) is connected.
When the headsets are disconnected, the Consolette will remove the mute override from the front
panel speaker. Front panel speaker audio will be set to the current level indicated by the rotary
volume of the O5 control head.
4.13.2 Receive Operation
When receive audio is present from the radio, the Consolette routes the audio to both headsets.
When audio is not present from the radio, the Consolette mutes this path. The user can control the
level of audio to the headset speakers by adjusting the volume control on the O5 control head. An
attenuator on the Consolette controller card is used to scale the audio from the Codec for the
headset paths. For more information on the Headset configuration refer to
section 3.7.3.4 .
4.13.3 Transmit Operation
When the PTT signal from either headset is pressed, the microphone audio from the two headsets
are combined and sent to the radio for transmit operation. While transmitting, the headset speakers
will be muted. As a result, the user of one headset does not hear the mic audio from the other
headset.
If the TRC, or ACIM inputs have priority over the headset, the headset PTT is ignored or interrupted.
The headset, crosspatch, and APCO PTT inputs are accepted in a "first come first served" priority.
The O5 control head microphone continues to be enabled while the headset is attached. When both
the headset and the local microphone are used at the same time, the audio is combined and sent to
the radio for transmit operation.
For information regarding the tuning procedure of the Headset interface, refer to section 3.7.3.4 in
this manual.
4.14 PTT Footswitch (L999_ required)
The Consolette provides two Headset connections one of which can be used with a PTT Footswitch
for hands free operation. A headset is connected to one of the RJ45 Headset connectors to provide
the microphone audio and speaker audio signals. The Footswitch is then connected to the other
RJ45 Headset connector. The user would have to modify the footswitch connector to attach to the
Consolette. Signals include:
• HDSTx_PTT* - This is a logic input to cause the radio to transmit. The radio will transmit when
this input is pulled to less than 0.8VDC to ground.
NOTE: Enabling/Disabling Monitor is not supported on this interface.
4.15 Crosspatch Operation
The Consolette supports a Crosspatch Interface on a dedicated RJ45 connector on the rear panel.
The Crosspatch allows connecting two Consolettes such that each will rebroadcast the audio
received on the other, to allow cross-system communications. This is especially useful when a user
has two systems in two different bands that need to communicate.