Fleetwood Group Inc. FCC ID: FBR-DL800B User Manual Page 2 of 4
File Name: DLMAN.DOC Date: 07/13/01
display. When interrogated by the base via the 216 MHz link, the keypad sends the key
information to the base in a 10 millisecond duration signal from the 345 MHz transmitter.
When the 216 MHz signal responds with an appropriate state of the acknowledge bit for the
keypad, the keypad turns back off and awaits the next key press. This sequence takes on the
average between one and two seconds. If the keypad LED winks and comes back on, the
signal was not received by the base and the keypad will retry the next time it is interrogated
(typically about 2.5 seconds). The keypad spends most of its time in a sleeping mode
conserving the battery and allowing for thousands of transmissions.
If a user wishes to talk to the instructor the user presses the “Talking Face” key on the keypad.
This transmits the microphone request to the base unit and via a data modem on the base to
the host to notify the instructor. When the instructor is ready to take the request, an activation
signal is sent out via the data modem to the remote site base unit which in turn commands the
keypad to activate the microphone.
In Case of Difficulty
The Reply® Model CRS10000 Keypads are built using the latest technology and high
reliability components. There are very few things the keypad user can do wrong to cause a
failure, but in the unlikely event responses are not being received by the base and passed on to
the personal computer, the next pages detail procedures that can help identify the source of the
problem:
