Claims
- 1. A mobile transceiver unit for transmitting messages to and receiving messages from a network comprising:
- input means for allowing a user to input a user message to the unit;
- transmitter means for transmitting a radio frequency signal including the user message from the mobile unit to the network;
- receiver means for receiving radio frequency signals having a message from the network;
- signal detector means for detecting a noise signal at approximately 400 Hz generated by an aircraft;
- means for determining whether the detected noise signal exceeds a predetermined threshold; and
- a circuit for disabling the transmitter means upon the determining means determining that the detected noise signal exceeds the predetermined threshold, thereby preventing unwanted radio frequency transmission.
- 2. The mobile transceiver unit of claim 1, further comprising:
- a plurality of input switches allowing the user to transmit a signal from the mobile transceiver unit.
- 3. The mobile transceiver unit of claim 2, wherein the plurality of input switches allow the user to transmit a reply to a received message.
- 4. The mobile transceiver unit of claim 3, further comprising:
- a display for displaying the received message and displaying a reply message associated with each of the plurality of input switches.
- 5. The mobile transceiver unit of claim 4, further comprising:
- means for generating and displaying the reply messages associated with each of the plurality of input switches based upon the contents of the received message.
- 6. The mobile transceiver unit of claim 1, further comprising:
- means for demodulating the received radio frequency signals from the network using a predetermined demodulation technique; and
- means for adaptively changing the demodulation technique to accommodate different signal modulation formats.
Parent Case Info
This is a division of application Ser. No. 07/97,918, filed Nov. 12, 1992, now U.S. Pat. No. 5,590,403.
US Referenced Citations (7)
Foreign Referenced Citations (4)
Number |
Date |
Country |
6482715 |
Mar 1989 |
JPX |
1181241 |
Jul 1989 |
JPX |
WO9118458 |
Nov 1991 |
WOX |
WO9211707 |
Jul 1992 |
WOX |
Non-Patent Literature Citations (2)
Entry |
Motorola's Technical Developments "Beacon Control of Radio Frequency transmitter to reduce Radio Frequency Interference" vol. 16, Aug. 1992. |
John D. Spragins, "Telecommunications Protocols and Design," Feb., 1991, pp. 280-281. |
Divisions (1)
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Number |
Date |
Country |
Parent |
973918 |
Nov 1992 |
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