reject -45 dBm per frequency - -------------------------------------------------------------------------------------------------------- Twist (ratio of high group power to low) adjacent frequencies; for adjacent frequencies; non-adjacent frequencies; for non-adjacent frequencies 20 ddB twist must reject 20 dB twist must reject - -------------------------------------------------------------------------------------------------------- Software License D2 Technologies, Inc. and Maintenance Agreement August 4, 1997 CONFIDENTIAL 42 - -------------------------------------------------------------------------------------------------------- Disturbing Frequencies Must not falsely detect due to Must not falsely detect due to any one or more valid R2 any one or more valid R2 frequencies at -55 dBm per frequencies at -55 dBm per frequency. frequency. In the presence of a valid R2 In the presence of a valid R2 tone, no missed detections and tone, no missed detections and no false detections due to any no false detections due to any of the remaining frequencies at of the remaining frequencies at 20 dB below the highest of the 20 dB below the highest of the MF tone pair. MF tone pair. Must not falsely Must not falsely detect due to: detect due to: 1. Any 1 or 2 pure sine waves, 1. Any 1 or 2 pure sine waves, each at -38.5 dBm0, 300-3400 each at -38.5 dBm0, 300-3400 Hz. Hz. 2. Any 1 or 2 pure sine waves, 2. Any 1 or 2 pure sine waves, each at -42 dBm, 300-3400 Hz. each at -42 dBm, 300-3400 Hz. 3. Forward detector: Any 2 3. Forward detector: Any 2 pure sine waves, each at -5 pure sine waves, each at -5 dBm, 330-1150 Hz or 2130-3400 dBm, 330-1150 Hz or 2130-3400 Hz. Hz. 4. Backward detector: Any 2 4. Backward detector: Any 2 pure sine waves, each at -5 pure sine waves, each at -5 dBm, 1300-3400 Hz. dBm, 1300-3400 Hz. - -------------------------------------------------------------------------------------------------------- Transmitted signal interference Must not falsely detect due to Must not falsely