Device for protection against transmission errors in an informat

Details Device for protection against transmission errors in an informat Device for protection against transmission errors in an informat

1977-04-14

1980-02-05

Griffin, Robert L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3401461A, 340159, 325364, 246 15, H04B 100

Patent

active

041874650

ABSTRACT:
A device is provided for protection against the presence of transmission errors in an information transmission system used in railroading. An interrogation apparatus emits a periodically variable interrogation signal within a specified frequency band consisting of successive frequency ranges. A reply apparatus selectively dampens the interrogation signal in sub-ranges of each frequency range so as to provide a frequency-selectively reflected interrogation signal which has power penetrations in the respective sub-ranges. The first switching member is provided to produce a first impulse sequence whose impulses lie centrally at the border of the sub-ranges. A comparator then determines whether the center of the power penetration lies within one of the sub-range border impulses. If such is the case, an interference signal is activated. Similarly a second switching member is provided which produces a second impulse sequence having impulses wider than those of the first impulse sequence. When the center of a power penetration lies within one of the impulses of the second impulse sequence, an alert signal is activated.

REFERENCES:
patent: 3445663 (1969-05-01), Jones et al.
Microwave System Sicarid TCL for Track to Train Information Transfer, Siemens, pp. 1-5.

Affiliated with

Also associated with

Rating

Device for protection against transmission errors in an informat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for protection against transmission errors in an informat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for protection against transmission errors in an informat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2182008