Internal wrap test circuit in radio equipment and test method th

Details Internal wrap test circuit in radio equipment and test method th Internal wrap test circuit in radio equipment and test method th

1997-10-06

1999-08-31

Hudspeth, David R.

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

485126, 4852261, H04B 1700, H01Q 1112

Patent

active

059466065

ABSTRACT:
The present invention provides an internal wrap test circuit in a radio equipment which is capable of conducting an internal wrap test, which radio equipment including two transmitting systems in which a transmission signal is amplified by a power amplifier and the amplified transmission signal is outputted in such a manner as to be changed over by a changeover switch to first and second circulators respectively connected to a first antenna and a second antenna, and two receiving systems in which received signals inputted through the first and second antennas are respectively transmitted to a first low noise amplifier and a second low noise amplifier via said first and second circulators, respectively, wherein the internal wrap test circuit includes a local oscillator which is connected to the power amplifier and to the first and second low noise amplifiers so as to control each gain of the power amplifier and the first and second low noise amplifiers, and the transmission signal is lowered to a fixed level to be made into a received signal by using each backward path of the transmission changeover switch and the first and second circulators.

REFERENCES:
patent: 3783192 (1974-01-01), Takahashi
patent: 4984293 (1991-01-01), Cummings et al.
patent: 5109535 (1992-04-01), Kume et al.
patent: 5471146 (1995-11-01), Krayeski et al.
patent: 5701595 (1997-12-01), Green, Jr.

Affiliated with

Also associated with

Rating

Internal wrap test circuit in radio equipment and test method th does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Internal wrap test circuit in radio equipment and test method th, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal wrap test circuit in radio equipment and test method th will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2428745