Title:
SETTING SYSTEM FOR TRANSMISSION RECEPTION SIGNAL LEVEL AND ITS SETTING METHOD
Document Type and Number:
Japanese Patent JP3123965
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To easily set level diagram setting economically and automatically between a common amplifier and a moden.
SOLUTION: A radio base station equipment 1 is made up of a common amplifier 2 provided with a DC superimposing circuit 4, that amplifies a high frequency signal by a prescribed amplification factor and superimposes a DC on the amplified signal on a coaxial cable signal line 6, a modem 3 provided with an electronic variable attenuation section 5 that controls the gain of an input output level of the high frequency signal on the signal line 6 corresponding to a DC voltage and the signal line consisting of coaxial cables 61, 62, 63 through which the high frequency signal is sent between the common amplifier 2 and the modem 3. The lengths of the coaxial cables are calculated, the conductivity of each coaxial cable is confirmed automatically, and the input/output level of the high frequency signal between the common amplifier 2 and the modem 3 is set automatically.
Inventors:
Yoshikazu Seki
Application Number:
JP34518297A
Publication Date:
January 15, 2001
Filing Date:
December 15, 1997
Export Citation:
Assignee:
Saitama NEC Corporation
International Classes:
H04B1/3822; H04B1/40; (IPC1-7): H04B1/40
Domestic Patent References:
| JP6377226A | ||||
| JP98577A | ||||
| JP5122115A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)
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