| 摘要 |
PURPOSE: An apparatus for adjusting an RF(Radio Frequency) signal using a prototype VXI module is provided to secure the stability of a system by automatizing a test to perform computer control and monitoring the RF signal. CONSTITUTION: A pin diode variable attenuator(b1) performs a TTL control of an RF signal inputted to an RF signal input port(P1) and has signal isolators(c1,c2) at its input terminal. A directional coupler(a1) provides the RF signal through the pin diode variable attenuator(b1) to an up-link signal monitoring port(P7) through a signal isolator(c4) without a combination rate, and provides the RF signal to a signal isolator(c3) according to the combination rate. A directional coupler(a2) provides the RF signal through the directional coupler(a1) to an up-link signal output port(P6) without the combination rate, and provides the RF signal to an up-link signal monitoring port(P5) according to the combination rate. A directional coupler(a3) provides the RF signal received to an RF signal receiving port(P8) to a signal isolator(c5) without the combination rate, and provides the RF signal to a down-link signal monitoring port(P9) according to the combination rate. A directional coupler(a4) provides the RF signal through the signal isolator(c5) to an up-link monitoring port(P10) through a signal isolator(c6), and provides the RF signal to an up-link signal output port(P2) according to the combination rate. A directional coupler(a5) receives the RF signals of the up-link and down-link signal output and monitoring ports(P5,P7,P9,P10) through an input port(P3), outputs the RF signal provided without the combination rate to a level measurement port(P11), and outputs the RF signal having the combination rate to a monitoring port(P4).
|
