| 摘要 |
<p>PURPOSE:To reduce a acquisition error, by providing a switch to change the constitution of a local cord. CONSTITUTION:Switch 13 to select the (a) side or the (b) side is provided between multiplier 14 and phase detector 2. The (a) side is connected to the receiving cord, and the (b) side is connected to the output of multiplier 14. Multiplier 6 is connected to the output of multiplier 14. For acquisition of cord CL, switch 13 is switched to the (a) side. The receiving cord is connected to phase detector 2 as it is and is acquired with the correlation value of approximately 1/2V. Next, if the local cord is denoted as (x), acquisition of cord CL is always held with the correlation value of approximately 1/2V, and the correlation value of cord X is 0V and approximately 1/2V for noncoincidence and coincidence respectively. Next, for acquisition of cord Y, switch 13 is switched to the (b) side, and x.y is generated as the local cord.</p> |
