0 u2019 right half plane while the combination of the phase detector and accumulator 26 u2032 and the sine cosine generator 28 u2032 provides full phase wrap around capability and 180 u00b0 phase rotation invariant locking because vsb receivers are very sensitive to small phase rotations it may still be desirable to limit the phase error signal supplied to the sine cosine generator 28 u2032 and thus the phase correction signal supplied to the complex multiplier 22 to within a range of phase angles from 0 u00b0 or from 180 u00b0 this function may be provided by a phase limiter 27 coupled between the phase detector 26 u2032 and the sine cosine generator 28 u2032 illustrated in phantom in fig2 this phase limiter 27 operates by analyzing the phase error signal u03c6 e to determine the angle of the phase error signal u03c6 e from the closest real axis if this angle is greater than a specified phase range value termed u03b1 in the remainder of this application then the limited phase error signal supplied to the sine cosine generator 28 u2032 is controlled to be within a corresponding limit angle in a manner to be described below referring to table 3 below four phase limits are calculated based on the predetermined phase range value u03b1 assuming first that the phase detector and accumulator 26 u2032 is locked to the positive real axis 0 u00b0 a first phase limit u03b1 1 is equal to u03b1 and represents the end of the positive range from 0 u00b0 a second phase limit u03b1 2 is equal to u2212 u03b1 and represents the end of the negative range from 0 u00b0 assuming then that the.