The ornamental design for a transmitter, as shown and described.
Description:
FIG. 1 is a perspective view of a transmitter. FIG. 2 is a front elevational view thereof. FIG. 3 is a rear elevational view thereof. FIG. 4 is a top plan view thereof. FIG. 5 is a bottom plan view thereof. FIG. 6 is a right side elevational view of the transmitter; and, FIG. 7 is a left side elevational view thereof.
