INTRODUCTION
The MC145190EVK, ’191EVK, ’200EVK, and ’201EVK are versions of one board with a few component changes. They allow users to exercise features of the four devices and to build PLLs which meet individual performance requirements. The control program works with any board and can be used with other Motorola PLL devices (MC145192, MC145202, MC145220*).

FEATURES
1. The EVK is a complete working synthesizer, including VCO.
2. Control program is written in Turbo Pascal.
3. Board is controlled by an IBM PC–compatible computer through the printer port.
4. Up to three boards can be operated independently through one printer port.
5. A prototype area and mounting holes are provided for VCOs, mixers, and amplifiers.
6. External reference input can be used.
7. Five element loop filter is included.
8. Frequency range of operation, step size and reference frequency can be changed in the control program.
9. Lock Detect, Out A, and Out B on any single board are accessible through the printer port.