This product has been discontinued
Please consider this product instead:

The ATC-601 was a microprocessor controlled ramp test set designed to perform all transponder tests required under the revised FAR91.172. Part 43, Appendix F.
Please consider this product instead:
The ATC-601 was a microprocessor controlled ramp test set designed to perform all transponder tests required under the revised FAR91.172. Part 43, Appendix F.