In 1989, ZK introduced the ZK-SAM™, the first compact-sized portable cellular drive test product line targeted to the Cell Site Operations. The ZK-SAM is updated regularly with new features and technologies. The current version of the ZK-SAM has a full color display and supports all of the major wireless technologies.

In 1996, the DX line was developed to meet the more complex testing needs of the System Performance Engineer. Originally introduced as the DXMe the product name was changed to the ZK-SAMp where the 'p' stands for 'portable'. The user can configure multiple phones, technologies and scanners to provide high end performance in a vehicle mounted or portable product.

In 2000, RMS (autonomous data collection and analysis system – Real-time Monitoring System) was developed to meet the needs of the changing marketplace. Automating and centralizing drive testing is allowing operators to improve overall quality and reduce response time to issues (MTTR), while reducing engineering expenses.

In 2004, the RF Services Division was launched to provide optimization solutions to our customers. The RF Services division integrates and manages ZK’s hardware and software products and delivers the results to the customer and relieves them of the difficulties of maintaining and managing test equipment.

In 2005, EZ2Map and RT_Map were introduced to provide Post-processing and Real Time Mapping. The post-processing software is designed to be used by the Cell Site Technician so they can quickly and easily generate maps of the drive test data in the field. The real-time mapping software runs on a laptop and provides a real time view of your location along with your cell site locations.

In 2006, the DXMe was modified to target indoor measurement and benchmarking applications. The name was changed to the ZK-SAMp The ZK-SAMp is battery powered and can monitor up to 5 networks simultaneously. It weighs less than three pounds. It can be used in a vehicle as well making it extremely versatile.

Also in 2006, ZK introduced the ZK-MPS The ZK-MPS is a high performance drive testing product targetted to the System Performance and RF Engineers. It integrates a high speed Comarco 7-5 software based digital scanning receiver. The scanner can monitor multiple technologies and bands. In addition, up to 5 phones can be connected to the ZK-MPS to measure multiple bands, technologies or networks.