You've hit on a niche but important problem. Yes, there is a need for a tool that can locally generate TWACS-like signals for testing purposes. However, finding an off-the-shelf solution that's readily available for purchase is likely going to be difficult, if not impossible. Here's why and what your options are

Why It's Difficult to Find an Off-the-Shelf Solution:
Proprietary Technology

TWACS (Two-Way Automatic Communication System) is a proprietary communication protocol. While the general principles are understood, the exact modulation schemes, frequencies, and data structures used by specific utilities are closely guarded. A generic TWACS signal generator wouldn't be universally applicable.

Low Demand

The market for such a device is small. It's primarily needed by manufacturers of LED ballasts and other sensitive electronic equipment who want to ensure compatibility, or by researchers studying grid interference. This small market doesn't justify the development and mass production of a commercial product.

Regulatory Concerns

Inadvertently interfering with the power grid is a serious issue. Even a testing device could potentially cause problems if not used carefully.

Your Options


Reverse Engineering and DIY (Most Likely Path)

This involves significant technical expertise and effort:

Acquire and Analyze Real TWACS Signals

The most accurate approach is to capture actual TWACS signals from your local utility. You'll need specialized equipment like a spectrum analyzer and a data acquisition system. This can be tricky, as you're looking for short-duration bursts of specific signals.

Software-Defined Radio (SDR)

Use an SDR platform (like a HackRF One or Ettus Research USRP) as the base. These are versatile transceivers that can be programmed to transmit and receive signals on a wide range of frequencies.

Develop Custom Firmware

You'll need to write custom firmware for the SDR to generate the TWACS-like signal based on your analysis. This will likely involve programming in languages like C++, Python, or GNU Radio. Consider the modulation techniques used by TWACS (likely some form of FSK or PSK) and the data encoding.

Careful Attenuation and Safety

Extremely important. You need to attenuate the signal significantly before injecting it into your power line. You're aiming to simulate the low-level signals received at a meter, not to transmit across the grid. Use appropriate isolation transformers and power conditioning.2.

Consult with Experts



Power Quality Consultants

These professionals often have specialized equipment and knowledge related to grid disturbances and can potentially help you analyze your power line and recommend testing methods.

University Engineering Departments

Reach out to electrical engineering departments at local universities. They may have research projects or students who could be interested in helping you develop a custom solution.3.

Contact the LED Ballast Manufacturers

Inform them of the issue and the specific utility that's causing the problem. They may have encountered similar issues with other installations and have suggestions for mitigation. While they might not have a signal generator, they may have filters or other solutions that can reduce the sensitivity of their ballasts to TWACS signals.4.

Talk to the Utility (Approach with Caution)



Transparency is Key

Inform the utility that you're experiencing problems with LED ballast compatibility and that you're trying to diagnose the issue.

Request Information (Politely)

Ask if they can provide any information about the frequency, timing, and power levels of their TWACS transmissions in your area. Be prepared for them to be reluctant to share proprietary information.



Suggest Collaboration

Explore the possibility of a joint test where they could temporarily increase TWACS activity while you monitor the effect on your equipment.

Important Considerations



Legal and Ethical Implications

Be extremely careful not to interfere with the normal operation of the power grid. Any testing should be done in a controlled environment and with appropriate safeguards.

Safety

Working with mains electricity is dangerous. Take all necessary precautions to prevent electric shock. Use proper grounding, isolation, and personal protective equipment.

Accuracy

The closer your simulated signal is to the real TWACS signal, the more reliable your test results will be.

In summary: While a ready-made TWACS signal generator is unlikely to exist, building one yourself using an SDR platform and reverse engineering techniques is the most feasible approach. Be prepared for a significant technical challenge. Consulting with experts, contacting the LED ballast manufacturer, and communicating with the utility (carefully) are also worthwhile steps. Remember safety and legal considerations are paramount. Flag for review