Shibasoku TG39AC Multi Test Signal Generator

The ShibaSoku TG39AC Multi Test Signal Generator is a TG39 family device that serves as a portable, all‑in‑one test source for evaluating video paths and RF interfaces in televisions, set‑top boxes, VCRs, and other AV equipment. The TG39 family is documented to support eight formats—NTSC, NTSC-4.43, NTSC-50, PAL, PAL-M, PAL-N, PAL-60, and SECAM—with a library of built‑in test patterns such as color bars, stair-step patterns, and multiburst signals, making it a versatile tool for video signal generation. In public listings, RF signal capability is shown up to about 950 MHz, indicating the TG39AC's suitability for testing wide‑band RF paths in broadcast and consumer electronics. The TG39AC commonly appears in the used-test equipment market and distributor catalogs, including Machinio and Japanese retailers, reflecting its historical role in professional video testing rather than current production status. Because it is a specialized vintage instrument, buyers often seek it for refurbishment projects, labs upgrading legacy workflows, or collection purposes.