Wiktionary
n. (test pattern English)
Usage examples of "test patterns".
Their test patterns compared perfectly, but as Decker carefully worked his head free, his eyes still carried a worried look.
It had been flashing enigmatic test patterns while the audience settled down, but now it had gone blank except for the digital time display in the lower right-hand corner that indicated 09:58.
Three more displays glowed with the test patterns and serial numbers of the probes, and the next four terminals were set up for analysis and data retrieval.
He'd been wearing the damn thing for two weeks and hadn't seen anything on it except for occasional test patterns.
Some of the screens displayed diagrams and rapidly changing text, while others showed only test patterns.
The results were disappointing: the Interrogator's programming was starkly limited, a series of test patterns for fighting and service machines.
Nowadays they don't show test patterns at all on American TV, which is a shame because given a choice between test patterns and TV evangelists, I would unhesitatingly choose the test patterns.
Her implant followed along the test patterns, offering her a choice of views.