![The Bell System technical journal . existing boards of various types.This feature is of particular value as the maximum efficiency of high-speed measuring systems can be obtained only when all test The Bell System technical journal . existing boards of various types.This feature is of particular value as the maximum efficiency of high-speed measuring systems can be obtained only when all test](https://c8.alamy.com/comp/2CRW9Y4/the-bell-system-technical-journal-existing-boards-of-various-typesthis-feature-is-of-particular-value-as-the-maximum-efficiency-of-high-speed-measuring-systems-can-be-obtained-only-when-all-test-boards-new-transmission-measuring-systems-13-are-equipped-with-them-two-arrangements-are-available-for-testboard-use-one-employs-a-conventional-type-of-meter-mounted-inthe-keyshelf-or-on-a-panel-and-the-other-employs-the-projection-typeof-meter-which-is-illustrated-in-fig-9-the-method-of-operation-issimple-when-a-transmission-test-is-to-be-made-the-tester-listensuntil-he-hears-the-tone-cause-2CRW9Y4.jpg)
The Bell System technical journal . existing boards of various types.This feature is of particular value as the maximum efficiency of high-speed measuring systems can be obtained only when all test
![Planned design for experiment 1: Test figures adapted from Blaisdell et... | Download Scientific Diagram Planned design for experiment 1: Test figures adapted from Blaisdell et... | Download Scientific Diagram](https://www.researchgate.net/publication/356692496/figure/fig4/AS:1098214887428101@1638846241975/Planned-design-for-experiment-1-Test-figures-adapted-from-Blaisdell-et-al-2006-In.png)
Planned design for experiment 1: Test figures adapted from Blaisdell et... | Download Scientific Diagram
![Examples of melodies used in Scale test (a, b), Off-beat test (c, e)... | Download Scientific Diagram Examples of melodies used in Scale test (a, b), Off-beat test (c, e)... | Download Scientific Diagram](https://www.researchgate.net/publication/286444488/figure/fig1/AS:961334187413506@1606211339089/Examples-of-melodies-used-in-Scale-test-a-b-Off-beat-test-c-e-and-Out-of-key-test.gif)