Search results
Results From The WOW.Com Content Network
Ten-code. Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1]
Radio check 10-33 Emergency traffic, clear the channel. CB code for Mayday for trucks and police cars. 3s and 8s Well wishes to a fellow driver. Borrowed from amateur radio telegraphy codes "73" (best regards) and "88" (hugs and kisses). 10-36 Correct time ("Can I get a 10-36?") 10-41 Driver is signing on or changing the channel on their radio ...
Snellen chart. Purpose. Snellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10) A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula ...
See Visual_acuity#Legal_definitions: VA Nsc - VA Ncc Visual acuity with Near chart without correctors Visual acuity with eye chart at Near 15.7 inches (400 mm) and without (sc: Latin sine correctore) correctors (spectacles); Ncc is with (cc: Latin cum correctore) correctors. See Visual_acuity#Legal_definitions: VA OS Left visual acuity VA OD ...
Cobra 50 WX ST Handheld CB Radio. Citizens band radio ( CB radio) is a land mobile radio system, a system allowing short-distance one-to-many bidirectional voice communication among individuals, using two-way radios operating near 27 MHz (or the 11-m wavelength) in the high frequency or shortwave band. Citizens band is distinct from other ...
For 6/6 = 1.0 acuity, the size of a letter on the Snellen chart or Landolt C chart is a visual angle of 5 arc minutes (1 arc min = 1/60 of a degree), which is a 43 point font at 20 feet. By the design of a typical optotype (like a Snellen E or a Landolt C), the critical gap that needs to be resolved is 1/5 this value, i.e., 1 arc min.
The original VU meter is a passive electromechanical device, namely a 200 μA DC d'Arsonval movement ammeter fed from a full-wave copper-oxide rectifier mounted within the meter case. The mass of the needle causes a relatively slow response, which in effect integrates or smooths the signal, with a rise time of 300 ms.
In the United States, the Citizens Band Radio Service (CBRS), commonly called citizens band radio (CB radio), is one of several personal radio services defined under Title 47 of the Code of Federal Regulations, Part 95. [1] It is intended to be a two-way voice communication service for use in personal and business activities of the general ...