CTA - IS-16-A
Immunity of Television Receivers and Video Cassette Recorders (VCR's) to Direct Radiation from Radio Transmissions, 0.5 to 30 MHz
| Organization: | CTA |
| Publication Date: | 1 January 1987 |
| Status: | inactive |
| Page Count: | 13 |
scope:
Introduction:
The objective of the procedure is to determine the field strength that causes just perceptible interference to the picture or sound when the desired visual carrier level is equivalent to a grade B contour signal. Measurements at - 25dBm are also made to assure that AGC operation does not affect immunity.
A.2m TEM cell is the preferred method of generating the undesired field, however, an open strip line ("Jacky") or an open field site may be employed. When an open field site is employed, the radiated field should be vertically polarized. The field within the volume to be occupied by the product should be verified as being uniform to within 2dB. The jacky (in the specified frequency band) and TEM cells have demonstrated a field uniformity better than 2dB.
No International Electro technical Commission (CISPR) measurement procedure has been published; however, this procedure is based on that of a draft being considered.
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