CCIR System N

CCIR System N is an analog broadcast television system introduced in 1951 and adopted by Argentina, Paraguay and Uruguay, paired with the PAL color system (PAL-N) since 1980. It was also used briefly in Brazil and Venezuela. It employs the 625 line/50 field per second waveform of CCIR Systems B/G, D/K, and I, but on a 6 MHz channel with a chrominance subcarrier frequency of 3.582056 MHz (similar to NTSC).

Specifications
The general System N specifications are listed below.
 * Frame rate: 25 Hz
 * Interlace: 2/1
 * Field rate: 50 Hz
 * Lines/frame: 625
 * Line rate: 15.625 kHz
 * Visual bandwidth: 4.2 MHz
 * Vision modulation: Negative
 * Preemphasis: 75 μs
 * Sound modulation: FM
 * Sound offset: +4.5 MHz
 * Channel bandwidth: 6 MHz