Editing Automatic picture transmission (section)

=== Broadcast signal ===
The signal itself is a 256-level [[amplitude modulated]] 2400[[Hertz|Hz]] [[subcarrier]], which is then [[frequency modulated]] onto the 137&nbsp;MHz-band [[Carrier wave|RF carrier]]. Maximum subcarrier modulation is 87% (±5%), and overall [[RF]] [[Bandwidth (signal processing)|bandwidth]] is 34&nbsp;kHz. On NOAA POES vehicles, the signal is broadcast at approximately 37[[dBm]] (5 watts)<ref>{{cite web |url=http://www.ncdc.noaa.gov/oa/pod-guide/ncdc/docs/klm/html/c4/sec4-2.htm |url-status=dead |archive-url=https://web.archive.org/web/20080706174801/http://www.ncdc.noaa.gov/oa/pod-guide/ncdc/docs/klm/html/c4/sec4-2.htm |archive-date=2008-07-06 |title=NOAA KLM USER'S GUIDE Section 4.2}}</ref> [[effective radiated power]].