In Brazil, the frequency 87.7 FM is one of the frequencies reserved for
community radio stations. These stations have power limited to up to 25 watts and coverage limited to a radius of up to 1 km.[3]
It also uses Pan American analog TV sound VHF channel 6 in
PAL-M (83.25 - 87.75 MHz).
87.75 MHz, a frequency-modulated audio subcarrier used by all
NTSC-M analog channel 6 television stations (discontinued July 13, 2021 in the United States)
For a list of channel 6 television stations transmitting using a modification of the
ATSC 3.0 digital TV standard to carry an analog FM audio feed on 87.75 MHz, usually advertised as 87.7 FM, see
Channel 6 radio stations in the United States.
2 Shortwave uses a combination of
AM,
VSB,
USB and
LSB, with some
NBFM and
CW/
morse code (in the case of
time signal stations) as well as numerous frequencies, depending on the time of day/night, season, and solar activity level. A reasonably full list from 16 kHz to 27MHz can be found at
[2]
3 Regions 1 and 3 also use Region 2's frequencies as well, with 50 to 100 kHz spacing.
In Brazil, the frequency 87.7 FM is one of the frequencies reserved for
community radio stations. These stations have power limited to up to 25 watts and coverage limited to a radius of up to 1 km.[3]
It also uses Pan American analog TV sound VHF channel 6 in
PAL-M (83.25 - 87.75 MHz).
87.75 MHz, a frequency-modulated audio subcarrier used by all
NTSC-M analog channel 6 television stations (discontinued July 13, 2021 in the United States)
For a list of channel 6 television stations transmitting using a modification of the
ATSC 3.0 digital TV standard to carry an analog FM audio feed on 87.75 MHz, usually advertised as 87.7 FM, see
Channel 6 radio stations in the United States.
2 Shortwave uses a combination of
AM,
VSB,
USB and
LSB, with some
NBFM and
CW/
morse code (in the case of
time signal stations) as well as numerous frequencies, depending on the time of day/night, season, and solar activity level. A reasonably full list from 16 kHz to 27MHz can be found at
[2]
3 Regions 1 and 3 also use Region 2's frequencies as well, with 50 to 100 kHz spacing.