What are the FT8 frequencies?
FT8
| Frequencies | 3.573 MHz,7.074 MHz,10.136 MHz,14.074 MHz,24.915 MHz,50.323 MHz,70.1 MHz,144.174 MHz,1.84 MHz,18.1 MHz,21.074 MHz,28.074 MHz,50.313 MHz |
| Frequency Range | 1.84 MHz – 144.174 MHz |
| Mode | USB |
| Modulation | GFSK |
| ACF | — |
What is JT65 mode?
The short and simplified answer to this question is that JT65 is a weak signal digital mode that uses precisely timed transmit- receive sequences. You transmit for about one minute and listen for one minute. Transmission actually begins 1 second after the start of a UTC minute and stops precisely 46.8 seconds later.
What is JS8 call?
JS8Call (JS8) is an amateur radio QSO communication mode based on FT8. It is popular among amateur radio operators for its ability to send and receive messages despite challenging propagation conditions, high noise environments, low power operations (QRP), or even compromised antennas.
What’s the difference between FT4 and FT8?
Introduction: FT4 is an experimental digital mode designed specifically for radio contesting. T/R sequences are 6 seconds long, so FT4 is 2.5 × faster than FT8 and about the same speed as RTTY for radio contesting. FT4 can work with signals 10 dB weaker than needed for RTTY, while using much less bandwidth.
What are the IARU regions?
The IARU, like the ITU, is organised into three Regions:
- Region-1: Europe, Africa, Middle East, North Asia.
- Region-2: Americas.
- Region-3: Asia-Pacific.
What is the 6 meter FT8 freq?
FT8 Frequencies
| Band | Frequency MHz | Notes |
|---|---|---|
| 6m | 50.313 | |
| 6m | 50.328 | JS8Call |
| 6m | 50.323 | Intercontinental DX |
| 4m | 70.100 |
What are the psk31 frequencies?
PSK31 Frequencies
| Frequency | Amateur Band |
|---|---|
| 7.040 MHz* | 40 meter (regions 1) |
| 7.070 MHz* | 40 meter (regions 2) |
| 10.142 MHz | 30 meter |
| 14.070 MHz | 20 meter |
What is JS8Call heartbeat?
When you have HB enabled (and AUTO replies enabled) and you first receive a HB from a station, your station will try to send a HEARTBEAT ACK reply to signal to the other operator that you can hear them. If they receive your response, an indicator will be displayed next to your callsign in their heard list.
What mode is JS8Call?
JS8Call uses a custom FT8 modulation called JS8 (Jordan Sherer designed 8-FSK modulation). This is the base RF transport.
What is a ITU zone?
What are ITU and CQ zones used for? ITU and CQ zones are used to help identify where you are in the world. Contests use them to determine which regions you’ve contacted. Due to geographical differences between countries, it’s easier for participants in some countries a higher number of different countries.
What is the transmit frequency of the JT65?
*Do not use a sync frequency less than 10140.2 kHz. The JT65 signal frequency is about 10140.3 to 10140.7 kHz. This transmit signal is within the 10140-10150kHz automatic digital sub-band.
Which is the reference mouse click frequency for JT65?
JT65A may be used in the 500Hz bandwidth segments of bandplans. Normal operation of JT65A is a sync audio frequency of 1270.5Hz. Sync tone is the reference mouse-click frequency for JT65. JT65A signal bandwidth extends about 200Hz above 1270.5Hz sync.
Which is the lowest sync tone for JT65?
Sync tone is the reference mouse-click frequency for JT65. JT65A signal bandwidth extends about 200Hz above 1270.5Hz sync. The lowest tone of the JT65 signal is normally 1270Hz. The system allows approximately +/-600Hz auto-tuning on receive.
Where is JT65A located in the ham band?
Normal activity of JT65A is in the “weak signal” part of the ham bands, near the PSK, MFSK, and Olivia 500 frequencies. JT65A should not be used in parts of the ham bands where faster digital modes are in use.