Amateur Operators should operate to conventions between band limits

The ACMA in Australia define the edges of each Amateur band. The way in which these bands are utilised is determined through conventions and not law.

The Australian Band Plan describes where certain activities such as SSB, CW, Digital modes should be conducted. These are preferential arrangements that are not enforced.

Awareness of Secondary Service Operations

There are some allocations where Amateur Radio is regarded as a Secondary Service and Amateurs are permitted to use these frequencies on an non-interference basis to Primary users of that spectrum. For example, on the lower half of the Six Metre band, Amateur Radio is a Secondary Service.

Be Aware of your Bandwidth

Operators need to be aware that each transmission occupies a certain amount of bandwidth.  For example, AM transmissions are 6 KHz wide, which means that it occupies spectrum space 3KHz above and 3KHz below the frequency selected on the VFO dial of a transceiver radio.

The Foundation allocation for the 80 Metre band is from 3.5 to 3.7MHz.  If an operator was to select 3.501 MHz and commence an AM transmission, the edge of their 6 KHz transmission bandwidth would be 2 KHz below the bottom edge of the Amateur band. This would not be a legal transmission.

 The table below Identifies the band edges for each Amateur qualification type.

The Band Plan chart below describes these operating conventions in a handy form.  It may also be downloaded from:

https://vkradioamateurs.org/its-my-frequency-and-ill-cry-if-i-want-to/

---