Custom Products for the Digital Radio Amateur Enthusiast

Background:

Our DRA-30, '34, '45, '65, 'SR-RJ45, and '100-RJ45 has only one receiver input and it allows operation at any baud rate. On these models, there is no header/jumper to select receiver audio baud rates like on other models. It's up to you to wire the radio up using the proper audio (type) for a given operating speed.

Our DRA-36, '50, '70, '80, '100-DIN6, and 'SR-DIN6 all have a Mini-DIN-6 radio connector. Selection of receiver audio between 1200/9600 baud is done by moving an on-board jumper. No soldering is required.

Switching receive baud rate isn't really a function of the DRA - it's simply a selection of two types of audio that's supplied to the radio adapter interface. All DRA's can process 1200 or 9600 baud, or even baud (transfer) rates way beyond 9600. Most radios with a dedicated data port have both "types" of receiver audio available at the DIN-6 connector, and they are on two different pins. The 1200/9600 baud rate header jumper on the DRA-DIN-6 adapter (or on DRA's that have the DIN-6 connector) simply selects which audio source is delivered to the input of the CM119A sound card chip. This selection has everything to do with changing the available source, and nothing to do with other circuitry on the radio adapter.

For transmit audio, there are NO baud rate headers or jumpers. Switching the 1200/9600 baud jumper does NOT make any changes where transmit audio is concerned. Changes in transmit baud rate are done in the program that's driving the DRA.

Email Kevin Custer for additional support.