Batboard

Hi, folks, new guy here. My company uses more than a few CDM1250 radios and I've been charged with getting a voice activated recorder set up.

I've got the signal coming off the back of the radio just fine, and any conversation that comes across as being received by the radio records properly. My problem is this:

Since this is a dispatcher's radio, we need to have the dispatcher voice recorded as well. Where do I find the microphone signal?

http://www.batlabs.com/images/maxrad.gif

That is the mic plug pinout for the older Radius and Maxtrac mobiles, and should be the same for the Waris mobiles. One thing to remember is that the Waris mobiles actually use a ten-pin connector, while the older Radius and Maxtrac used an eight-pin. This means that pin one on the Radius diagram corresponds to pin two on the Waris, and so forth. I have no idea what pins one and ten do, but what you need should be in two through nine.

kf4sqb wrote:One thing to remember is that the Waris mobiles actually use a ten-pin connector, while the older Radius and Maxtrac used an eight-pin. This means that pin one on the Radius diagram corresponds to pin two on the Waris, and so forth. I have no idea what pins one and ten do, but what you need should be in two through nine.

If you use an 8 pin plug and cable (which is a lot easier to come by than 10) the connections are the same.

Motorola designates the outer pins as 9 and 10, and the manual shows them as either keypad or analog inputs depending on which control head schematic you look at.

jackhackett wrote:If you use an 8 pin plug and cable (which is a lot easier to come by than 10) the connections are the same.

Very true, but I was operating under the assumption that he would possibly want to make an internal connection to the mic plug to extract TX audio. However, it certainly may be easier to make a "Y" cable to plug the mic into, plug into the front of the radio, and extract the desired signal from, provided that a ten-pin jack can be located (doesn't the stock mic have a ten-pin plug on it?).

jackhackett wrote:Motorola designates the outer pins as 9 and 10...

That is interesting to know. I have to wonder if they did that for compatibility with older equipment, or to confuse the h#!! out of everyone. I suppose that "9" is beside "1", and "10" is beside "8"?

kf4sqb wrote:I suppose that "9" is beside "1", and "10" is beside "8"?

Nope... 9 is next to 8, 10 is next to 1.
You could think of it as starting with 1 on the second pin, going across to 9, and then wrapping around so 10 is back on the first pin.

Hey, it's Motorola... it doesn't have to make sense!

by the way.. if you did want to wire directly to the socket, pin 10 is towards the buttons on the control head, then pins 1 to 9 moving towards to edge of the board.

jackhackett wrote:Nope... 9 is next to 8, 10 is next to 1.

Now that just doesn't make any sense, but,:

jackhackett wrote:Hey, it's Motorola... it doesn't have to make sense!

How very, very true!!!