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PPM3 Page 22
8. Plug your phone line from the wall jack into the “Telephone Input” on
the back of the PPM3.
9. In order to control a phone line you need to connect a phone to the
“Telephone Output” of the PPM3. If you lift the receiver on the phone you
should be able to hear the dial tone through the unit. In order to test the
unit properly you’ll have to have someone call you. You should be able to
hear both side of the conversation and adjust your levels until they’re
where you want them.
10. Once you know that the system works you’ll simply need to plug the
line level output from the PPM3 to the line level input on your transmitter.
Have another friend call you (assuming you have more than one friend) or
bug the same friend and see how it sounds on the air.
USING THE PPM3
Now that you know that your PPM3 is fully operational you can begin using
it. When broadcasting a phone conversation you’ll need to speak into the
phone’s handset in order for the person on the other end of the line to hear
you; the audio mix on the Line Out from the PPM3 does not get fed back into
the phone line. (this is not a “full hybrid” phone interface and that’s why it
doesn’t cost hundreds of dollars!) When you return to your normal
programming you can speak into the mic like a typical DJ. A speakerphone
may be the best option for use with the PPM3, allowing you to continue using
the higher quality microphone audio for the “over-the-air” signal but still allow
the person on the other end of the phone to hear you. This solution may be
very cost effective for those users who want a full hybrid system but don’t
want to spend hundreds of dollars.
You can take the line level output from your transmitter (the loop output on
an FM25B or FM100B) and, as you did when initially testing the kit, connect it
to the line level input on a stereo or other device so that you can hear what’s
being broadcast. Be careful not to have the audio too loud so that it doesn’t
get picked up by the mic and sent out over-the-air.
NOTE: An important thing to do when you’re finished with your phone call is
to press the Phone Mute button to turn off the phone line section of your kit. If
you forget to do this and your caller is still on the line anything they say will go
directly to your transmitter and be broadcast. Also, if the phone rings the
sound will go out over the air. Get in the habit of pressing the Phone Mute
button after each phone call.