Step 1. Install the Antenna
The "rubber duckie" whip antenna fits into the hole on top of the transmitter and threads onto a
mounting stud inside. Guide the antenna onto the stud and turn it clockwise to tighten. Do not use
excessive force to tighten the antenna. It only needs to be finger-tight. See page 9 for instructions
on using the Transmitter with a remote antenna.
Step 2. Connect the Transmitter to Power
The T21 is supplied with a wall transformer power supply (TFP 016). Connect the power cord plug to
the "Power" connector on the rear panel of the T21. Then plug the transformer into a 120 Volt, 60 Hz
wall outlet. The indicator light on the front panel of the T21 should glow when the power is
connected.
There is no on/off switch. Due to low energy consumption, the T21 is designed to run continuously.
The wall transformer can be plugged into a switched outlet that turns on when the other sound
equipment is turned on. If turning the T21 on creates a hum or buzz in the sound system, see the
Troubleshooting section on page 9.
Step 3. Audio Connections
If you will be using the T21 with a microphone as a stand-alone system:
Any professional low-impedance microphone may be used with the T21. Plug the microphone into
the concentric jack (“Balanced Audio Input”) on the rear panel of the T21. The T21 supplies positive
DC voltage to power condenser microphones per DIN45596. Make sure the input selector switch is
in the MIC position. Talking into the microphone should cause the audio indicator light to flash on
the front panel.
If you use both the Microphone input and the Audio Input on the T21, the signals will be mixed
together.
If you will be using the T21 with an existing sound system:
Refer to the Overall System Diagram, above. The T21 has been designed to accept virtually any
type of audio input, with up to four different input signals actively mixed together. Following are the
best sources for an audio signal from the sound system:
Desirable Signal Sources:
1st Choice:
TAPE OUT or LINE OUT Jack
2nd Choice:
BOOSTER or BRIDGING Jack
3rd Choice:
Speaker Terminal, or Speaker transformer tap
Page 4
Microphone Wiring Detail
