Shure T1 Body-Pack Transmitters
6Preliminary Tests
25C1016 (CC)
2. Set the
RF generator as follows:
Amplitude: –20 dBm
Modulation: 1 kHz
Deviation: 15 kHz
Frequency: T1 operating frequency
3. Connect the audio from the unbalanced output to the audio ana-
lyzer with a 3.3 kΩ load. Turn the Volume control all the way up.
4. For the associated T3 or T4, verify the following:
S audio level is 400 mVrms ("90 mV)
S thd = <0.75%
B: Check the Transmitter
1. Disconnect the signal generator from the receiver. Monitor the
receiver’s unbalanced audio output with a 3.3 kΩ load and the
audio analyzer. Check that the receiver’s Volume control is still
at its maximum setting.
2. Unmute the transmitter and turn its gain to the minimum setting.
Connect an input cable as follows:
T1 and T1G: Use adapter cables to input the audio to the body-
pack input.
T1P: Disassemble the case, remove the microphone, and attach
the adapter cable to the four-pin header of the audio input.
3. Inject a 775 mV, 1 kHz signal from the audio analyzer into the
adapter cable and verify the following:
S the amplitude from receiver’s unbalanced output equals
400 mVrms ("90 mV)
S thd = <0.75%
4. Change the frequency of the audio generator to 100 Hz and dis-
engage the 400 Hz high-pass filter from the audio analyzer.
Verify that the audio level is –1 dB ("0.7 dB) relative to the level
measured in step 3.
5. Change the frequency of the audio generator to 10 kHz and re-
engage the 400 Hz high-pass filter. Verify that the audio level,
relative to that measured in step 3, is 0 dB, "1 dB.
Units That Pass
If the system components pass these tests and the microphone is
good, then the system is functioning as expected and shouldn’t require
tuning and alignment. Inform the customer that the product has retested
within specifications.
