Frequency Response - Shure U2 Service Manual

25B1022 (AG)

Frequency Response

Values between board versions may vary slightly; the following values
are typical values.
1. With the transmitter set to minimum gain, apply 100 mVrms
at 1 kHz to its input.
If you have a version with a 6 dB pad (JB model),
apply 200 mVrms at 1 kHz.
2. Connect the audio analyzer's input to the unbalanced output
of the U4 receiver.
3. Make sure the receiver volume control is set to maximum.
4. With respect to the 1 kHz level, measure –8.5 dBu ± 2 dB.
5. Change the frequency to 100 Hz and verify that the measure-
ment from the U4 unbalanced output is within ± 3.0 dB with
respect to the 1 kHz level.
6. Change the frequency to 10 kHz and verify that the measure-
ment from the U4 unbalanced output is within ± 1.5 dB with
respect to the 1 kHz level.
Shure U2 Hand-Held UHF Transmitter
Preliminary Tests
7