Tonekey Level Detection; Noise Squelch Alignment; Audio Alignment; Audio Peak Light Reference Setting Procedure - Shure PG4 Service Manual

4. Set signal generator level= -100 dBm.
5. Set signal generator to corresponding frequency.
6. Measure SINAD at TPR (Pin 7 of IC610) to be equal to or greater than 12 dB.

TONEKEY LEVEL DETECTION

1. Verify the receiver is set to ATE mode Fmid frequency.
2. Set the RF generator's amplitude to -70dBm and carrier frequency to ATE Fmid frequency.
3. Apply a dual-sine modulation function with FM rate1=1KHz and FM rate2=32.768KHz and ampl=12%. Set the deviation to 37.5KHz.
For the Q11 band Apply a dual-sine modulation function with FM rate1=1KHz and FM rate2=32.768KHz and ampl=16%. Set the devi-
ation to 27.5KHz. Verify test point TP_TK measures between 1.00Vdc to 3.5 Vdc.
NOISE SQUELCH ALIGHNMENT
1. Verify the receiver is set to ATE mode Fmid frequency.
2. Verify RF generator is set to the ATE Fmid frequency a dual-sine modulation function with FM rate1 = 1KHz and FM rate2 =
32.768KHz and ampl=12%. Set the deviation to 37.5KHz. *For the Q11 band Apply a dual-sine modulation function with FM rate1 =
1KHz and FM rate2 = 32.768KHz and ampl=16%. Set the deviation to 27.5KHz. Set the RF signal generator amplitude to -95dBm.
3. Adjust the RF input level to find the 30dB SINAD point (A-weighted), measured at TPR. (note that the 30 dB SINAD at TPR corre-
sponds to approximately 40 dB SINAD at ¼" or XLR outputs).
4. Adjust TR220 for 1 Vdc ± 0.2Vdc at TP_N (Noise_A2D).

AUDIO ALIGNMENT

1. Verify RF generator is set to the ATE Fmid frequency a dual-sine modulation function with FM rate1 = 1KHz and FM rate2 = 32.768KHz and
ampl=12%. Set the deviation to 37.5KHz. *For the Q11 band Apply a dual-sine modulation function with FM rate1=1KHz and FM
rate2=32.768KHz and ampl=16%. Set the deviation to 27.5KHz.
2. Set the RF signal generator amplitude to -70dBm.
3. Adjust TR100 for -3.3dBu ± 0.25dBu at the ¼" output (TPUNBAL).

AUDIO PEAK LIGHT REFERENCE SETTING PROCEDURE

1. Apply a dual-sine modulation function with FM rate1 = 1KHz and FM rate2 = 32.768KHz and ampl=12%. Set the deviation to 47.0KHz.
2. Enter into the micro controller reference level-programming mode. Sequence through the three selections until the "A" is flashing. Let the "A"
flash until it times out and the LED display returns to Fmid. This is to set the audio LED peak light threshold.
The Alignment is now completed.
25A1104 (Rev.1)
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