12
Re-Assembling the Instrument
Refer to Figure 2.
1. Reinstall the inner and outer instrument covers by reversing the order for removal.
2. Torque all T-10 screws to 9 in-lbs.
3. Torque all T-15 and T-20 screws to 21 in-lbs.
4. Cut out an Option 1E1 label and attach it to the rear panel, near the original serial number label.
Re-Calibrating the Instrument
1. Turn the instrument on and let it warm up for 20 minutes.
2. Using Tables 4-1 and 4-2 in the Post-Repair chapter of the PSG Series Service Guide (part number
E8251-90030) complete the adjustments, in the order listed, for the A10 ALC and the AT1 115 dB
Attenuator.
Verifying Instrument Calibration
Using Tables 4-3 and 4-4 in the Post-Repair chapter of the PSG Series Service Guide (part number
E8251-90030) complete the performance tests, in the order listed, for the A10 ALC and the AT1 116 dB
Attenuator.
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