Table A-1.  Background Power Hum Measurements of DPD Channel II

DISC 1, TRACK 7: (CH. 2 Played at half speed)  

Times are from beginning of track.  

SLOPE

0. 000406

Y-INT

0. 601909

START

END

CYCLES

WAVELEN

HZ

MIDPOINT

RATIO

7.940000

8.625850

25

0.02743400

 36.451

8.2829250

0.607519

84.027914

84.682200

25

0.02617144

 38.210

84.3550570

0.636827

165.381361

166.130522

30

0.02497203

 40.045

165.7559415

0.667413

195.897460

196.752834

35

0.02443926

 40.918

196.3251470

0.681963

249.180454

249.888934

30

0.02361600

 42.344

249.5346940

0.705736

302.335102

303.256735

40

0.02304082

 43.401

302.7959185

0.723354

348.367982

349.157596

35

0.02256040

 44.325

348.7627890

0.738758

502.100499

502.721791

30

0.02070973

 48.286

502.4111450

0.804775

587.995488

588.588889

30

0.01978003

 50.556

588.2921885

0.842601

675.562857

676.230476

35

0.01907483

 52.425

675.8966665

0.873752

770.722290

771.357823

35

0.01815809

 55.072

771.0400565

0.917865

869.842381

870.362290

30

0.01733030

 57.702

870.1023355

0.961707

979.841111

980.339864

30

0.01662510

 60.150

980.0904875

1.002500

1,098.236032

1,098.569660

21

0.01588705

 62.944

1,098.4028460

1.049073

1,190.735238

1,191.350522

40

0.01538210

 65.011

1,191.0428800

1.083510

1,281.227506

1,281.823469

40

0.01489907

 67.118

1,281.5254875

1.118638

1,375.158639

1,375.734785

40

0.01440365

 69.427

1,375.4467120

1.157114

1,472.633651

1,473.188730

40

0.01387697

 72.062

1,472.9111905

1.201030

1,550.182676

1,550.721995

40

0.01348298

 74.168

1,550.4523355

1.236127