Crystal Measurements for IF Filters

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A series of measurements was made on a range of crystals and a few ceramic resonators and the results are shown in the table below. These results are useful for:

The measurement set up is shown first.

1

2

3

4

5

6

7

8

9

10



Series Resonant Frequency in MHz with the following value

for C1 in pF

Parallel

Resonance

Freq.

MHz

Type/Pkg

4p7

10p

27p

56p

120p

220p

Short circuit

Short circuit

2.45

CR

2.5022

2.4835

2.4482

2.4182

2.3902

2.3741

2.3506

2.5245

2.4576

X / 3

2.4584

2.45798

2.45764

2.4575

2.45744

2.4574

2.45738

2.45993

2.5

X / 2

2.50091

2.50044

2.50005

2.49989

2.4998

2.49977

2.49972

2.5026

3.39

X / 1

3.39151

3.39078

3.39018

3.3899

3.39876

3.3897

3.38962

3.39415

3.39211

X / 1

3.39347

3.39276

3.39216

3.3919

3.39175

3.39169

3.39163

3.39635

3.39895

X / 1

3.40072

3.3998

3.39903

3.3987

3.39853

3.39844

3.39834

3.4043

3.39895

X / 1

3.40074

3.3998

3.39903

3.39869

3.39851

3.39842

3.39832

3.40443

3.57954

X / 1

3.5817

3.5804

3.57925

3.57877

3.57852

3.57838

3.57825

3.58613

7.055

X / 1

7.06077

7.05813

7.05558

7.05438

7.05364

7.05336

7.05039

7.0677

9

X /3 a

9.00682

9.00362

9.00078

8.9996

8.99885

8.99865

8.99824

9.0159

9

X / 3 a

9.00726

9.0038

9.00094

8.99953

8.99887

8.99861

8.99817

9.01712

9

X / 5 b

9.00757

9.00407

9.00083

8.9994

8.99858

8.99821

8.99776

9.01696

10

X / 4

10.00812

10.00424

10.00084

9.99938

9.99848

9.99816

9.99789

10.01909

12

X / 4

12.00825

12.00437

12.00076

11.99896

11.99794

11.99755

11.99707

12.01772

12

CR

12.26818

12.16535

11.999

11.8937

11.81071

11.7739

11.71744

12.41283

14

X / 3 *

14.01561

14.01035

14.0057

14.0037

14.00242

14.00196

14.00113

14.02909

20

X / 4 *

20.01398

20.00707

20.0014

19.99847

19.99724

19.99675

19.99586

20.0326

20

CR

20.00876

19.9901

19.96921

19.9562

19.94966

19.94618

19.93958

20.03948

Type/Package Keys:

CR

Ceramic Resonator

X

Quartz crystal

*

High side spurious noted

1

HC6/u solder seal

3

HC18/u solder seal

5

HC18/u size resistance weld

2

HC6/u size cold weld

4

HC18/u size cold weld

a

IQ Designs non matched series

b

PA3AKE low dust high IP3 type





Notes:

The switch is shown in the short circuit position.