Crystal Measurements for IF
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 design of ladder filters -
columns 4,5,9 & 10 are required when using the Giangrandi web site - tunable crystal oscillators whether by capacitor or varicap diode
- The design of full lattice and half lattice filters using columns 9 and 10
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
for C1 in pF
Parallel
Resonance
Resonance
Freq.
MHz
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:
- This information is based on sample sizes or one or two so readers should use it as an indication of what is possible and conduct their own tests on their own components for more precise results.
- Trailing (right hand) zeroes in all frequencies have been omitted.
The switch is shown in the short circuit position.