3-6 ME7838A/E System Verification Procedure—Waveguide Millimeter-Wave System Configuration
3-14
PN: 10410-00306 Rev. F
VectorStar ME7838 Series MM
Figure 3-4.
RF Measurement Chart
X
(Ref + X)
(Ref - X)
(Ref)
Phasor Interaction
The first three columns are conversion ta-
bles for return loss, reflection coefficient,
and SWR.
The last four columns are values for inter-
actions of a small phasor X with a large
phasor (unity reference) expressed in dB
related to the reference.
The RF Measurement Chart can be used
to determine the uncertainty due to
bridge/autotester VNA directivity. The
“X dB Below Reference” column represents
the difference between the directivity and
the measured reflection (return loss). The
“Ref + X dB” and “Ref – X dB” values are
360 . Therefore, the peak-to-peak ripple
(1 ± X) is the total measurement uncer-
tainty caused by the error signal.
For example, if a 30 dB return loss is mea-
sured with a 40 dB directivity autotester,
the X dB Below Reference value is 10 dB.
The Ref + X dB value is 2.3866 dB and the
Ref – X dB value is 3.3018 dB.
The actual return loss is between
27.6134 dB (– 30 + 2.3866) and
33.3018 dB (– 30 – 3.3018). The
peak-to-peak ripple on a swept measure-
ment will be 5.6884 dB. If the error and
directivity signals are equal, the Ref + X dB
value equals 6 dB (voltage doubling
causes a 6 dB change) and the Ref – X dB
value becomes infinite, since the two sig-
nals are equal in amplitude and 180 out of
phase (zero voltage).
SWR
Reflection
Coefficient
Return
Loss
(dB)
Relative to Unity Reference
X dB
Below
Reference
Ref + X
(dB)
Ref - X
(dB)
Ref
X
Pk to Pk Ripple
(dB)
17.3910
0.8913
1
1
5.5350
-19.2715
24.8065
8.7242
0.7943
2
2
5.0780
-13.7365
18.8145
5.8480
0.7079
3
3
4.6495
-10.6907
15.3402
4.4194
0.6310
4
4
4.2489
-8.6585
12.9073
3.5698
0.5623
5
5
3.8755
-7.1773
11.0528
3.0095
0.5012
6
6
3.5287
-6.0412
9.5699
2.6146
0.4467
7
7
3.2075
-5.1405
8.3480
2.3229
0.3981
8
8
2.9108
-4.4096
7.3204
2.0999
0.3548
9
9
2.6376
-3.8063
6.4439
1.9250
0.3162
10
10
2.3866
-3.3018
5.6884
1.7849
0.2818
11
11
2.1567
-2.8756
5.0322
1.6709
0.2512
12
12
1.9465
-2.5126
4.4590
1.5769
0.2239
13
13
1.7547
-2.2013
3.9561
1.4985
0.1995
14
14
1.5802
-1.9331
3.5133
1.4326
0.1778
15
15
1.4216
-1.7007
3.1224
1.3767
0.1585
16
16
1.2778
-1.4988
2.7766
1.3290
0.1413
17
17
1.1476
-1.3227
2.4703
1.2880
0.1259
18
18
1.0299
-1.1687
2.1986
1.2528
0.1122
19
19
0.9237
-1.0337
1.9574
1.2222
0.1000
20
20
0.8279
-0.9151
1.7430
1.1957
0.0891
21
21
0.7416
-0.8108
1.5524
1.1726
0.0794
22
22
0.6639
-0.7189
1.3828
1.1524
0.0708
23
23
0.5941
-0.6378
1.2319
1.1347
0.0631
24
24
0.5314
-0.5661
1.0975
1.1192
0.0562
25
25
0.4752
-0.5027
0.9779
1.1055
0.0501
26
26
0.4248
-0.4466
0.8714
1.0935
0.0447
27
27
0.3796
-0.3969
0.7765
1.0829
0.0398
28
28
0.3391
-0.3529
0.6919
1.0736
0.0355
29
29
0.3028
-0.3138
0.6166
1.0653
0.0316
30
30
0.2704
-0.2791
0.5495
1.0580
0.0282
31
31
0.2414
-0.2483
0.4897
1.0515
0.0251
32
32
0.2155
-0.2210
0.4365
1.0458
0.0224
33
33
0.1923
-0.1967
0.3890
1.0407
0.0200
34
34
0.1716
-0.1751
0.3467
1.0362
0.0178
35
35
0.1531
-0.1558
0.3090
1.0322
0.0158
36
36
0.1366
-0.1388
0.2753
1.0287
0.0141
37
37
0.1218
-0.1236
0.2454
1.0255
0.0126
38
38
0.1087
-0.1100
0.2187
1.0227
0.0112
39
39
0.0969
-0.0980
0.1949
1.0202
0.0100
40
40
0.0864
-0.0873
0.1737
1.0180
0.0089
41
41
0.0771
-0.0778
0.1548
1.0160
0.0079
42
42
0.0687
-0.0693
0.1380
1.0143
0.0071
43
43
0.0613
-0.0617
0.1230
1.0127
0.0063
44
44
0.0546
-0.0550
0.1096
1.0113
0.0056
45
45
0.0487
-0.0490
0.0977
1.0101
0.0050
46
46
0.0434
-0.0436
0.0871
1.0090
0.0045
47
47
0.0387
-0.0389
0.0776
1.0080
0.0040
48
48
0.0345
-0.0346
0.0692
1.0071
0.0035
49
49
0.0308
-0.0309
0.0616
1.0063
0.0032
50
50
0.0274
-0.0275
0.0549
1.0057
0.0028
51
51
0.0244
-0.0245
0.0490
1.0050
0.0025
52
52
0.0218
-0.0218
0.0436
1.0045
0.0022
53
53
0.0194
-0.0195
0.0389
1.0040
0.0020
54
54
0.0173
-0.0173
0.0347
1.0036
0.0018
55
55
0.0154
-0.0155
0.0309
1.0032
0.0016
56
56
0.0138
-0.0138
0.0275
1.0028
0.0014
57
57
0.0123
-0.0123
0.0245
1.0025
0.0013
58
58
0.0109
-0.0109
0.0219
1.0022
0.0011
59
59
0.0097
-0.0098
0.0195
1.0020
0.0010
60
60
0.0087
-0.0087
0.0174
Содержание VectorStar ME7838 Series
Страница 2: ......
Страница 14: ...1 6 ME7838 Series VNA System Overview General Information 1 6 PN 10410 00306 Rev F VectorStar ME7838 Series MM ...
Страница 28: ...1 7 Recommended Test Equipment General Information 1 20 PN 10410 00306 Rev F VectorStar ME7838 Series MM ...
Страница 76: ...4 10 ME7838G System Operation Theory Of Operation 4 16 PN 10410 00306 Rev F VectorStar ME7838 Series MM ...
Страница 94: ...5 3 ALC Level Calibration Adjustment 5 18 PN 10410 00306 Rev F VectorStar ME7838 Series MM ...
Страница 176: ...A 3 ME7838G WR05 S Parameter Measurements Test Record Test Records A 4 PN 10410 00306 Rev F VectorStar ME7838 Series MM ...
Страница 177: ......