...

MWAX_VCS - This is the standard voltage capture mode where incoming voltages from the receivers are written to disk (each MWAX server writes 1.28 MHz of the 30.72 MHz bandwidth, or 1.6384 MHz when in oversampling mode).
MWAX_BUFFER - In this mode, voltages are captured from receivers, but not written to disk unless triggered to do so by the M&C system (this could be via a VO event trigger or with human intervention).

...

The below table summarises the Voltage Capture (VCS) data rates with .

Oversampled=”No” has 1.28 MHz channels, 0.781 μs critically sampled.

Oversampled=”Yes” has 1.6384 MHz channels, 0.781 μs oversampled channels.

Rows in blue represent the VCS options available in semester 2025A.

		1 Channel		24 Channels
Tiles	Oversampled	GB/s	TB/hr	GB/s	TB/hr
128	No	0.66	2.37	15.83	56.98
128	Yes	0.84	3.04	20.26	72.93
136	No	0.70	2.52	16.82	60.54
144	No	0.74	2.67	17.81	64.10
152	No	0.78	2.82	18.79	67.66
160	No	0.82	2.97	19.78	71.22
168	No	0.87	3.12	20.77	74.78
176	No	0.91	3.26	21.76	78.34
184	No	0.95	3.41	22.75	81.90
192	No	0.99	3.56	23.74	85.47
200	No	1.03	3.71	24.73	89.03
208	No	1.07	3.86	25.72	92.59
216	No	1.11	4.01	26.71	96.15
224	No	1.15	4.15	27.70	99.71
232	No	1.20	4.30	28.69	103.27
240	No	1.24	4.45	29.68	106.83
248	No	1.28	4.60	30.66	110.39
256	No	1.32	4.75	31.65	113.95

Correlator

Correlator Modes

The MWAX Correlator has been designed to be flexible with the frequency and time averaging modes available to researchers. Each mode combines a frequency averaging setting and an time averaging setting.

Note
The MWAX software is flexible and is able to handle all available modes, but is limited by the hardware the software runs on. As a result, for any particular MWA configuration of N tiles, not all modes are able to be run in real time.

...

Info
Note: when in extended / long baseline configuration, most science cases will require the 10 kHz, 0.5 sec mode at a minimum unless fringe stopping feature is enabled

Data Rates at

...

128T

cell values = Total data size (GB/s)

Time Resolution (s)

fscrunch

fine chans

per coarse

fine chan

width kHz

0.25

0.5

1.0

2.0

4.0

8.0

1

1280

6400	0.2

645

161.

50

69

322

80.

75

85

161

40.

38

42

80

20.

69

21

40

10.

34

11

20

5.

17

2
05

640

3200	0.4

322

80.

75

cell values = Total data size (GB/s)

Time Resolution (s)

fscrunch

fine chans

per coarse

fine chan

width kHz

0.25

0.5

1.0

2.0

4.0

8.0

1

6400

0.2

227.87

113.93

56.97

28.48

14.24

7.12

2

3200

0.4

113.93

56.97

28.48

14.24

7.12

3.56

85

161.38

80.69

40.34

20.17

10.09

4

320

0.8

161.38

80.69

40.34

20.17

10.09

5.04

5

256

1.0

129.10

64.55

32.28

16.14

8.07

4.03

8

160

1.6

80.69

40.34

20.17

10.09

5.04

2.52

10

128

2.0

64.55

32.28

16.14

8.07

4.03

2.02

16

80

3.2

40.34

20.17

10.09

5.04

2.52

1.26

20

64

4.0

32.28

16.14

8.07

4.03

2.02

1.01

25

51.2

5.0

25.82

12.91

6.46

3.23

1.61

0.81

32

40

6.4

20.17

10.09

5.04

2.52

1.26

0.63

40

32

8.0

16.14

8.07

4.03

2.02

1.01

0.50

50

25.6

10.0

12.91

6.46

3.23

1.61

0.81

0.40

64

20

12.8

10.09

5.04

2.52

1.26

0.63

0.32

80

16

16.0

8.07

4.03

2.02

1.01

0.50

0.25

100

12.8

20.0

6.46

3.23

1.61

0.81

0.40

0.20

128

10

25.6

5.04

2.52

1.26

0.63

0.32

0.16

160

8

32.0

4.03

2.02

1.01

0.50

0.25

0.13

200

6.4

40.0

3.23

1.61

0.81

0.40

0.20

0.10

256

5

51.2

2.52

1.26

0.63

0.32

0.16

0.08

320

4

64.0

2.02

1.01

0.50

0.25

0.13

0.06

400

3.2

80.0

1.61

0.81

0.40

0.20

0.10

0.05

640

2

128.0

1.01

0.50

0.25

0.13

0.06

0.03

800

1.6

160.0

0.81

0.40

0.20

0.10

0.05

0.03

1280

1

256.0

0.50

0.25

0.13

0.06

0.03

0.02

1600

0.8

320.0

0.40

0.20

0.10

0.05

0.03

0.01

3200

0.4

640.0

0.20

0.10

0.05

0.03

0.01

6400

0.2

1,280.0

0.10

0.05

0.03

0.01

0.00

Data Rates at 152T

4	1600	0.8
40.42	20.21	10.11	5.05	2.53

56

40.

97

42

28

20.

48

21

14

10.

24

11

7

5.

12

05

3

2.

56

53

1.

78

5	1280	1.0
26

45

32.

57

34

22

16.

79

17

11

8.

39

08

5

4.

70

04

2.

85

02

1.

42

8	800	1.6
01

28

20.

48

21

14

10.

24

11

7

5.

12

05

3

2.

56

53

1.

78

26

0.

89

10	640	2.0
63

22

16.

79

17

11

8.

39

08

5

4.

70

04

2.

85

02

1.

42

01

0.

71

16	400	3.2
51

14

10.

24

11

7

5.

12

05

3

2.

56

53

1.

78

26

0.

89

63

0.

45

20	320	4.0
32

11

8.

39

08

5

4.

70

04

2.

85

02

1.

42

01

0.

71

51

0.

36

25	256	5.0
25

9

6.

11

47

4

3.

56

23

2

1.

28

62

1

0.

14

81

0.

57

40

0.

28

32	200	6.4
20

7

5.

12

05

3

2.

56

53

1.

78

26

0.

89

63

0.

45

32

0.

22

40	160	8.0
16

5

4.

70

04

2.

85

02

1.

42

01

0.

71

51

0.

36

25

0.

18

50	128	10.0
13

4

3.

56

23

2

1.

28

62

1

0.

14

81

0.

57

40

0.

28

20

0.

14

64	100	12.8
10

3

2.

56

53

1.

78

26

0.

89

63

0.

45

32

0.

22

16

0.

11

08
80	80	16.0	2.

85

02

1.

42

01

0.

71

51

0.

36

25

0.

18

13

0.

09

100	64	20.0
06

2

1.

28

62

1

0.

14

81

0.

57

40

0.

28

20

0.

14

10

0.

07

05
128	50	25.6	1.

78

26

0.

89

63

0.

45

32

0.

22

16

0.

11

08

0.

06

04
160	40	32.0	1.

42

01

0.

71

51

0.

36

25

0.

18

13

0.

09

06

0.

04

200	32	40.0
03

1

0.

14

81

0.

57

40

0.

28

20

0.

14

10

0.

07

05

0.

04

03
256	25	51.2	0.

89

63

0.

45

32

0.

22

16

0.

11

08

0.

06

04

0.

03

02
320	20	64.0	0.

71

51

0.

36

25

0.

18

13

0.

09

06

0.

04

03	0.02
400	16	80.0	0.

57

40

0.

28

20

0.

14

10

0.

07

05

0.

04

03

0.

02

01
640	10	128.0	0.

36

25

0.

18

13

0.

09

06

0.

04

03	0.02	0.01
800	8	160.0	0.

28

20

0.

14

10

0.

07

05

0.

04

03

0.

02

01	0.01
1280	5	256.0	0.

18

13

0.

09

06

0.

04

03

0.02

0.01

0

<0.01
1600	4	320.0	0.

14

10

0.

07

05

0.

04

03

0.

02

01	0.01	<0.01
3200	2	640.0	0.

07

05

0.

04

03

0.

02

01	0.01	<0.01	<0.01
6400	1	1,280.0	0.

04

03

0.

02

01

0.01

<0.01

Data Rates at

...

184T

cell values = Total data size (GB/s)

Time Resolution (s)

fscrunch

fine chans

per coarse

fine chan

width kHz

0.25

0.5

1.0

2.0

4.0

8.0

1

6400

0.2

204

333.

55

72

102

166.

28

86

51

83.

14

43

25

41.

57

72

12

20.

78

86

6

10.

39

43
2	3200	0.4

102

166.

28

86

51

83.

14

43

25

41.

57

72

12

20.

78

86

6

10.

39

43

3

5.

20

21
4	1600	0.8

51

83.

14

43

25

41.

57

72

12

20.

78

86

6

10.

39

43

3

5.

20

21

1

2.

60

61
5	1280	1.0

40.91

20.46

10.23

5.11

2.56

1.28

66.74	33.37	16.69	8.34	4.17	2.09
8	800	1.6

25

41.

57

72

12

20.

78

86

6

10.

39

43

3

5.

20

21

1

2.

60

61

0

1.

80

30
10	640	2.0

20.46

10.23

5.11

2.56

1.28

0.64

33.37	16.69	8.34	4.17	2.09	1.04
16	400	3.2

12.78

6.39

3.20

1.60

0.80

0.40

5.11

20.86	10.43	5.21	2.61	1.30	0.65
20	320	4.0

10.23

16.69

8.34

4.17

2.

56

09

1.

28

04

0.

640.32

52
25	256	5.0

8

13.

18

35

4

6.

09

67

2

3.

05

34

1.

02

67

0.

51

83

0.

263.20

42
32	200	6.4

6.39

10.43

5.21

2.61

1.

60

30

0.

80

65

0.

40

33

0.20

40	160	8.0

5.11

8.34

4.17

2.

56

09

1.

28

04

0.

64

52

0.

320.16

26
50	128	10.0

4

6.

09

67

2

3.

05

34

1.

02

67

0.

51

83

0.

26

42

0.

13

21
64	100	12.8

3

5.

20

21

1

2.

60

61

0

1.

80

30

0.

40

65

0.

20

33

0.

10

16
80	80	16.0	4.17	2.

56

09

1.

28

04

0.

64

52

0.

32

26

0.

16

13

0.08

100	64	20.0

2

3.

05

34

1.

02

67

0.

51

83

0.

26

42

0.

13

21

0.

06

10
128	50	25.6

1

2.

60

61

0

1.

80

30

0.

40

65

0.

20

33

0.

10

16

0.

05

08
160	40	32.0

1

2.

28

09

0

1.

64

04

0.

32

52

0.

16

26

0.

08

13

0.

04

07
200	32	40.0	1.

02

67

0.

51

83

0.

26

42

0.

13

21

0.

06

10

0.

03

05
256	25	51.2

0

1.

80

30

0.

40

65

0.

20

33

0.

10

16

0.

05

08

0.

02

04
320	20	64.0

0

1.

64

04

0.

32

52

0.

16

26

0.

08

13

0.

04

07

0.

02

03
400	16	80.0	0.

51

83

0.

26

42

0.

13

21

0.

06

10

0.

03

05

0.

02

03
640	10	128.0	0.

32

52

0.

16

26

0.

08

13

0.

04

07

0.

02

03

0.

01

02
800	8	160.0	0.

26

42

0.

13

21

0.

06

10

0.

03

05

0.

02

03	0.01
1280	5	256.0	0.

16

26

0.

08

13

0.

04

07

0.

02

03

0.

01

02

<0

0.01
1600	4	320.0	0.

13

21

0.

06

10

0.

03

05

0.

02

03

0.01

<0

0.01
3200	2	640.0	0.

06

10

0.

03

05

0.

02

03

0.01

<0

0.01	<0.01
6400	1	1,280.0	0.

03

05

0.

02

03

0.01

<0

0.01

<0.01

Data Rates at

...

200T

cell values = Total data size (GB/s)

Time Resolution (s)

fscrunch

fine chans

per coarse

fine chan

width kHz

0.25

0.5

1.0

2.0

4.0

8.0

1

6400

0.2

182

394.

49

20

91

197.

25

10

45

98.

62

55

22

49.

81

27

11

24.

41

64

5

12.

70

32
2	3200	0.4

91

197.

25

10

45

98.

62

55

22

49.

81

27

11

24.

41

64

5

12.

70

32

2

6.

85

16
4	1600	0.8

45

98.

62

55

22

49.

81

27

11

24.

41

64

5

12.

70

32

2

6.

85

16

1

3.

43

08
5	1280	1.0

36.50

18.25

	78.84	39.42	19.71	9.

12

85

4.

56

93

2.

28

46

1.14

8	800	1.6

22

49.

81

27

11

24.

41

64

5

12.

70

32

2

6.

85

16

1

3.

43

08

0

1.

71

54
10	640	2.0

18.25

39.42

19.71

9.

12

85

4.

56

93

2.

28

46

1.

140.57

23
16	400	3.2

11.41

5.70

2.85

1.43

0.71

0.36

24.64	12.32	6.16	3.08	1.54	0.77
20	320	4.0	19.71	9.

12

85

4.

56

93

2.

28

46

1.

14

23

0.

570.29

62
25	256	5.0	15.77	7.

30

88

3.

65

94

1.

82

97

0.

91

99

0.

46

49

0.23

2.85

32	200	6.4

5.70

12.32

6.16

3.08

1.

43

54

0.

71

77

0.

36

38

0.18

40	160	8.0	9.85	4.

56

93

2.

28

46

1.

14

23

0.

57

62

0.

29

31

0.14

50	128	10.0	7.88	3.

65

94

1.

82

97

0.

91

99

0.

46

49

0.

23

25

0.11

64	100	12.8

2

6.

85

16

1

3.

43

08

0

1.

71

54

0.

36

77

0.

18

38

0.

09

19
80	80	16.0	4.93	2.

28

46

1.

14

23

0.

57

62

0.

29

31

0.

14

15

0.07

100	64	20.0

1

3.

82

94

0

1.

91

97

0.

46

99

0.

23

49

0.

11

25

0.

06

12
128	50	25.6

1

3.

43

08

0

1.

71

54

0.

36

77

0.

18

38

0.

09

19

0.

04

10
160	40	32.0

1

2.

14

46

0

1.

57

23

0.

29

62

0.

14

31

0.

07

15

0.

04

08
200	32	40.0

0

1.

91

97

0.

46

99

0.

23

49

0.

11

25

0.

06

12

0.

03

06
256	25	51.2

0

1.

71

54

0.

36

77

0.

18

38

0.

09

19

0.

04

10

0.

02

05
320	20	64.0

0

1.

57

23

0.

29

62

0.

14

31

0.

07

15

0.

04

08

0.

02

04
400	16	80.0	0.

46

99

0.

23

49

0.

11

25

0.

06

12

0.

03

06

0.

01

03
640	10	128.0	0.62	0.

29

31

0.

14

15

0.

07

08

0.04

0.02

0.01

800	8	160.0	0.

23

49

0.

11

25

0.

06

12

0.

03

06

0.

01

03

0.

01

02
1280	5	256.0	0.

14

31

0.15

0.

07

08

0.04

0.02

0

.01<0

.01
1600	4	320.0

0.25

0.

11

12

0.06

0.03

0.

01

02

0.01

<0.01

3200	2	640.0	0.12	0.06

0

0.03

0.

01

02

0

.01<0

.01	<0.01
6400	1	1,280.0	0.

03

06

0.

01

03

0.

01

02

<0

0.01

<0.01

Data Rates at

...

256T

cell values = Total data size (GB/s)

Time Resolution (s)

fscrunch

fine chans

per coarse

fine chan

width kHz

0.25

0.5

1.0

2.0

4.0

8.0

1

6400

1280	0.2	645.50	322.75	161.

69

38

80.

85

69

40.

42

34

20.

21

10.11

5.05

2
17

3200

640	0.4

80

322.

85

75

40

161.

42

38

20

80.

21

69

10

40.

11

34

5

20.

05

17

2

10.

53

4
09

1600

320	0.8	161.38	80.69	40.

42

34

20.

21

17

10.

11

09

5.

052.53

5	256	1.
04

26

5

1280

1.0

32.34

16.17

8.08

4.04

2.02

1.01

8

800

1.6

20.21

10.11

5.05

2.53

1.26

0.63

10

640

2.0

16.17

8.08

4.04

2.02

1.01

0.51

16

400

3.2

10.11

5.05

2.53

1.26

0.63

0.32

20

320

4.0

8.08

4.04

2.02

1.01

0.51

0.25

25

256

5.0

6.47

3.23

1.62

0.81

0.40

0.20

32

200

6.4

5.05

2.53

1.26

0.63

0.32

0.16

40

160

8.0

4.04

2.02

1.01

0.51

0.25

0.13

50

128

10.0

3.23

1.62

0.81

0.40

0.20

0.10

64

100

12.8

2.53

1.26

0.63

0.32

0.16

0.08

80

16.0

2.02

1.01

0.51

0.25

0.13

0.06

100

64

20.0

1.62

0.81

0.40

0.20

0.10

0.05

128

50

25.6

1.26

0.63

0.32

0.16

0.08

0.04

160

40

32.0

1.01

0.51

0.25

0.13

0.06

0.03

200

32

40.0

0.81

0.40

0.20

0.10

0.05

0.03

256

25

51.2

0.63

0.32

0.16

0.08

0.04

0.02

320

20

64.0

0.51

0.25

0.13

0.06

0.03

0.02

400

16

80.0

0.40

0.20

0.10

0.05

0.03

0.01

640

10

128.0

0.25

0.13

0.06

0.03

0.02

0.01

800

8

160.0

0.20

0.10

0.05

0.03

0.01

1280

5

256.0

0.13

0.06

0.03

0.02

0.01

<0.01

1600

4

320.0

0.10

0.05

0.03

0.01

<0.01

3200

2

640.0

0.05

0.03

0.01

<0.01

6400

1

1,280.0

0.03

0.01

<0.01

0	129.10	64.55	32.28	16.14	8.07	4.03
8	160	1.6	80.69	40.34	20.17	10.09	5.04	2.52
10	128	2.0	64.55	32.28	16.14	8.07	4.03	2.02
16	80	3.2	40.34	20.17	10.09	5.04	2.52	1.26
20	64	4.0	32.28	16.14	8.07	4.03	2.02	1.01
25	51.2	5.0	25.82	12.91	6.46	3.23	1.61	0.81
32	40	6.4	20.17	10.09	5.04	2.52	1.26	0.63
40	32	8.0	16.14	8.07	4.03	2.02	1.01	0.50
50	25.6	10.0	12.91	6.46	3.23	1.61	0.81	0.40
64	20	12.8	10.09	5.04	2.52	1.26	0.63	0.32
80	16	16.0	8.07	4.03	2.02	1.01	0.50	0.25
100	12.8	20.0	6.46	3.23	1.61	0.81	0.40	0.20
128	10	25.6	5.04	2.52	1.26	0.63	0.32	0.16
160	8	32.0	4.03	2.02	1.01	0.50	0.25	0.13
200	6.4	40.0	3.23	1.61	0.81	0.40	0.20	0.10
256	5	51.2	2.52	1.26	0.63	0.32	0.16	0.08
320	4	64.0	2.02	1.01	0.50	0.25	0.13	0.06
400	3.2	80.0	1.61	0.81	0.40	0.20	0.10	0.05
640	2	128.0	1.01	0.50	0.25	0.13	0.06	0.03
800	1.6	160.0	0.81	0.40	0.20	0.10	0.05	0.03
1280	1	256.0	0.50	0.25	0.13	0.06	0.03	0.02
1600	0.8	320.0	0.40	0.20	0.10	0.05	0.03	0.01
3200	0.4	640.0	0.20	0.10	0.05	0.03	0.01	0.01
6400	0.2	1,280.0	0.10	0.05	0.03	0.01	0.01	0.00

Version	Old Version 20	New Version Current
Changes made by	Greg Sleap	Greg Sleap
Saved on	Mar 14, 2025	Apr 09, 2025

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128T

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Content Comparison

Versions Compared

Key

Correlator

Correlator Modes

Data Rates at

128T

Data Rates at 152T

Data Rates at

184T

Data Rates at

200T

Data Rates at

256T