Glossary
xi
Scanning
When a facsimile broadcasting is received and recorded, the recording of the
received image starts one dot by one dot from the left end of the paper.
When the recording reaches the right end, it is returned to the left end of the
paper again and the same operation is repeated until the image recording is
completed. This operation is called “scanning”.
Primary scanning
Scanning in the horizontal direction as shown above
Secondary scanning
Scanning in the vertical direction as shown above
Scan line density
The number of scan lines plotted while the paper moves one millimeter in the
secondary scanning direction during the recording of received signals.
Scan speed
Primary scanning speed: for example, 120 primary scannings per minute are
performed at 120 spm (scan per minute).
Index of cooperation
(IOC)
If the paper size transmitted from a broadcasting station is different from the
recording paper size on the receiving side, it is necessary to equal the vertical
and horizontal reduction or enlargement of the original paper to keep a similar
figure. The coefficient to keep a similar figure between transmitting and
receiving sides is called “index of cooperation”.
Halftone recording
This is a method of displaying the contrast of clouds in recording cloud photos
taken by a meteorological satellite, in which the contrast is displayed by the
difference in the density of black dots like in a black/white photo in a
newspaper. It is indicated as HALF in this manual.
Start signal
Start signal is the signal transmitted at the beginning of the facsimile
broadcasting to indicate the start of the broadcast.
JAX-9B uses it for the automatic setting of the index of cooperation (IOC) and
starts the automatic recording by receiving this signal.
Summary of Contents for JAX-9B
Page 2: ......
Page 9: ...Equipment Appearance vii JAX 9B Weather Facsimile Receiver External Appearance...
Page 19: ...Chapter 1 General Outline of Equipment 5 1 5 System Diagram 220Vac...
Page 20: ...Chapter 1 General outline of Equipment 6...
Page 92: ...Chapter 5 Maintenance 78...
Page 98: ...Chapter 8 Operating Environment 84...
Page 100: ...Chapter 8 Operating Environment 86...
Page 103: ...Chapter 10 Disposal 89...
Page 107: ...Appendix 93 Appendix figure 2 JQD 69C Junction Box 110 1 160...
Page 108: ...Appendix 94 Appendix figure 3 NBA 5143 Rectifier Unit 120 2 170 2 130 1 MAX 20 20 20...
Page 110: ...Appendix 96 Appendix Figure 4 Interfered reception example 1...
Page 111: ...Appendix 97 Appendix Figure 5 Interfered reception example 2...
Page 112: ...Appendix 98 Appendix Figure 6 Interfered reception example Multi path echo...
Page 113: ...Appendix 99 Appendix Figure 7 Interfered reception example Fading...
Page 114: ...Appendix 100 Appendix Figure 8 Interfered reception example Different reception frequencies...
Page 117: ......