Maintenance
MT930B
Service Manual
Page 6-17
VIDEO AUTOMATIC MEASUREMENTS
Measurement Conditions 525 (NTSC):
•
Frequency: 1210 MHz at –30 dBm
•
Pre-emphasis: 525
•
Video modulation: 18.4 MHz p-p
•
Receive frequency: 1210 MHz
•
METER SELECT: TUNE
•
IF BANDWIDTH: 36
•
AFC: ON
•
AGC: ON
•
VIDEO: 525
•
VIDEO BANDWIDTH: 4.2
•
DE-EMPH: ON
•
RF INPUT: 1
•
VIDEO INVERSION: Ku, NOR
•
LNB POWER: OFF
•
VIDEO: COMPOSITE OUT
•
VIDEO SIGNAL OUTPUT: COMPOSITE OUT
•
VIDEO OUT: #1
Measurement Conditions 625 (PAL):
•
As for 525 (NTSC), but change the following:
•
Pre-emphasis: 625
•
Video modulation: 24.0 MHz p-p
•
VIDEO switch: 625
•
VIDEO BANDWIDTH switch: 5.5
Measurement Procedure (Automatic):
Make the following measurements with the VM-700 in AUTO mode:
•
Line-Time
Distortion
•
Short-Time Distortion (NTSC)
•
Pulse/Bar Ratio (PAL)
•
Video S/N (C/N > 25 dB)
•
Luminance
Nonlinearity
•
Chrominance–Luminance
Intermodulation
•
Field-Time
Distortion
Summary of Contents for mt930b
Page 3: ...MT930B Service Manual Page i ...
Page 10: ...General Information Page 1 4 Service Manual MT930B THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 22: ...Controls and Connections Page 3 4 Service Manual MT930B THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 86: ...Options Maintenance Page 7 2 Service Manual MT930B THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 90: ...Drawings Page 9 2 Service Manual MT930B 10264 Figure 9 1 MT930B Block Diagram 1 ...
Page 91: ...Drawings MT930B Service Manual Page 9 3 10265 Figure 9 2 MT930B Block Diagram 2 ...
Page 92: ...Drawings Page 9 4 Service Manual MT930B 10266 Figure 9 3 MT930B Block Diagram 3 ...
Page 93: ...Drawings MT930B Service Manual Page 9 5 10267 Figure 9 4 MT930B Block Diagram 4 ...
Page 94: ...Drawings Page 9 6 Service Manual MT930B 10268 Figure 9 5 MT930B Head Phone Schematic ...
Page 95: ...Drawings MT930B Service Manual Page 9 7 10269 Figure 9 6 MT930B RF PC Board Schematic ...
Page 96: ...Drawings Page 9 8 Service Manual MT930B 10270 Figure 9 7 MT930B Converter Module Schematic ...
Page 97: ...Drawings MT930B Service Manual Page 9 9 10271 Figure 9 8 MT930B Main PC Board Sheet 1 of 3 ...
Page 98: ...Drawings Page 9 10 Service Manual MT930B Figure 9 9 MT930B Main PC Board Sheet 2 of 3 ...
Page 99: ...Drawings MT930B Service Manual Page 9 11 10273 Figure 9 10 MT930B Main PC Board Sheet 3 of 3 ...
Page 100: ...Drawings Page 9 12 Service Manual MT930B 10274 Figure 9 11 MT930B Power Supply Schematic ...
Page 101: ...Drawings MT930B Service Manual Page 9 13 10275 Figure 9 12 MT930B IF Filter Block Schematic ...
Page 102: ...Drawings Page9 14 Service Manual MT930B 10276 Figure 9 13 MT930B Audio IF PB01 Schematic ...
Page 103: ...Drawings MT930B Service Manual Page 9 15 10277 Figure 9 14 MT930B Audio Out Schematic ...