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Appendix A: Options
A–6
VITS100 NTSC VITS Inserter Instruction Manual
Option 2
VITS100 NTSC VITS Inserter Option 2 generates Cable Sweep and Cable
Multiburst signals to accommodate cable system measurements. These signals
replace the VIRS and Auto VIRS selections of the standard VITS inserter and
are selected with the same DIP switch settings (see Table A–4). See VITS
Selection, beginning on page 2–5, for more information about signal selection.
Table A–4: Option 2 DIP Switch Settings
Test Signal DIP Segment Settings
1 (5) 2 (6) 3 (7) 4 (8)
Cable Multiburst 1 0 1 1
Cable Sweep 0 0 1 1
Option 2 VITS inserters are configured during manufacture to insert these
signals; see Factory Configuration, on page A–8, for more information.
Characteristics of the Cable Sweep and Cable Multiburst are listed in Table A–5;
Figures A–5 and A–6 show the two waveforms.
Table A–5: Cable System Test Signal Characteristics
Name Description
Cable Multiburst See Figure A–5 for timing information.
White Reference Bar Amplitude 60 IRE
Packet Amplitudes 60 IRE
Pedestal Amplitudes 30 IRE
Burst Frequencies 500 kHz, 1.25 MHz, 2.0 MHz, 3.0 MHz,
3.75 MHz, 4.0 MHz
Packet Rise Time
500 kHz
Other Packets
140 ns typical (sin
2
shaped packets)
400 ns typical (sin
2
shaped packets)
Cable Sweep See Figure A–6 for timing information.
Pedestal Amplitude 50 IRE
Sweep
Amplitude 100 IRE
Frequencies
Start
Stop
0.1 MHz
4.2 MHz
Signal Characteristics