Magni MM-410, Operator'S Manual, Page: 109 / 182

Automatic Measurement (AVM-510A)
9-3
Test Signal Measurement Sets
Three basic composite test signal measurement sets are available with the AVM-510A. Two of the
measurement sets are associated with common test signals, such as color bars and multiburst signals.
The third measurement set is for live video. The test signal measurement sets can be applied to several
test signals, for example, 75% or 100% color bars. You can let the AVM-510A sample a test signal and
automatically apply a measurement set, or you can force the AVM-510A to apply a measurement set
and then force it to accept one of the test signals. The System Video measurement set is designed to
measure live video signals.
The Color Bars set is associated with 75% full field color bars, 100% color bars, and (in NTSC)
SMPTE bars. The Frequency Response measurement set is associated with various multiburst signals.
NOTE:
The AVM-510A does not support any measurement sets for component signals.
The following table lists the types of measurement sets and the test signals normally used.
Measurement Set Test Signals
Type 525 Systems 625 Systems
System video Live program video Live program video
Color measure 75% color bars
100% color bars
75% SMPTE bars 75% color bars
100% color bars
Frequency response FCC multiburst
Custom mulitburst CCIR 18
Custom mulitburst
Non-linear measure FCC composite
NTC7 composite CCIR 17/330
National ITS
Transmitter (AVM-510A-T) FCC composite
NTC7 composite CCIR 17/330
National ITS
Some measurement set parameters (measured parts of the signal) are common to all measurement
sets, such as Sync Ampl and Burst Ampl. Other measurement set parameters are specific to one
measurement set. For example, APL is a parameter only measured in the System Video set. Each
measurement set has a specific line on which it will make the measurements. You select this line. You
can also select a different line for each measurement set. The following choices affect the way
automeasurement operates:
•
Automeasurement Set

This menu selection called AUTOMEASURE/AUTO MEAS SET
enables the AVM-510A to sample an incoming signal on the designated line, determine what test
signal is available, and then apply the appropriate measurement set, either Color Setup or
Frequency Response.
NOTE:
System Video is never applied when AUTOMEASURE/AUTO MEAS SET is
selected.
•
Selecting a Specific Measurement Set

Selecting a specific measurement set lets you use this
measurement set but still allows the AVM-510A to automatically determine the test signal. For
example, you can select Color Setup even if the signal is multiburst. You can also use System
Video parameters, however, you must specifically select that set.
•
Forcing a Test Signal

Forces the AVM-510A to apply a specific chosen measurement set to
the signal. In this case, the AVM-510A assumes that the test signal is the one you selected. You
might make this selection if the signal is weak or noisy so the AVM-510A can detect the signal.