Operator`s manual

Viewing Waveforms, Vectors, and Pictures
7-10
Using Filters
Filters let you view only a luminance display or a chrominance display. You can parade these
waveform displays with the normal or flat waveform to view a signal in three ways at the same time.
Paraded filters can also be separated vertically.
NOTE:
The luminance display is also available for component signals.
To view the effects of a filter on a composite waveform:
1. Press the Filter button. After one push, the Luma LED comes on, and you see only the
waveform’s luminance frequencies. Everything above the chroma burst frequency is suppressed
(see Figure 7-10).
2. Press the Filter button a second time. After two pushes, the Chroma LED comes on and
everything below the burst frequency is suppressed (see Figure 7-11).
3. Press the Filter button a third time. After three pushes, a parade of three views of the same signal
appears: flat or no filter, luminance filter, and chrominance filter. In this mode and with the Parade
LED on, you can move the three views separately (see Figure 7-12).
Note that the three LEDs next to the Position button are lit (Wfm Pos button for the AVM-510A).
Moving the V Pos knob now moves all three parts together.
Successively pressing the Position button cycles through individual control of the three parts and
then back to vertical control of all three together. Pressing the Filter button brings you back to the flat
view alone.
In 2F sweep mode, you can use the Luma and Chroma filters, but you cannot parade them. If the B:
input has a component signal, you can use the Luma filter on it, and will only apply to all three
components. If you view the A: and B: inputs together, the Luma filter is the only one available, and it
applies to both signals at the same time.
NOTE:
The normal waveform display is actually filtered in the no filter or flat mode to
begin rolling off at 8 MHz. If you want to measure a waveform flat to 10 MHz, change to
vector with waveform by pressing the Vector button twice.
Figure 7-10. Luma Filter on Bars