Applications
NOTE
To examine a TV Line signal in more detail, set the
HORIZONTAL MODE switch to either ALT or MAG and
select either X5, X10, X50 magnification.
6
. To display a selected TV Line pulse, first trigger the sweep from
a TV Field sync pulse. If necessary, use HF REJ TRIGGER
COUPLING to improve the trigger. Switch HORIZONTAL
MODE to ALT and select X50 MAG to provide the normal dis
play together with the expanded trace. Select the desired line
pulse, using the HORIZONTAL COARSE and FINE POSITION
controls. Then switch MODE to MAG to eliminate the normal
(unmagnified) waveform.
Z-MODULATION
The Z-modulation system can be used to display time markers,
since it is entirely dependent upon the accuracy of the signal
source. It can also be used in any condition where external con
trol of the brightness of either the whole or part of the trace is
required.
The Z — or intensity— modulation feature is operated in the follow
ing manner:
1. Set the left TRIGGER SOURCE switch to EXT and the right
SOURCE switch to EXT Z.
2. Set the TRIGGER COUPLING switch to the desired setting.
This setting will couple both the Z-modulation signal and the
vertical triggering signal.
3. Apply a signal to either the C H 1 or the CH 2 connector and set
the VERTICAL MODE switch to display the channel used.
4. Apply the Z-modulation signal to the connector labeled EXT
INPUT OR Z.
When the Z-modulation and the vertical-input signals are
synchronized, Z-modulation is seen as gaps in the trace at the
modulation frequency. The size of the gap depends upon the
mark-to-space ratio of the Z-modulation signal. The positive
going portion of the Z-modulation signal decreases brightness.
3-16
2225 Operators
Содержание 2225
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Страница 58: ...Checks and Adjustments Figure 4 2 Locating the low frequency compensation adjustment 2225 Operators 4 3 ...
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