Display Of Trace Memory Contents - Philips PM3320 Operating Manual

4-124E
Vertical deflection
The contents of each trace register is 4096 10-bit digital codes, each capable of indicating one
out of 1024 different signal amplitudes.
These 10-bit digital codes can be inverted or expanded in the VERTICAL INVERT/ EXPAND
circuit and influenced by an additionai position information from the Y-POSITION contro! before
they are converted into the analog representation of the measured input signals by means ofa
VERTICAL DIGITAL TO ANALOG CONVERTER. From here the signal is applied to the VERTICAL
FINAL AMPLIFIER and the vertical deflection plates of the C.R.T. via a VERTICAL DOT
JOIN/SMOOTH filter.
|ADDRESS
ADORESS,
ADDRESS 3999) ADDRESS 3998]
14096 ACDRESSES OF TRACE MEMORY
Figure 4.56 Display of trace memory contents.
Display functions
With the pushbutton DISPLAY, a softkey menu is activated which makes selection of the
following functions possible:
~ Register selection
— POSITION selection: assignment of the frontpane! controls Y-POSITION, X-POSITION
and X-EXPAND to a selected register and channel.
Register INVERT
A versus B display
Reduced register text display
Full register text display
'
With pushbutton MAGNIFY, a softkey menu is activated for the following
functions:
- HORIZONTAL EXPAND *1..*64
~ VERTICAL EXPAND Y*5, Y*1 or Y/5