Use Of Internal Registers - Philips PM3320 Operating Manual

4-94
4.3.3 Use of internal registers
The procedure'to save information in the internal registers or to clear the contents of these
registers is now described.
Four interna! registers RO, R1, R2 and R3 areavailable and in each of these registers a signal from
channel A as well as a signa! irom channel B can be stored.
New signal information will always be stored in register RO and the contents of this register can
later be saved, if required, in one or more of the other three registers R1, R2 and/or R3 using the
SAVE/PLOT menu by pressing the SAVE/PLOT pushbutton.
Using the DISPLAY menu by pressing pushbutton DISPLAY, gives the facility to the user to select
one or more of the four internal registers to display their contents on the CRT screen.
Then displayed signals are overlapping each other on the screen.
To avoid this, the MAGNIFY menu can be selected by pressing pushbutton MAGNIFY to select
the Y/5 magnify mode which results in the following display of four registers.
100 |-++
90
--++-- 10
0%
OU OOO
Ty
Figure 4.43 Display of four registers in Y/5 mode.
The memory system can be locked by depressing pushbutton LOCK and from that moment on no
new signal acquisition can take place.
By depressing pushbutton WRITE, the system can be enabled again for new signal acquisition.
Register RO can be cleared (in WRITE-mode only) using the CLEAR pushbutton,
The other registers can be cleared then by saving the cieared contents of register RO in the
selected register. In other words, clearing a register R1, R2 or R3 can be done by saving the blank
contents of register RO in the selected register. '