Philips 6652C - Page 19

28 Set up a c ontrol panel configuration . Enter
some keyboard trigger levels with AUTO on -
it isn't necessary to have KEYBOARD on to do
this, but th e effect is sligh t ly diff e rent ,
as will be seen.
29 Decide if this is a set-up that is to be kept
more or less permanently, then press STORE .
30 The program cursor is indicating P1 . As a
sort of "common sense" operating procedure,
it is best to reserve P1 as "work area", in
which "temporary" panel layouts ar e stored so
that a line failure doesn't lose a complica-
ted
layout. Press STORE to store the configu-
rati on in P1, or, before pressing STORE:
31 Sele ct s ome other P number with the DOWN con-
trol, then press STORE. The stored panel pro-
gram for this panel confiqurat.ion is now Pn,
36 Because the potentiometer settings for trig-
ger level and HOLD OFF cannot be stored, and
if these are the controls sele c ted in a pro-
gram { AUTO and KEYBOARD off, HOLD OFF on),
then the microcomputer will accept the values
currently set on the potent iometers.
r-- HOLD OFF----.
51Js-1ms .,_
1ms .. 200ms ....._
ON
GJ
READ
GJ
MIN MAX
,----MEASURING TIME---,
DISPLAY TIME
OI
SPL MINIMUM/
HOLD SINGLE
0.1•
1•
Ell
10m s C) 10s
READ
&
[!]
1ms 96 s
I
0. 1ms l
where "n" is the program number chosen. 37 Select the program created earlier and then
32 Switch off then on, and find the program. It
isn't necessary to find it if it was still
active at power off - it comes back automati-
c ally. Check the controls and values stored.
33 Note that the trigger levels set in the pro-
gram via the key panel have not been s el ected
- AUTO has (check the trigger levels in use
with
READ. To use the keyboard tr i gger le-
vel s , KEYBOARD must be pressed to override
the AUTO levels . If KEYBOARD was wanted in
the program as the primary option , then the
KE YBOARD button should have been selected
when the program was created.
34 Note that though a HOLD OFF "OW' state can be
selec t ed and stored, the HOLD OFF time cannot
be
stored. Nor can the potentiometer t rigger
level values. Also note that MATH constants
cannot be stored in P7 and P8. Try it .
3S Now move the cursor out of the program indi-
ca t or s and select FREQ A with no program in-
dicator. Note that the controls and values of
the controls remain as they were set in t.he
last program selected. That is, the last
P-number at wh ich the cursor was stationar y.
If the cursor "scrolls" continuously through
P1 ••• PB, no program is selected. To get back
to the "initial" state, switch the power off,
then on.
note the measuring time. Switch the power
off, rotate the measuring t ime potentiomet er
as far as it will go in one direction, then
switch on again. Check the measuring time
with READ. It is that stored in the program,
not
that on the potentiometer . So if a new
program is created, that measuring time on
the display will be put i nto the new program.
38 Rotate the measuring time potentiometer. The
program measuring time is overridden, and any
new program created now will accept. the new
measuring time. The old measuring time is, of
course, still in the "old" program. Try this.
39 Make a program with the rear panel switch
ARMING / AVG / EXT GATE in any position but OFF.
The state of the switch will show on the dis-
play panel. Turn the power off and set the
rear panel switch to OFF . Power on and try to
store the program w it hout the switch func-
tion.
40 No matter how many times STORE is pressed,
the ARMED or AVG or EXT GATE function per-
sists in remaining in the program. To get :rid
of it, move the switch up and down , and then
Ie ·ave it OfT. This time, the indicator has
gone.
41 Now connect an input signal and start measu-
ring.
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