Philips 6652C - Page 45

Measuring Vmax• Vmin• Vpp on channel B
Channel B voltage measurements are only accessi-
ble via the bus, and not via the front panel in
local (manual) mode.
The used mnemonics are:
F14QB1 for turning on Vmax• Vmin B.
f15QB1 for turning on Vpp B.
QBkl for turning off Vmax• Vmin or Vpp B.
The voltage 8 - function is an odd feature with
some exceptions to "normal " condition.
QB1./QB0 are never shown in the program data
out string. I.e. the controller will never
know if channel A or B is selected in volt
measurements.
-
QB1/QB0 cannot be stored in the front panel
menus P1 ••• P8.
QB1 should be sent after the specified func-
tion (F14 or F15). I.e. F14QB1 is ok, but
QB1F14 is not.
- Always turn off the selection of volt B by
QB0 when the measurement is finished.
Device clear
Sending the string "0" will program the counter
to default settings which are:
frequency A, No external control, Min/single
off, Measuring time = 100 ms, Math off, Trigger
level Auto, Set keyboard trigger levels A = B =
0 V, Coupling A = AC, Coupling B = DC, Attenua-
tion (A and B) = x1, Trigger slope (A and B) =
positive, Termination (A and B) : 1 Mohm, COM
via A off, Stop manual gating (TOT A only), Dump
mode off, service request disable, hold-off off,
check off, triggered mode off and default deli-
miter setting. See "Delimiter settings".
Sending a single: "D" will thus result in the
same counter performance as:
"F1G.0SSa-SM1E-1 SK1 SU1ME0TL2ALfi!BUlAC1 BC0
AA0BAfi!AS0BSfi!AT0BT.0CE~TOfi!HSfi!SQfi!HEfi!CHfi!TE.0"
Sending a "D" is the same as sending bus com-
mands DCL (device clear) or SOC (selective de-
vice clear).
Program data out
When Pfil or P1 (program data out) is sent, the
next output from the counter will not be measu-
ring data but 8 strings (Pfil) or 1 string (P1)
containing the settings of the counter. The
string(s) can be sent back to the counter for
later programming. In this way it is possible to
perform remote programming of the counter by
copying the local settings (BUS LEARN). The pro-
cedure is:
a) Set the counter as desired in local mode.
b) Output a
"Pl'l" or "P1" to the counter.
c) Enter the string from the counter (for later
use).
Sending a "P1" results in an unreadable 43
character string which should only be used for
reprogramming the counter.
Sending a "Pfl" returns the programming data of
the counter in a readable form, suitable for
display on a controller screen or for direct
printout. The data is sent as 8 strings each
terminated by the selected delimiter.
The format is shown in the table below. The fol-
lowing abbreviations are used:
± means + or - sign
v means either a or 1.
w means digit 0 •.• 2
x means
digit 0 ••• 3
y means digit 0 ... 6
z means
digit _0 ••• 9
FzzSMzz.E±zSSv
ACvASvAAvATvAL±z.zz
BCvBSvBAvBTvBL±z.zz
TLwTOvCEvCHvTEv
SQxHSvLEvMSvSDx
GyHEwMEvRMvRHvRLv
SK+zzzzzzzzz.E±zz
SL+zzzzzzzzz.E±zz
NOTE: The decimal point, where present, is
fixed. A K value of 60 will be sent as:
"SK+000000060. E+OD", whereas a L-value of
3750.65 is sent as:"SL+000375065.E-02".
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