Philips 6652C - Page 23

PM 6654C programmable high resolution timer I counter 2ns Si ng le shot resolu tJOO
STARTISTOP
TOTALIZE
A
D
.
LOCAL/RESET
D
POWER
~ON
,-MATH--,
OISP=K· K+L
fF:1
b.J
.
D
L=
,----HOLD OFF--,
5u s .. 1r ns ..
1ms .. 2 00 ms ...._
ON
8
READ
r-EX P-., Ht
s
v
GATE
r-- MEASURING TIME---,
DISPLAY TIME
DISPL
HOLD
fF:1
lh:JJ
READ
MINIMUM/
SINGLE
10m~-
1
ffi 10s 0
V A
FRI O A
FAEQ C
PE RIOD A
RAT IO A /8
RA TI O C/ B
TIME A· &
P W I DTH A
PHASE A ~ B •
RI
S£/FAlL A
DU TY FACT A
T OT A/ I""\.8
TOTA / fl...lt8
TO TA l MAN
Vrnall \/ min
Vp p A
TEST
,-FUNCTION---,
•D•
•D•
STORE
• STBV
D
.
Gl
MIN MAX
1ms 9Gs I
0.1msL..-I ----'
G
SET VtA KEYBOAFIO
the function cu rsor takes the position of the
function specified in the program. Furt h er de-
pressions of the UP and DOWN controls will now
move the program ( P1 •• • P8) cursor, with the
function cursor respond to s uccessive programs.
If the "INPUT C" option is not installed in the
instrunent, the function cursor skips over any
fun c tion contai ning C reference. STORE is de-
scribed in "Stored Panel Programs" , and the in-
dividual functio ns are covered in "Practical
Measurements".
RF OPTION input C
Thi s is an optional input, allowing signals of
up to 1.5GHz to be measured.
KEYBOARD
The keyboard is used to enter nunerical values
(K and L constants and KEYBOARD trigger le-
vels ) . Expo nential v alues can be entered. Th e
ENTER LED lig ht s automatically after K=, L=, SET
A or SET B has been pressed. Th e LED begins
blinking as soon as any _ keyboard entry has been
made. If the ENTER LED is not either steady or
blink i ng, no keyboard entry can be made. The
ENTER "ON" state can be cancelled by pressing
RESET.
SLOPE
Selects the triggering slope.
DC / AC
Selection of DC or AC coupling of the signal
applied to input A and B respectively. Unless a
stored panel program has determined otherw ise,
AC coupling is automatically selected by the
microprocessor at switch on.
ATT x1/x10
When the LED is alight, the input signal is at-
tenuated by a factor of ten, and the trigge r le-
vels are multiplied by ten.
1MOhm/50 Ohm
Determines the input impedance of input A and
B.When the LED is lit, input impedance is
50 Ohm.
,.....,
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