LeCroy 9450 - Page 30

27
-Apr-89
15:31:30
CALIBRATION
ERROR
LOG
LgCrgy
Vertical Calibration
Chan
1+2
4 nibbles=CBWL 0FF.50Q)
(0FF.1MQ) C0N.50Q) C0N.1MQ)
Calib
Const
(8=0ffset Range,
4=0ffset Conv,
2=Gain
Range,
l=Gain Conv)
Chan
1+2
Full Test
Full Re-
callbration
Calibration
Error Log
More Consts
Return
5
mV
10
mV
20
mV
50
mV
.1
V
.2
V
.5
V
1
V
TMS
Status
CHAN1
0
0
0
0
0
0
0
0
Working
CHAN2
0
0
0
0
0
0
0
0
Working
4 nibbles
=
Trigger Cal.
Leveling
Cal.
Phase
Cal.
TDC
Calibration
C400Ms) C200MS) ClOOMs)
0
0 (2=No BWL,
0
0
C2=0f
Pset
,
0 0
C4*Limits,
0
(40Ms)
1=BWL)
l=Gain Conv.)
2=Fit, l=Conv)
Figure Is
Calibration
Error
Log
Vertical
Calibration:
BWL
ON/OFF and
50/1M
input
coupling
makes 4 acquisition
conditions
per
channel. The error
status of
each is
represented
by
a
nibble
as
explained on the
display.
The
4 error
bits have the following
meaning:
l=gain convergence:
One or
more of
the 8 nominal DAC
calibration
points
cannot
be reached.
2=gain range:
A
multiplicative
calibration
parameter becomes
too
small
(dgain <
0.95)
such that there
may not
be sufficient
variable gain.
4=offset
convergence: One
or
more of the nominal
points
to
calibrate
the
offset DAC cannot
be reached.
5