Fluke 9500B - Page 73

Section 4: Using the Model 9500B — Edge Function 4.7-3
Final Width = 215mm
Descriptions assume 9500B/1100
500ps Edge and Fast Edge
From the default '0.2V/div', the value can be
raised using the


key up through 0.5V/div
and so on to 1V/div, providing that the other
contributors will not take the output voltage
value above 3.00Vp-p.
Similarly, the


key
will reduce the Units/Division down through
0.1V/div and so on to 1mV/div, unless the
output voltage would fall below 4.44mVp-p
(all frequencies).
High Edge
For High Edge the default is '1V/div', the upper
limit is 2V/div (O/P Ampl. limit for 1M
Ω
load
5.56Vp-p). The lower limit is 0.2V/div to
1mV/div,
(O/P Ampl. limit 888mVp-p) .
Multiplier (Scope Mode)
500ps Edge, Fast Edge and High Edge
Again the

and

keys are inactive.
From the default 'x 5', the value can be changed
using the


and


keys, by single integer
increments to values between 1 and 10, within
output voltage value limits. The product of the
units/division and multiplier are shown on the
right side of the '=' sign.
Deviation (Scope and Direct Mode)
The triangular type of cursor indicates that all
the cursor keys can be used as in other functions.
From the default 00.00%, the deviation
percentage can be changed to any value within
its resolution between -11.20% and +11.20%,
within output voltage value limits. The result
of combining the units/division, multiplier and
deviation are shown as the p-p value of 'O/P
Amplitude'.
Output Voltage (Scope and Direct Mode)
The O/P Amplitude is only adjustable by means
of its contributors.
500ps Edge and Fast Edge
From the default 1.0000V p-p, the output
voltage can be changed to any value within its
resolution between
4.44mVp-p and 3.0000Vp-p .
The software ensures that the contributors'
values remain within their limits.
High Edge
From the default 5.0000V p-p, the output
voltage can be changed to any value within its
resolution between 888mVp-p and 5.56Vp-p
(1MΩ expected load only). The software
ensures that the contributors' values remain
within their limits.
Frequency (Scope and Direct Mode)
500ps Edge and Fast Edge
From the default 1MHz, the output frequency
can be changed to any value within its resolution
between 10Hz and 2MHz.
High Edge
From the default 1kHz, the output frequency
can be changed to any value within its resolution
between 10Hz and 100kHz.
Rise (Fall) Time (Scope and Direct Mode)
When each head is calibrated, its measured
(10% to 90%) transition times for each type of
edge are stored in non-volatile memory. During
normal use, this figure is recalled and presented
on the 'Rise Time' field for the selected head
(channel) and selected type of edge.
4.7.4.3 Low Voltage (LV) and
High Voltage (HV) States
Entering and leaving High Voltage state in
High Edge Function is governed by the same
rules as for Square function (refer to para
4.5.5.3). The threshold-setting limits are
±10Vpk-pk and ±110Vpk-pk.
4.7.5.1 Introduction
Active heads are introduced briefly in paras
4.2.2 (Interconnections).
The front panel operations of Signal Channel
selection, Trigger Channel selection, Cable
selection and Trigger Ratio are described earlier
in paras 4.5.3 (DC/Square function).
4.7.5 Using Active Heads