4.11-2 Section 4: Using the Model 9500B — Composite Video Function
Final Width = 215mm
Descriptions assume 9500B/1100
Sequence of Operations
Refer to the table or list of UUT Oscilloscope
calibration points in the UUT Oscilloscope
Manufacturer's Calibration Guide.
Follow the sequence of calibration stages as
directed by the guide, and carry out the
following operations (1) to (6) at each stage.
1. 9500B
Use the front panel controls to set the 9500B to
output the required Luminance level,
Composite Video and line standard for the
UUT 'Scope cal point:
2. UUT 'Scope
a. Select the correct channel for the cal point.
b. Select the correct range for the cal point.
c. Select the correct presentation setup for
the cal point.
3. 9500B Set Output ON.
4. UUT 'Scope
Verify stable display from TV trigger in
accordance with the UUT Oscilloscope
Manufacturer's Calibration Guide.
6. 9500B Set Output OFF.
4.11.6.1 Introduction
As the 9500B composite video amplitude
variation is limited, and trigger outputs are not
variable, except as described in paras 4.11.5.1,
procedures for operating the 9500B are
essentially simple:
4.11.6.2 Interconnections
a. Use an active head to connect from the
required 9500B channel output to the video
input of the UUT Signal Channel to be
calibrated.
b. If a trigger is required, use an active head
(or trigger cable) to connect from the
required 9500B channel output to the input
of the UUT Trigger for the Channel to be
calibrated.
4.11.6.3 Calibration Procedure
The following procedure assumes that the
9500B instrument is in Manual Mode. It is also
assumed that the user will be familiar with the
methods of using front panel controls. In the
case of difficulty, re-read the paragraphs
earlier in this Section 4.
9500B and UUT Oscilloscope Setup
1. Preparation
Ensure that both instruments are powered ON
and warmed up.
2. UUT 'Scope
Select the required function for video and
trigger calibration.
3. 9500B
Ensure that the 9500B is in Composite Video
Function with Output OFF. If in any other
function, press the 'Aux' key on the right of the
'OSCILLOSCOPE CALIBRATOR' panel,
then the
soft key on the right of the
screen.
4.11.5.1 Value Editing
Amplitude
The three luminance levels give amplitudes as
follows:
White (1.0Vp-p),
Mid-grey (0.7Vp-p)
Black (0.3Vp-p).
Video Inversion
Composite Video can be toggled between
upright and inverse, using the +/- screen key.
No further adjustment is available.
Video Standards
Composite Video can be switched between
625 lines/50Hz and 525 lines/60Hz, using the
screen key.
Trigger Interval Selection
Either composite or frame synch can be selected
as trigger on the assigned trigger channel,
using the screen key. The +/- key
toggles the synch polarity as part of the
composite video.
4.11.5 Composite Video
Function Operation
625
50Hz
525
60Hz
TRIG
COMP
TRIG
FRAME
4.11.6 Using the 9500B Levelled Composite Video Function to
Calibrate Video Trigger Sensitivity of a UUT Oscilloscope
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