LSS−100P Installation & Operation Manual
v160817
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6.
The luminance and color (x, y) should agree with an accurate color meter. Spectrometer-based
color meters are the most accurate for xenon-based projectors (see
http://ftp.uslinc.com/?dir=ftp/Products/LSS-100P/Documents/Technical/ColorMeasurement
for
more information on the LSS-100P color measurement). Note that luminance varies with
measurement position due to the incident angle of the projector light with the screen and
screen gain.
7.
Turn on a pink noise source on one of the auditorium speakers (or play the test DCP which
contains pink noise on each speaker in sequence). The SPL indicated by the LSS-100P should be
close to that measured with an SPL meter. Again, due to system tolerances and variations in
sound level throughout the auditorium, the numbers will not match precisely.
NTP, IR, and Luminance Check
1.
Go back to the NTP configuration page (shown in figure 8) and ensure that the LSS-100P has
received an NTP update.
2.
If desired, the LSS-100P luminance measurement can be scaled to agree with a reference meter.
The LSS-100P is factory calibrated, but, because it is not in the same location as a reference
meter in the auditorium, it will probably read slightly different from the reference meter due to
screen gain, elevation of the projector above the screen center, etc. Project the test pattern
(ideally from the LST-100) and measure the luminance with the reference meter. While the test
pattern is still present, key the measured luminance value into the appropriate box (cd/m
2
or fL)
in the Luminance Scaling section of the Auditorium Data page (see figure 6). Click the “Save
Settings” button to scale the LSS-100P luminance measurement to match the reference meter.
You can click the “Reset Luminance Scaling” button to return the LSS-100P to factory calibration.
3.
IR Calibrate also appears on the Auditorium Data page (board revision F and higher). Press the
“Set IR Reference” button when typical IR illumination of the screen is present. When the LST-
100 test content plays, a USL UPC-28C emitter transmits the hearing impaired and closed
caption carriers, but not the visually impaired carrier. If you click the “Set IR Reference” button
when the LST-100 content is playing, the LSS-100P will set this level to 100%. The LSS-100P will
read about 75% if only one IR carrier is present. It will read about 117% if all 3 carriers are
present.
Writing Command Scripts
The LSS-100P script definition page includes default scripts. These can be copy and pasted into the script
definition window. This section covers running the test DCP and configuring limits on the scripts.
1.
Download the LSS-100P test content from
http://ftp.uslinc.com/?dir=ftp/Products/LSS-
100P/Software/TestContent
. The README.txt file describes the test content and provides
sample scripts.
2.
There are three ways that a Command Script may be triggered. The recommended method is to
use the red/green script trigger clips located that is included in the content downloaded in step
1. Create a show playlist with an LST-START clip followed by the desired test content (such 5.1 3-
band). Note that we have found that the red/green script trigger clips may not work with some
laser projectors. If this is the case with your projector, use one of the other methods of starting
a script as defined in Appendix A – Red/Green Flash Script Start.
