Performance veri
fi
cation
3.
Use a third 75
Ω
BNC cable to connect the
SDI A
connector on the reference
unit to one of the SDI inputs on the waveform monitor.
4.
Use a fourth 75
Ω
BNC cable to connect the
BLACK 1
connector on the
SPG8000 under test to the REF IN connector of the waveform monitor. Make
sure to terminate the reference loopthrough on the waveform monitor.
5.
Press the composite input and the EXT REF buttons on the front panel of the
waveform monitor to display the composite input relative to the reference
signal.
6.
Set the waveform monitor to 4-tile display mode and select the following
displays: WFM, Vector, Timing (press the MEAS button), and Video Session
(press the STATUS button).
NOTE.
In the timing display, make sure the "relative to" window indicates "Analog
DAC". If it does not, press and hold the MEAS button and correct it.
7.
Load the factory default preset for both the reference unit and the SPG8000
under test. (See page 20,
8.
Set the reference unit source to Internal as follows:
a.
Press the
MODULE
button until you see GPS7 in the menu.
b.
Press the down (
▼
) arrow button until
REFERENCE
appears in the
menu, and then press the
ENTER
button.
c.
Press the left (
◄
) arrow button until
Internal
appears in the menu as the
source, and then press the
ENTER
button.
d.
Press the
BACK
button to exit the menu.
9.
Do the following steps to check that the BLACK 1 output of the reference
unit is set to NTSC Black Burst. (This should have been done automatically
when the instrument was reset to factory default.)
a.
Press the down (
▼
) arrow button until
SELECT OUTPUT
appears in
the menu.
b.
Press the left (
◄
) or right (
►
) arrow until
BLACK 1
appears in the menu,
and press the
ENTER
button.
c.
You should see
SELECT FORMAT
in the menu. If you do not, press the
down (
▼
) arrow button until it appears.
d.
You should see
NTSC
on the menu.
If you do, the output is set correctly. Press the
BACK
button and proceed
to step 10.
If you do not, press the left (
◄
) or right (
►
) arrow button until
NTSC
appears, press the
ENTER
button. and then proceed to step e.
SPG8000 Speci
fi
cations and Performance Veri
fi
cation
33