Performance veri
fi
cation
Master clock accuracy test
Perform this procedure to verify the accuracy of all video and audio related
clocks, including black burst subcarriers and SDI rates. The following equipment
is required for this test:
Frequency counter
Frequency standard
75
Ω
BNC cable (2 required)
75
Ω
feed-through terminator
1.
Use a 75
Ω
BNC cable and the 75
Ω
feed-through terminator to connect the
10 MHz / BLACK 3
connector to the INPUT A connector on the frequency
counter as shown in the following
fi
gure.
2.
Use an appropriate cable to connect the frequency standard to the external
reference input connector on the frequency counter.
Figure 2: Setup to verify clock accuracy
3.
Set the frequency counter to the external reference input.
4.
Set the frequency counter to the frequency measurement mode (if necessary),
and then set the Gate Time to 1 s.
5.
Set the reference source on the SPG8000 to Internal as follows:
a.
Press the
REF
button.
b.
Press the left (
◄
) arrow button until
Internal
appears in the menu, and
then press the
ENTER
button. The
INT
indicator below the Inputs button
panel should turn green.
SPG8000 Speci
fi
cations and Performance Veri
fi
cation
31
