Performance veri
fi
cation
SDI output amplitude
Perform this test with the instrument in factory mode. (See page 19,
Perform this test after you have performed the
Amplitude characterization
procedure
CAUTION.
The serial output level can be adjusted when the instrument is in
factory mode. Be careful not to accidentally adjust this level, as this will invalidate
the factory calibration. If you need to perform a serial output level adjustment,
see the SPG8000 service manual for the procedure.
1.
Connect a 75
Ω
cable from the
SDI 1B
output on the SPG8000 through the
BNC to SMA adapter (with or without the 6 dB pad) to the trigger direct input
on a sampling oscilloscope.
2.
Connect a 1 m high-bandwidth cable from the
SDI 1A
output of the SPG8000
to the TCA75 BNC on the oscilloscope adapter.
Figure 29: Setup for SDI output amplitude test
3.
Set the SDI calibration signal for
SDI 1A
to 20 bits square on the SPG8000 as
follows:
a.
Press the
SDI
button on the SPG8000.
b.
Use the up (
▲
) arrow button to select
CALIBRATION
. You should see
Channel 1 : Top
in the menu.
c.
Press the
ENTER
button.
d.
Press the right (
►
) arrow button to select
20 bits Square
.
SPG8000 Speci
fi
cations and Performance Veri
fi
cation
101
