Tektronix WVR6020, Техническое описание

Страница: 128 / 138

Audio Performance Veri fi cation
1. Press the FACTORY button to restore the factory preset.
2. Press the CONFIG button to bring up the CONFIG menu.
3. In the Audio Inputs/Outputs submenu, select AES B and from the submenu
select Con
fi g Port as: Output.
4. Press CONFIG again to close the CONFIG menu.
5. Connect a 525/270 color bars signal from the DVG1 module to the SDI
A input of the instrument under test and terminate the SDI loop-through
connector.
6. Set the generator for embedded audio in 2 groups starting with group. Audio
settings in the TG2000 are accessed as follows:
a. Press Modules.
b. Select the appropriate module icon, HDVG1 or DVG1.
c. Press Test Signals.
d. Select Module Parameters.
e. Select Embedded Audio, and make sure Audio is on.
7. Check that "PPPP PPPP —- —-" is displayed in the bottom right area of the
status bar, indicating presence of two groups of embedded audio.
NOTE.
If status bar indicates that embedded audio is not present, set the number
of groups to 2 for the TG2000 module, even if appears to be set to 2 already.
8. Connect the AES B 1-2 I/O connector to the digital audio analyzer unbalanced
(UNBAL) input using a 75
Ω cable.
9. Set the audio analyzer for measurement of jitter per AES3-1992 (or 1997). To
con
fi gure the R&S UPL06 Opt B22, B29 for jitter measurement:
a. Press ANLR to display and con fi gure the analyzer screen.
b. Use the up/down arrow keys, keypad, and SELECT button to set the
parameters in the ANALYZER panel as follows:
Instrument Digital
Meas Mode JITTER/PHAS
Input
UNBAL (BNC)
Jitter Ref 48.0 (PLL)
START COND AUTO
Delay 0.0000s
INPUT/PHAS OFF
FREQ/PHAS OFF
114 Waveform Rasterizers Speci fi cations and Performance Veri fi cation