The Show Text Display; Figure 2-9: The View Audio Auto Test Menu Tree - Tektronix VM700T User Manual

The Show Text Display

VM700T Option 40/41/42 Audio Measurements User Manual
The menu tree for the View Audio Auto Test measurement functions is shown in
Figure 2–9. A short description of each choice is given on page 2–20.
View Audio
Autotest
Show Graph
Text Levels
View
View
Right
Left
THD at
TEST Level
Figure 2–9: The View Audio Auto Test menu tree
The Show Text display of the View Audio Auto Test shows the results of the
current test. Figure 2–10 shows the View Audio Auto Test screen display for
Tektronix Program 93 received from a Tektronix ASG100 or ASG140 Audio
Signal Generator. The display is different for each Auto Test as different
measurements are made.
The numbers shown include the test program number and source (test type and
source name are decoded from the preamble of the audio test signal), measure-
ment date and time, and measurement status. The measurement status shows one
of three types of messages: "No Test Received," "OK," or an error message. If
the measurement status is OK, the display shows the test sequence (Tek or O.33
Recommendation) sent, the program number of the test, and a test-source
identifier.
The expected test levels for O.33 Recommendation test sequences are set at
configuration (these should match the test levels sent by the signal generator).
For Tek test sequences, however, the Audio Option ignores the audio levels set at
configuration. Instead, the Audio Option gets its expected test level information
from the preamble of the received test sequence.
NOTE. The Audio option normally receives the test sequence preamble on the left
channel. If left and right channel inputs are reversed, the Audio option views the
test and indicates the signal reversal by displaying "Swapped" rather than
"Normal" Stereo Channel Assignment.
Graph Graph
Phase THD
Rescale
View
Rescale
Diff
THD at THD at
TEST + 10 dB
TEST + 15 dB
Operating Basics
Graph
Crosstalk
View View
R " L L " R
View View
Rescale
Left Right
Rescale
2–15