Tektronix VM700T User Manual page 13

Preface
Option 42
viii
These options also enable the VM700T to continuously monitor audio test lines
for the presence of a test sequence designed for automated testing (the TEK
sequence). The audio option tests to ANSI standard T1.502-1988, EIA/
TIA-250-C, or CCITT Recommendation O.33.
The audio measurements results obtained using automatic monitoring can be
included in the VM700T Auto Mode video measurements display, with the time
and date of the last sequence received. Timed reports and the logging of results
can be performed automatically. Also, a file in the VM700T Measurement
Results directory is updated each time an audio auto test sequence is received
and measured.
Option 40 has two stereo input channels with mini-XLR input connectors.
Option 41 provides for three stereo input channels connected through a male DB
37 connector. A female DB 37 connector is provided with Option 41 to use for
fabricating the interconnecting cable that applies the signals to be measured to
the triple input of the VM700T. Either Option 40 or Option 41 may be installed
in the VM700T, not both.
The Audio/Video Timing measurement option (Option 42) of the VM700T is
part of a system that measures the timing difference between audio and video
portions of a program that arrive from different transmission paths. This feature
is used in conjunction with the VITS 200 NTSC VITS Inserter or VITS 201 PAL
Insertion Generator and the ASG100 or ASG140 Audio Signal Generators that
are also equipped with the Audio/Video Timing measurement.
VM700T Option 40/41/42 Audio Measurements User Manual