Tektronix VM700A User Manual

Section 3 - Configuring the VM700A
3-10
VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual
After the new time and date have been loaded, press the Configure button to exit
the Time display and return to the mode previously in effect. Press Configure
again to return to the top Configure display.
Directory Structure
VM700A operations are controlled by means of a hierarchy of files and
directories that starts with the Video Source file in the /nvram0/ConfigFiles
directory, and extends to other files in sub-directories of /nvram0/ConfigFiles.
You can customize the operation of the VM700A to suit your specific measure-
ment requirements, and switch quickly between VM700A setups as needed to
perform different operations by varying the contents of these files and sub-
directories.
All ConfigFiles sub-directories except Measurement Results contain a file named
System Defaults. System Defaults files are used as templates to create new files
in a directory. (For more information about creating customized files for a
directory, see the discussion of “Configure Operations,” earlier in this section.)
The following pages describe the /nvram0/ConfigFiles hierarchy and how it
controls VM700A operation. The Source_Selection~Video file and the
Video_Source~Files subdirectory are discussed first. This is followed by a
description of the contents and function of the other files and sub-directories in
/nvram0/ConfigFiles.
The Source_Selection~Video file assigns a file in the Video_Source Files
directory to each of the VM700A signal sources (A, B, and C). When a given
source is selected (that is when its front-panel Source button is on), the VM700A
gets parameter information from the file in the Video_Source Files directory
pointed to by the corresponding entry in the Source_Selection~Video file.
Figure 3-4 illustrates the relationship between the current signal source (as
indicated on the VM700A front panel), the Source_Selection~Video file, and the
contents of the Video_Source~Files directory.
The following text is an example of a typical Source_Selection~Video file:
Station XYZ’s video source file
Channel A Video Source: tx1
Channel B Video Source: tx2
Channel C Video Source: studio1
Timed Events: My_Events
With the text of the example Source_Selection~Video file, the VM700A reads
the file named “tx1” in the Video_Source~Files directory for parameter
information when Channel A is selected, the file “tx2” when Channel B is
selected, and the file “studio1” when Channel C is selected. The occurrence of
Source_Selection~Video
(File)

Tektronix VM700A Specifications

General

Brand	Tektronix
Model	VM700A
Category	Measuring Instruments
Language	English