Atec Tektronix-VM6000 - Manual (Page 13)

Automated Video Measurement Set — VM6000
Option VGA – Analog RGBHV Measurement Interface Unit (MIU)
Video Measurement Accessories
For convenience and enhanced test performance, the VM6000 includes a
logical set of complementary video measurement accessories that simplify
connection, termination, and measurement. Custom-designed sync pick-off
and sync combiner accessories simplify measurement of TV signals. Option
VGA includes a custom measurement interface unit (MIU) that has been
engineered to enable precision, VESA compliant, and fully automated
measurement for 5-channel analog RGBHV signals. The MIU provides
termination, signal switching, and a current source/sink, eliminating the
need for expensive FET probes or manual switching of cables during
testing.
Addressing stringent requirements for measurement accuracy, the MIU
incorporates an innovative dual input path for RGB and HV channels in
order to deliver optimized accuracy for both DC amplitude measurement
and high-frequency timing measurements. Utilizing RS-232 control, the
VM6000 automatically selects either low frequency or wideband mode as
required by the parameter being measured. Incorporating a full 1 GHz of
bandwidth, with optimized return loss in wideband mode, the MIU delivers
unmatched speed, accuracy, and convenience in testing PC graphics
signals.
Sync Load Testing
Per VESA standards, H and V Sync voltages must be measured under V1
and V0 conditions with ±8 mA current loads to ensure adequate power is
Oscilloscope Measurement Menu
available to handle impedance variations that may occur with connected
displays. Option VGA automates this test by providing loads within the
remote control MIU.
Standard GPIB Remote Control and LAN
Connectivity
A fast and reliable GPIB port compliant to IEEE 488.2 is standard on
the instrument with selectable controller or talk/listener modes. A fully
documented oscilloscope GPIB remote command set and simplified video
command set enable all of the instrument capabilities accessible through
the user interface to be automated through GPIB remote control.
Network connectivity is provided with a LAN port supporting 10Base-T
and 100Base-T. This enables video test reports or data stored on the hard
drive to be accessed through the network. TekVISA™ is functional for LAN
remote control of the oscilloscope commands.
Complete Oscilloscope Functionality
Recognizing the need for flexibility, Tektronix has integrated the complete
DPO7104 functionality into the VM6000. Manual video measurements
are enabled with comprehensive analog HDTV/EDTV triggering for
emerging standards like 1080i, 1080p, 720p, and 480p as well as standard
video triggering on any line within a field, all lines, all fields, or odd or
even fields for NTSC, SECAM, and PAL video signals. In addition, IRE
and mV graticules can be selected for easier measurements and visual
inspection. Complete functionality of the DPO7104 oscilloscope and
optional application software packages extend the capabilities and value
of the VM6000 platform. Oscilloscope functionality and specifications are
detailed in the DPO7104 or appropriate application software data sheet(s).
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