Tektronix VM700T
Video Measurement Set
Description
The VM700T is a total solution for your baseband video and audio monitoring and measurement needs. Features such as an extremely fast and fully automatic measurement mode as well as full manual operation provides the first-time user, as well as the seasoned professional, an unequaled value for their test and measurement investment.
The VM700T Auto mode makes standard video transmitter measurements quickly and automatically, including those specified in RS-250C/EIA-250C, NTC-7 and RS170A. Both vertical interval and full field measurements can be made and compared with user-defined limits. A dual limit verification system is employed to generate a caution or alarm message when either limit is violated. Reports can be generated and printed automatically at operator scheduled times or triggered from a conditional event.
Measure mode provides virtual real-time graphic displays of measurement results automatically. Vertical interval or full field measurements including noise spectrum, group delay, K-factor, differential gain and differential phase are presented as clever, easy to understand interactive digital displays. Such displays are indispensable when extremely fast measurement update rates (up to 30 times a second) are required to provide instant feedback of critical adjustments and analysis of signal variations. User-definable limits are visually integrated into graphic display and can be used to trigger a measurement report or a user-definable macro function. Such a function can, for example, dial out through a modem to report measurement results or control a signal router. A relative to reference mode allows normalizing to a signal source or eliminate signal path errors from the desired measurement. Up to two video references can be stored in NVRAM. Additionally, after downloading to a PC through the VM700T FTP driver, the video reference can be uploaded to another VM700T for reuse. A running average mode can be used to reduce the effect of noise. When additional measurement data is required, a user can custom configure measurement parameters and report format.
Key Points
Many Capabilities in One Instrument
Digital Waveform Monitor
Digital Vectorscope
Picture Display
Group Delay and Frequency Response
Noise Measurement Set
Automatic Measurement Set
Measure Mode Provides Graphic Display of Measurements
ICPM
K Factor
Differential Gain and Phase
Chrominance-to-Luminance Delay
Noise Spectrum
Group Delay with Sin x/x
Color Bars
Relative to Reference on Most Measurements
Configurable for All Standard Test Signals
Award-winning User Interface
Extremely Fast Update Rate
Parallel and Serial Printer Ports
Three Input Channels
Channel Difference Modes
External VGA Display Port
Fully Documented Remote Control Operation
Hardcopy for Analysis and Documentation
S-Video Capable
Specifications
VM700T Option 1S/2S
Input Specifications
Channel A
Physical: 2 BNC's
Input Impedance: 75 Ohms
Return Loss: >= 25dB from 1-360 MHz (power on)
>=15dB from 1-360 MHz (power off)
Channel B
Physical: 1 BNC (terminated)
Input Impedance: 75 Ohms
Return Loss: >= 25dB from 1-360 MHz (power on)
>=15dB from 1-360 MHz (power off)
Channels A and B
Format: 143 Mb, 270 Mb Serial Digital
Video per SMPTE 259.
Clock Tolerance: ±20 ppm.
Launch Amplitude: 800 mV ± 20% OR,
Cable Loss: 19 dB loss at 135 MHz wrt
800 mVp-p launch amplitude.
