Tektronix WVR6020, Technical Reference

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Speci fi cations
Table 9: LTC display characteristics
Characteristic Performance requirement Reference information
LTC Waveform Displays voltage versus time waveform
of LTC input. Timing derived from currently selected
video timing.
AC coupled only. Graticule with volts and
audio dBu scale.
LTC Waveform Vertical Accuracy, typical ± 5%
LTC Waveform DC Offset, typical ± 100 mV
LTC Waveform Time Base, typical 3 ms/division for NTSC, 4ms/div for PAL. Runs in 2 fi eld sweep mode only,
triggered by fi eld one to allow verifying
audio to video synchronization.
Operating Input Voltage Range, typical 13.6 V
p-p
if driven differentially, 6.5 V
p-p
on
either input if driven single-ended.
AC coupled so always displayed
symmetrically about center. Waveform
will shift up or down if overdriven.
Maximum absolute input voltage range ± 12V on both inputs.
Table 10: External reference characteristics
Characteristic Performance requirement Reference information
Formats supported (See page 33, Signal Input-to-Reference
Compatibility Tables .)
In Ext Ref mode, waveform display and
line select function derive timing from the
Reference input. Reference must have
a frame rate compatible with the input
as listed in the
Signal Input-to-Reference
Compatibility Tables . Picture mode does not
use timing from the Reference input. With
Simultaneous inputs, External Reference
settings apply to both channels.
Input Dynamic Range, typical + 6 dB range
Absolute Maximum Input Voltage ± 8.5 V DC plus peak AC
Input Type Passive loop through 75 Ω compensated
DC Input Impedance 20 k Ω
Return Loss, typical Typically > 46 dB to 6 MHz with power on or
off. Typically > 40 dB to 30 MHz with power
on. Typically > 35 dB to 30 MHz with power
off.
Loop through terminated in 75
Ω , power on
or off.
Timing Shift with 10 to 90% APL
Change, typical
< 0.5 ns
Timing Shift with Hum, typical < 20 ns with 0 dB hum on WFM mode, 2
degrees on Vector mode.
Lock Range ± 50 ppm, remains locked.
Lock in Presence of Hum
6 Waveform Rasterizers Speci fi cations and Performance Veri fi cation