Atec Tektronix-1730 Series - Manual (Page 7)

1730–Series Introduction
1–7
Table 1–2: DC Restoration
Characteristic Requirement Supplemental Information
Step
Number
DC restorer clamp time Back porch
Frequency response at 60 Hz Slow: 20% or less
Fast: 90% or greater Attenuation of 60 Hz on input signal 12
Blanking level shift with 10% to 90%
APL change APL changes from 50% to either 10%
or 90% will cause blanking level shift
of 1 IRE unit (7.14 mV) or less. 12
Blanking level shift due to presence or
absence of burst 1 IRE unit (7.14 mV) or less shift from
no color burst to presence of color
burst. 12
Table 1–3: Calibrator
Characteristic Requirement Supplemental Information
Step
Number
Frequency 100 kHz
±
100 Hz Synchronizes in 2H and 1H sweeps. Crystal controlled. Timing
accuracy is 10
µ
s,
±
0.01
µ
s. Can be used as 10
µ
s and 1
µ
s timing
calibrator.
3
Amplitude 140 IRE (1 V) within 1% 10
Position Top of waveform must be between 80 IRE (0.86 V) and 120 IRE
(1.14 V) on graticule when backporch is positioned to 0 IRE (0.300 V)
line, with DC RESTORER on.
Table 1–4: Horizontal Deflection System
Characteristic Requirement Supplemental Information
Step
Number
Sweep Sweep occurs in all horizontal mode
settings with or without synchroniza-
tion. 5
2FLD sweep repetition rate Equal to frame rate of applied video or
external sync
2FLD sweep magnification Approximately X25