Atec Tektronix-1730 Series - Manual (Page 5)

1730–Series Introduction
1–5
Table 1–1: Vertical Deflection System
Characteristic Requirement Supplemental Information
Step
Number
Frequency response
Flat
Low-pass filter
Chroma filter
Flat: 50 kHz to 6 MHz within 2% of
response at 50 kHz.
Flat (X5): 50 kHz to 6 MHz within 5%
of response at 50 kHz.
1730: At least 30 dB attenuation at
3.58 MHz
1735: 4.00 MHz
1731: 4.43 MHz
NTSC and PAL-M: Nominal bandwidth
1 MHz. Attenuation at 7.2 MHz 20 dB
or greater. Response at 3.58 MHz
does not vary between FLAT and
CHROMA by more than 1%.
PAL: Nominal bandwidth 1 MHz.
Attenuation at 8.9 MHz 20 dB or
greater. Response at 4.43 MHz does
not vary between FLAT and CHROMA
by more than 1%.
Specifications apply for full screen
height video input signal, with variable
GAIN off.
Response at 15 kHz does not vary
between FLAT and LPASS by more
than 1%
Upper and lower –3 dB points are
approximately
±
350 kHz from
3.579545 MHz. 15 to 35 °C operating
temperature.
Upper and lower –3 dB points are
approximately
±
350 kHz from
4.433619 MHz. 15 to 35
°C operating
temperature.
13
17
18
Transient response Preshoot:
≤
1%
Pulse-to-Bar Ratio: X1: 0.99:1 to
1.01:1X5: 0.98:1 to 1.02:1
Overshoot: X1: 2% or less X5: 4%
or less
Ringing: X1: 2% or less X5: 4% or
less
Specifications apply for full screen
height video input signal, with variable
GAIN off. 15, 16
Field rate tilt
≤
1% Field rate square wave or vertical
window 15
Line rate tilt
≤
1% 25 ms bar 15
Overscan Less than 2% variation in baseline of
100 IRE (700 mV) 12.5T (20T)
modulated pulse as it is positioned
over the middle 80% of the screen. 15
Differential gain Displayed differential gain is
≤
1% with
10% to 90% APL changes.
Chroma filter must be selected.
Baseline at 50 IRE and displayed
subcarrier adjusted to 100 IRE with
VAR gain.
Deflection factor 140 IRE (1.0 V) within 1% with 1 V
input. 1 V full scale. 20-30
°
C, Flat response
selected. Vertical gain temperature
coefficient is –0.3%/10
°
C.
9