Tektronix WFM90D, Quick Start Manual, Page: 21 / 170

Specifications
WFM90D and WFM91D Service Manual
1- 3
Table 1- 1: Vertical deflection system (Cont.)
Category Description
Deflection Factor
REQ:
Analog Input, 1 V Full Scale:
1 V input displayed within 1% of 140 IRE
REF:
Flat filter selected.
REQ:
Digital Input, 1 V Full Scale:
1 V input displayed within 2% of 140 IRE
REF:
Flat filter selected.
REQ:
X5 Gain:
Gain accuracy within 5% with 1 V input signal.
REF:
X5 Gain Registration:
≤
1 major division of vertical shift from baseline between unmagnified and magnified signal.
REQ:
Variable Gain Range:
Input signals between 0.8 V and 2 V can be adjusted to 140 IRE (1.0 V) display. 160 mV to 400 mV
for X5 Gain.
REQ:
Position Range:
1 V signal can be positioned so that peak white and sync tip can be placed at blanking level, with the
DC RESTORER on, regardless of gain setting.
Transient Response
Analog Input
REF:
Specifications apply for full screen height video input signal, with VARIABLE GAIN off, 1 V Full
Scale or X5 Gain selected, and FLAT filter selected.
REF:
Pulse-to-Bar Ratio:
X1: 0.99:1 to 1.01:1.
X5: 0.98:1 to 1.02:1.
REF:
Preshoot:
≤
1%.
REF:
Overshoot: X1:
≤
2%.
X5:
≤
4%.
REF:
Ringing: X1:
≤
2%.
X5:
≤
4%.
REF:
Field Rate Tilt:
≤
1%.
REF:
Line Rate Tilt:
≤
1%.
REQ:
Overscan:
≤
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.