User manual

Appendix A: Performance Specification
WFM 90 & WFM 91 User Manual
A–3
A-1.
Vertical deflection system (Continued)
CATEGORY
DESCRIPTION
Transi
ent Response
REF: Specifications apply for full screen
height video input signal, with VARI-
ABLE GAIN off, 1 V Full Scale or X5
Gain selected, and FLAT filter se-
lected.
REF: Pulse-to-Bar Ratio:
X1: 0.99:1 to 1.01:1.
X5: 0.98:1 to 1.02:1.
REF: Preshoot: v1%.
REF: Overshoot: X1: v2%.
X5: v4%.
REF: Ringing: X1: v2%.
X5: v4%.
REF: Field Rate Tilt: v1%.
REF: Line Rate Tilt: v1%.
REQ: Overscan: v2% variation in baseline of
100 IRE (700 mV) 12.5T (20T) modulated
pulse as it is positioned over the middle
80% of the screen.
Maximum Absolute Input
Level
REF: $5 VDC plus peak AC.
REF: Displays in excess of 200 IRE
(1.428 V) may cause frequency re-
sponse aberrations.
DC Input Impedance
(Unterminated)
REQ: w15 kW.
REF: With input switch in the HIZ position.
Video Input Return Loss REF: w40 dB from 50 kHz to 6 MHz with
75 W termination on.
Video Out Return Loss (75W) REF: w30 dB from 50 kHz to 6 MHz.
Video Out Differential Gain
(50% APL)
REF: Within 1% with a 140 IRE (1.0 V PAL)
unit display.
Video Out Differential Phase
(50% APL)
REF: Within 1° with a 140 IRE (1.0 V PAL)
unit display.