Specifications
1-4 WFM90D and WFM91D Service ManualTable1- 1: Verticaldeflection system (Cont.)
Category Description
TransientResponse
Digital Input REF: Specifications apply for full screen height video input signal, with VAR GAIN off, 1 V Full Scale
orX5 Gain sel ected, and FLATfilt ersel ected.
REF: Pulse-to-BarRat io:
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%
Maximum Absolute Input
Level
REF: ±5 VDC plus peak AC.
REF: Displays in excess of 200 IRE (1.428 V) may cause frequency response aberrations.
DCI nput Impedance
(Unterminated)
REQ: ≥15 kΩ.
REF: With input switch in the HIZ position.
VideoInput Return Loss REF: ≥40 dB from 50 kHz to 6 MHz
≥15dB f rom 6 MHz to 270 MHz
REF: With75 Ωtermi nation on.
VideoOut Ret urnLoss
(75 Ω)
REF: ≥30 dB from 50 kHz to 6 MHz.
VideoOut Di fferential
Gain (50% APL)
REF: Within 1% with a 140 IRE (1.0 V PAL) unit display. Analog input only.
VideoOut Di fferential
Phase(50% APL)
REF: Within1°with a 140 IRE (1.0 V PAL) unit display. Analog input only.
Table1- 2: DCr estoration
Category Description
DCRest orerCl amp Time REF: Back Porch.
FrequencyResponse
at 60 Hz (50Hz PAL)
REQ: Attenuation of 60 Hz (50 Hz PAL)on Input Si gnal:
Slow Mode: ≤20%.
Fast Mode: ≥90%.
REF: 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 PAL) or less.
REF: Blanking Level Shift Due to Presence or Absence of Burst: 1 IRE unit (7.14 mV PAL) or less
shift from no color burst to presence of color burst.