SDA9361 Datasheet, PDF (26/47 Pages) Siemens Semiconductor Group – DDC-PLUS-Deflection Controller

SDA 9361
Vertical EHT Compensation
This item controls the influence of the beam current dependent input signal ABL on the
outputs VD+ and VD- according to the following equation:
∆V_VDPP
=
∆V_ABL
*
V-----e---r--t--i-c---a---l---E----H-----T-----c---o---m-----p----e---n---s---a----t-i--o---n--
512
*
0,57^{1 )}
(if RABL = 0)
∆V_VDPP
=
∆V_ABL
*
V-----e---r--t--i-c---a---l---E----H-----T-----c---o---m-----p----e---n---s---a----t-i--o---n--
2048
*
0,57^{1 )}
∆V_VDPP: variation of VD+ and VD- peak-to-peak voltage
∆V_ABL: variation of ABL input voltage
1) _{The factor 0.57 depends on VREFP, VREFH, VREFL}
(if RABL = 1)
If Vertical EHT Compensation = 0 the outputs VD+ and VD- are independent of
the input signal ABL.
Horizontal EHT Compensation
This item controls the influence of the input signal ABL on the output E/W according to
the following equation:
∆V_EW
=
∆V_ABL
*
H-----o----r--i--z---o----n----t--a---l---E----H-----T-----c---o----m-----p---e---n----s---a---t--i-o---n--
128
*
2,12^{1 )}
(if RABL = 0)
∆V_EW
=
∆V_ABL
*
H-----o----r--i--z---o----n----t--a---l---E----H-----T-----c---o----m-----p---e---n----s---a---t--i-o---n--
512
*
2,12^{1 )}
(if RABL = 1)
∆V_EW: variation of E/W output voltage
∆V_ABL: variation of ABL input voltage
1) _{The factor 2.12 depends on VREFP, VREFH, VREFL}
If Horizontal EHT Compensation = 0 the output E/W is independent of the input
signal ABL.
AFC EHT Compensation
Deviation of the horizontal phase caused by high beam current (e.g. white bar) can be
eliminated by this control item. The beam current dependent input signal ABL is
multiplied by AFC EHT Compensation.
Semiconductor Group
26
1998-02-01