KEPCO BHK-MG 200W (Full Rack) Series - Manual (Page 86)

3-42
BHK-MG (OPR) 022014
3.6.3.1 VOLTAGE MODE
With the power supply in voltage mode (see Figure 3-11 or 3-12) and the digitally programmed
output voltage at zero, varying the low impedance voltage source from 0 to +10V causes the
output voltage of the power supply to vary linearly from 0 to Eomax with a slope of (0.1 x
Eomax) volts per volt. The following equations give the output voltage as determined by a low
impedance voltage source V
EXT
.
ANALOG PROGRAMMING, DIGITAL PROGRAMMING = 0:
Eo = (–1)
(V
EXT
) x (10K/10K) x (–1) (10K/10K) x (–1) (R/10K)
= (–1) (0.1 x R) x V
EXT
= –0.1R x V
EXT
(V d-c)
where
R = Internal feedback resistance (K-ohms), determined by Model (see Table 3-10).
V
EXT
= External low impedance voltage source. This source can be either a d-c source deliver-
ing a positive output voltage, or a function generator with an internal positive bias. If the
bias is not available from the function generator, use the digital programming feature of
the BHK-MG to provide proper bias to avoid clipping the waveform at the output of the
power supply.
ANALOG PROGRAMMING COMBINED WITH DIGITAL PROGRAMMING:
Eo = –(0.1 x R x V
EXT
) – Eout
DP
(V d-c)
where
Eout
DP
= Output voltage programmed digitally (from either local keypad or remote GPIB bus)
(See above for definitions of R and V
EXT
.)