Chroma 61501, Руководство пользователя, Страница: 45 / 134

Local Operation
3-19
The procedures for setting output impedance Prog Zo = ON, R = 0.4
Ω
, and L = 0.8mH, are
described as below:
1. Move the cursor to the command line
Prog Zo = OFF_
of “Prog Zo = OFF ”.
2. Turn RPG to change to “ON”, then press
ENTER
. Prog Zo = ON
3. The cursor moves to the command line
of “R = ” automatically.
4. Press
0
,
.
,
4
, then press
ENTER
R = 0.4_
Ω
L = 0.00 mH
to change R to " 0.4
Ω
".
5. Press
0
,
.
,
8
, then press
ENTER
R = 0.40
Ω
L = 0.8_ mH
to change L to " 0.8 mH".
1. When Prog Zo = ON, the AC source reprogram the output waveform
to meet the setting by using current feedback. When Prog Zo =
OFF, the output impedance is just the original value of AC source.
2. The function of programmable output impedance is no effect for DC
output.
WARNING
The maximum of R is 1.0
Ω
, L is 1.0 mH. But if L is larger than 0.5mH
and output voltage is low ( <100Vac ), it’s possible to cause AC Source
unstable especially when output current is large. Users have to
program the inductance to the target level slowly, monitor the output
voltage and listen the sound of AC Source whether there are abnormal
high frequency voltage output or abnormal voice. If instability happens,
disable the output impedance programming and use an external
impedance network.
3.7.4 Slew Rate of Output Transient
AC source can control the transition waveform of the output by setting COUPLE on OUTPUT
functional list (see 3.7). User can set three commands to achieve the transient state of
output waveform: Vs (V/ms), Fs (Hz/ms), DCs (V/ms).
Vs : the slew rate of output Vac.
Fs : the slew rate of output frequency.
DCs : the slew rate of output Vdc.
When users run OUT of AC source or change the output setting in MAIN PAGE, the output
voltage and frequency will change corresponding to the Vs, Fs, DCs commands.
The procedures of setting Vs (V/ms)=0.2, Fs (Hz/ ms)=0.1, DCs (V/ms)=1, are described as
below: