Local Operation
3-11
2. Select RANGE = 150V in SETUP functional list, apply external V=
4.715Vac, the Vout = 100Vac.
DC_LEVEL_CTL: The output voltage (Vout (ac)) responses linearly proportional to the
controlled DC level with voltage ranging from -10 V to 10 V. Vout
can be calculated using the following formula:
Vout (ac) = Vref (dc) / 10 Vdc × 300Vac (300V RANGE)
Vout (ac) = Vref (dc) / 10 Vdc × 150Vac (150V RANGE)
Example (1): set Vout to 100Vac:
1. Select RANGE = 300V in SETUP functional list, apply external V= 3.333Vdc
(or -3.333Vdc ), the Vout = 100Vac.
2. Select RANGE = 150V in SETUP functional list, apply external V=
6.667Vdc ( or -6.667Vdc ), the Vout = 100Vac.
The procedures of setting EXT. V = ON, COUPLE = DC_LEVEL_CTL, are described as
below:
1. Move the cursor to the command
of “EXT. V = ”. EXT.V = OFF_ COUPLE=AC_AMPLIFIER
2. Turn RPG to change the option from
OFF to ON, then press ENTER . EXT.V = ON COUPLE=AC_AMPLIFIER_
3. The cursor moves to the command EXT.V = ON COUPLE=DC_LEVEL_CTL
line of “COUPLE = ” automatically.
4. Turn RPG to select DC_LEVEL_ EXT.V = ON COUPLE=DC_LEVEL_CTL_
CTL, then press ENTER.
When EXT. V=ON, COUPLE=DC_LEVEL_CTL, the output voltage (Vout)
will respond to the external control DC voltage level only. The user
cannot control Vout amplitude through the keypad on the front panel, until
1. As COUPLE = AC_AMPLIFIER and the frequency of Vref is over
1000Hz, it might cause AC source damage. The user should obey
the formula if F>1000Hz: Vref (pk-pk, V) × F (Vref, Hz) < 10000 VHz
2. Because of the bandwidth limitation of AC source, the output may
distortion. Especially when external V reference consists of high
3.6.3 POWER ON STATUS
The AC source allows the user to set the status of the output when power is switched on.
The user can set POWER ON STATUS on CONF functional list (see 3.6). After setting, the
user should save them in Group1 before powering off (see 3.8.2).
To set the output is on, as 120 Vac, 50Hz, 10Vdc when power-on.
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