NF HVA4321, Instruction Manual

Page: 114 / 152

4.6 Remote control
HVA4321
4-58
4.6.2 Panel setting for use of remote control
Set the ON/OFF CONTROL switch on the front panel to REMOTE.
When the switch is set to REMOTE, LEDs of DC BIAS ON/OFF, OSC INPUT ON/OFF and EXT DC
BIAS INPUT ON/OFF switches go off regardless of ON/OFF status of these switches, indicating that the
switching function is invalid.
If this operation is performed while SIGNAL is ON, it is forcedly OFF.
Figure4-73. Remote control switch
4.6.3 Connection of control signal
Connect the control signal to the BNC connector at the back. TTL level logic signal and contact signal can
be used as control signal.
OFF : Hi (TTL level: Positive logic)
Open (Contact signal)
ON : Lo (TTL level: Positive logic)
Close (Contact signal)
When only the HIGH VOLTAGE POWER SUPPLY ON/OFF switch at the front panel is ON and when
the HIGH VOLTAGE POWER SUPPLY ON/OFF signal at the back panel is ON, the internal high
voltage DC power supply is ON.
CURRENT
SELECT
LOAD
TOTAL
ON/ OFF
CONTROL
REMOTE
LOCAL
ON
OFF
EXT DC BI AS
I NPUT
TTL(Lo: ON)
Zout 10k
Ω
SI GNAL ON/ OFF STATUS
OUTPUT
± 10V MAX
Zi n 10k Ω