Keysight E4981A - Input Signal

Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter 149
Using Handler Interface
Electrical Characteristics
Figure 8-5 Circuit diagram of operation output signals of the handler interface
Input signal
Each input signal is supplied to the cathode of the photo coupler LED. The
anode of the LED is connected to the drive source voltage. Table 8-6 shows the
electrical characteristics of the input signals. Figure 8-6 shows the circuit
diagram of the input signals. The amount of current flowing through the LED
depends on the setups of the drive source voltage and the input signal resistor.
The S1, S2, S3 switches belongs to electrical switches that can be control by
the following SCPi command :SYSTem:HANDler:TRIGger:VOLTage <para>
e4981aoe0005
Handler
interface
connector
/ALARM
/INDEX
/EOM
COM2
/READY_FOR_TRIG
Pull-up resisters
Power
Supply
Table 8-6 Electrical characteristics of the handler interface input signals
Input signal
Input voltage [V]
Input current (LOW) [mA] (typical)
Drive source voltage: DCV2
LOW HIGH 5 V 12 V 15 V 24 V
EXT_TRIG
0 - 1 DCV2
2.7 3.6 4.4 6.3
/KEY_LOCK 2.8 7.0 9.0 14.5