Electrical Characteristics; Output Signal - Keysight E4981A User Manual

Using Scanner Interface

Electrical Characteristics

Electrical Characteristics

Output signal

The output signals (/INDEX and /EOM) are available as open collector outputs
with photo coupler isolated. You can obtain each voltage output by connecting
a pull-up resistor (refer to
Table 9-2 Guide for pull-up resistor values
Table 9-3
shows the circuit diagram of the output signals.
Table 9-3 Electrical characteristics of the scanner interface output signals
Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter
Pull-up vol tage
Resistance value [Ω]
[V]
5 1.7 k (5 V/3 mA)
9 3.0 k (9 V/3 mA)
12 4.0 k (12 V/3 mA)
15 5.0 k (15 V/3 mA)
shows the electrical characteristics of the output signals.
Output signal
/INDEX, /EOM
1. EXT_DCV: +5 V - +15 V
Table 9-2) to the exterior of the E4981A.
Resistance
value [Ω]
1.78 k
3.16 k
4.22 k
5.11 k
Output vol tage [V]
LOW
0 - 0.5
Typical resistance
Keysight part
number
0757-0278
0757-0279
0698-3154
0757-0438
Figure 9-4
Maximum
current
HIGH
[mA]
1
EXT_DCV
6
161