Keysight E4981A - Page 159

Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter 159
Using Scanner Interface
Input/Output Signal Pin Assignment
6 /INDEX Output
Analog measurement end signal. When an
analog measurement finishes, this becomes
LOW. When this signal is received, you can
change the channel of the scanner. You cannot
obtain the measured data until the /EOM
signal is received.
7EXT_DCV
Input
External power input. Supplies the voltage to
the output signals (/INDEX and /EOM) and
input signals (EXT_TRIG, /CH0 - /CH7, and
/CH_VALID). The input voltage range is
between +5 V and +15 V.
8/CH1
Channel number selection signal (8-bit binary
input). Selects the correction data for each
channel of the scanner. The most significant
bit is /CH7 (pin number 11). The least
significant bit is /CH0 (pin number 1).
9/CH3
10 /CH5
11 /CH7
12 EXT_TRIG Input
External trigger signal. This is available when
the trigger mode is set to the external trigger
(Ext). The trigger is generated at the rising
edge of a pulse. When this trigger pin is not
used, the pin should be connected with GND
(LO).
13 /EOM Output
Measurement cycle end signal. When a series
of measurement processes finishes and the
measured data becomes available, this
becomes LOW.
14 COMMON ———
Common pin for the external DC voltage
EXT_DCV (pin number 7).
Table 9-1 Description of input/output signals of the scanner interface
Pin
number
Signal
name
Input/
Output
Description