Keysight E4990A - Page 313

Programming
303
trigger signal.
The /READY FOR TRIGGER signal goes to the
Low level when the instrument is ready to
accept the trigger signal for the first point and
goes to the High level when the trigger signal
for the first point is received.
When the point trigger is OFF: When
measurement of all measurement points is
completed and the instrument is ready to
receive the trigger signal for the first point of
the next sweep, this signal goes to the Low
level again.
When the point trigger is ON: When each
measurement point is completed and the
instrument is ready to receive the trigger signal
for the next measurement point, this signal
goes to the Low level again.
21 /PORT C0 Bit 0 of port C (4 bit parallel I/O port).
22 /PORT C1 Bit 1 of port C.
23 /PORT C2 Bit 2 of port C.
24 /PORT C3 Bit 3 of port C.
25 /PORT D0 Bit 0 of port D (4 bit parallel I/O port).
26 /PORT D1 Bit 1 of port D.
27 /PORT D2 Bit 2 of port D.
28 /PORT D3 Bit 3 of port D.
29
PORT C
STATUS
Port C status signal. This signal is changed to
the High level when the port C is configured to
output port. It is changed to the Low level
when the port is configured to input port.