I/O Signal Pin Layout and Description

Pin Number

Signal

Signal Specification

1

GND

0 V. Ground

2

/INPUT1

When this port receives a negative pulse, /OUTPUT1 and /OUTPUT2 are changed to the Low level.

3

/OUTPUT1

Changes to the Low level when /INPUT1 receives a negative pulse. A command is available for altering the Low/High level logic.

4

/OUTPUT2

Changes to the Low level when /INPUT1 receives a negative pulse. A command is available for altering the Low/High level logic.

5

/PORT A0

Bit 0 of port A (8 bit parallel output port).

6

/PORT A1

Bit 1 of port A.

7

/PORT A2

Bit 2 of port A.

8

/PORT A3

Bit 3 of port A.

9

/PORT A4

Bit 4 of port A.

10

/PORT A5

Bit 5 of port A.

11

/PORT A6

Bit 6 of port A.

12

/PORT A7

Bit 7 of port A.

13

/PORT B0

Bit 0 of port B (8 bit parallel output port).

14

/PORT B1

Bit 1 of port B.

15

/PORT B2

Bit 2 of port B.

16

/PORT B3

Bit 3 of port B.

17

/PORT B4

Bit 4 of port B.

18

/PORT B5

Bit 5 of port B.

19

/PORT B6

Bit 6 of port B.

/INDEX

Indicates that analog measurement is complete. The /INDEX signal changes to the Low level when analog measurement (all sweeps of all channels) is complete. When the handler receives the signal, it assumes that it is ready to connect the next DUT. However, no measurement data is available until data calculation is completed.

When the point trigger function is ON, it goes to the High level before starting measurement of the first measurement point and returns to the Low level after completing measurement of all measurement points.

20

/PORT B7

Bit 7 of port B.

/READY FOR TRIGGER

Indicates that the instrument is ready for triggering. This signal is changed to the Low level when the instrument is ready to receive a 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.

30

PORT D STATUS

Port D status signal. This signal is changed to the High level when the port D is configured to output port. It is changed to the Low level when the port is configured to input port.

31

/WRITE STROBE

A output port write strobe signal. When data is present (that is, output level changes) on any of the output ports, this signal provides a negative pulse.

32

+5V pull-up

Provides +5V DC power supply for external instruments.

33

/SWEEP END

A sweep completion signal. When measurement (all sweeps of all channels) and data calculation are completed, this signal provides a negative pulse.

34

+5V

Provides +5V DC power supply for external instruments.

35

/PASS FAIL

Each limit test's results signal. This signal changes to the High level when limit test, or bandwidth test results return FAIL. It changes to the Low level when all limit test results return PASS.

36

/PASS FAIL STROBE

Each limit test's results write a strobe signal. When limit test result is present on /PASS FAIL, this signal provides a negative pulse.