Pass/Fail Output Via Usb Connector - Picotest M3500A User Manual

5.1 Pass/Fail Output via USB Connector

The USB connector, which comforns to USBTMC protocol, on the rear
panel of M3500A is a series "B" connector. When the USB interface is
disabled (IEEE-488 interface is selected), the internal pass and fail TTL
output signals (limit testing) will be transmitted via the USB port.
The pass and fail signals are low true and indicate the Math Pass/Fail
Limit Test result for the next reading to be output to the GPIB interface.
The signals are active low for approximately 2ms (
reading taken. Figure 2-17 shows the USB connector (series "B"). And
Table 5-1 shows the detailed connector information.
If you disable the USB interface, the Pass/Fail output function will enable
Contact
Number
1
2
3
4
automatically. Please follow the procedure below to enable/disable this
function.
Procedure: MENU
Or you can do this by the other way:
Figure 2-17
Table 5-1
Signal Name
VBUS
D-
D+
GND
→
INTERFACE
117 117
117 117
±
100
Typical Wiring
Assignment
Red
White
Green
Black
→ →
USB ENABLE/DISABLE
µ
sec) for each
Description
Floating
Limit Test Pass
Limit Test Fail
GND