Mainframe Features; Trigger Input; Trigger Output; Pc Card Ata Interface (2686A Only) - Fluke 2680A User Manual

2680A/2686A
Users Manual

Mainframe Features

Trigger Input

Trigger Input is an instrument connection used to trigger scans from an external
source. The connection uses the rear panel Trigger In and GND (Figure 1-4). A
logic low or contact closure between Trigger In and GND triggers an instrument
scan if External Trigger is enabled. While the trigger input line is held low, the
instrument continues to scan at Interval 2.
When there is no trigger input, an internal pull-up resistor holds the input at logic
high (nominal +5.0 V dc).

Trigger Output

Trigger Output is an output line that, when enabled, goes to logic low for 125 µs
every time a scan begins. The connection uses the rear panel Trigger Out and GND
(Figure 1-4). Use the Trigger Output to trigger other instruments by their Trigger
Input connection and to interface with external equipment. An internal pull-up
resistor holds the trigger output line at a logic high (nominal +5.0 V dc) when
there is no trigger output.

PC Card ATA Interface (2686A Only)

A PC ATA card interface provided in each 2686A system. It can be used to store
data when there is no network connection. The data produced is DOS compatible.
When scanned data is first recorded on the card, a copy of the configuration of the
instrument is also recorded. As a result, you can stop scanning, remove the card,
read results, reinstall the card in the same instrument, and restart scanning and
have only one file created. If you want to clear the existing memory card, the front
panel keys can be used to erase the card contents. You can use up to 2 GB ATA
compatible PC Card in a 2686A instrument. See Chapter 2 for additional
information.
An error will result if a card has partially been filled with data from a different
configuration. This can be fixed by using the front panel keys to erase the existing
data in the card.
Removing the PC card while the storage LED is on may
cause a loss of data. Before removing the card, stop the
instrument scanning. Loss of power while data is being
written to the card may also result in loss of data.
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