Bnc 725 Manuel d'utilisateur télécharger pdf (Page 16)

Channel properties are organized by tabs. The tabs that are relevant for a particular timing mode

appear automatically when that timing mode is selected. For convenience, all settings are retained

and saved, including those for timing modes that are not currently selected.

Four additional buttons appear next to the tabs:

- Disable temporarily disables the channel. The channel remains fixed in its “quiescent

state” (see Quiescent States below). The front panel LED for that channel will be unlit

(See Running Experiments: Channel LEDs).

- Enable restores channel functions following a temporary disable. The front panel LED

for that channel will glow to indicate the channel's status.

- Reset reinitializes the internal trigger counters and sweep timing for the current channel.

This function can be called simultaneously for all channels by pressing the Reset button

on the main tool bar.

- Force Trigger lets you simulate a valid input signal for the channel (see Channel

Properties: Logic for more). This button, which is only available with functions that can

be triggered, is useful both for troubleshooting your channel settings and implementing

software control of experiments. You can also force-trigger a channel from the Model

725 front panel (See Running Experiments: Force Trigger).

Quiescent States

When you disable a channel, its input will not change the output. The “quiescent state” of a

channel is the setting of its output when the channel is disabled. You can set each channel’s

quiescent state to be a TTL high (3.5–5 V) or low (0–0.2 V) to provide a safe signal to the output

device if you need to abort an experiment or stops its progress.

The method for setting the quiescent state depends on the timing mode. Most modes include an

Invert Output option which sets the output normally High.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 62 63

Pas de commentaire

Bnc 725 Manuel d'utilisateur Page 16