Keithley 708B Reference Manual page 35

Section 2: General operation
The crosspoint display has a list of slots on the right. To the left of the slot list are lights that show you
an overview of the cards in the instrument's slots.
The red lights indicate closed channels. If a red light is on, a channel in that slot is closed. If the red
light is not lit for a slot, all channels in that slot are open. In the figure above, the card in slot 2 has at
least one closed channel.
The yellow lights indicate which slots contain a card and which slot is presently displayed on the
crosspoint display. When a yellow light is on, the slot contains a card. When a yellow light is off, the
slot does not contain a card. If the yellow light is brighter than the others, that slot is being displayed
on the crosspoint display. In the figure above, there are cards in five slots, no card in slot 5, and the
channels for the card in slot 3 are displayed on the crosspoint display.
Crosspoint display description
The crosspoint display displays all channels for one card slot at a time. If there are no cards in the
instrument's slots, the crosspoint display shows "No card in unit."
The rows are labeled by default with the slot number following by the row number. For example, slot 1
would start with 1A, 1B and slot 2 would start with 2A, 2B and so on.
The columns are labeled by default as 01, 02, and so on.
If a red light is on at a row-column crosspoint, the channel at the crosspoint is closed. If no red light is
on, the channel is open. Channels appear in different LED intensities when a row is selected.
Channels that are closed appear brighter than ones that are presently selected.
You can change the label names; see
You can also open and close channels by pressing CHAN to use the
(on page 2-22).
2-16
Models 707B and 708B Switching Matrix Reference Manual
Figure 17: Model 707B slot indicators
Red lights are lit
if a channel is
closed in that slot
Yellow lights are lit when
the slot contains a card.
The bright light shows
which slot is displayed
on the crosspoint display
Set up labels
SLOT 1
SLOT 2
SLOT 3
SLOT 4
SLOT 5
SLOT 6
(on page 2-98).
Channel Action Menu options
707B-901-01 Rev. A / August 2010