Models 707B and 708B Switching Matrix Reference Manual
Section 2: General operation
707B-901-01 Rev. B / January 2015
2-15
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
(on page 2-91).
You can also open and close channels by pressing
CHAN
to use the
(on page 2-20).
Selecting channels from the front panel
From the front panel, you can change the display to show another card slot, choose a specific
channel, and open and close channels. For the 707B, the crosspoint display shows you the status of
the channels for one card at a time.
To display a different slot:
Press the navigation wheel, then turn the navigation wheel to the right to go to the next slot or to the
left to go to the previous slot. You must go through all of the rows on one slot to go to the next slot.
To choose a specific row:
1. When you are displaying the slot that contains the row, press the navigation wheel . The red
lights for that row are displayed.
2. Turn the navigation wheel to go to the row you want to select.
3. Press the navigation wheel to select the row. The red lights for each crosspoint in the row are
on, as shown in the following figure.
Figure 18: One row selected
On the Model 707B, if you scroll past the last row, you will go to the next slot.