Racal Instruments 1256 Manual page 44

Publication No. 980855 Rev. A
EADS North America Test and Services
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1. Press the top key next to the display. This selects the top
display line so that you can change it. The selection markers
">" and "<" appear on the line to indicate that it is selected.
Rotate the knob until the top line reads:
>----OPERATIONS----<
2. Select line 2 (next to the top line) by pressing the second
key. This selects line 2 so that you may select the slot to
work with:
----OPERATIONS----
>Slot 01: 1260-121A
Channel: 0
Status: Open
3. Rotate the knob until line 2 indicates the contents of slot 3:
----OPERATIONS----
>Slot 03: 1260-118
Channel: 0
Status: Open
4. Press the third key to select line 3 of the display (channel
number):
----OPERATIONS----
Slot 03: 1260-118
>Channel: 0
Status: Open
5. Rotate the knob until line 3 shows the desired relay channel
number, which in this example is 4:
----OPERATIONS----
Slot 03: 1260-118
>Channel: 4
Status: Open
6. Press the fourth key to select line 4. Rotate the knob until
the display reads:
----OPERATIONS----
Slot 03: 1260-118
Channel: 4
<Set to?: Closed
7. Press the fourth key to confirm the closure of the relay
channel. The relay then closes, and the display indicates the
updated status on line 4:
----OPERATIONS----
Slot 03: 1260-118
Channel: 4
> Status: Closed
Opening a Relay
1256 User Manual
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Using the Front-Panel Controls 3-9