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Output On/Off Synchronization Appendix D
Series N6700 User’s Guide 101
By setting the common delay offset to be greater than or equal to the
largest minimum delay offset, you can synchronize the programmed
turn-on delays as shown in the following example.
Since there will be an additional delay due to the common delay
offset, you will need to account for the additional delay time. As
shown in the previous example, if you program a common delay of 60
ms and user-programmed delays of 10 ms, 20 ms, 30 ms, and 40 ms
for output channels 1 through 4, the actual output delays from the
“on” event will be 70 ms, 80 ms, 90 ms, and 100 ms respectively.
Even though this 60 ms delay offset will be seen on all outputs, the
additional delay time will not affect most applications because the
relative delay times between output module turn-on will still be 10
ms, 20, ms, 30 ms, and 40 ms – the exact values originally specified.
NOTE
If you have previously characterized the minimum turn-on delays of the power
modules that you are synchronizing as described in chapter 4 of this guide and
have incorporated this delay in your application program, you do not need to
rewrite your test program. Your application will continue to work as before.
Procedure
To configure the output turn-on delays:
1. Enable the turn-on synchronization function on the mainframe.
2. Specify the output channels that will be synchronized or coupled.
3. Specify the user-programmed turn-on delay for each output
channel that will be synchronized.
4. This step is required if you have power modules with different
minimum delay offsets. Specify a common delay offset for all of
the synchronized output channels. When the common delay
offset completes, the user-programmed turn-on delays will start.
1. Enable the Synchronization Function
Output turn-on synchronization must be enabled on the mainframe.
Front Panel: SCPI Command:
In the front panel menu, select
Output\Couple.
Check the box labeled “Enable”.
To disable, uncheck the box.
To enable, send:
OUTP:COUP ON
To disable, send:
OUTP:COUP OFF
N6731B w/relays (1)
N6751A (2)
N6751A w/relays (3)
N6761A (4)
60 10
10
milliseconds
20 30 40 50 60 70 80
60
60
60
20
30
40
90 100
60 ms
= common delay offset
ON