Section 4
:
Frequently Asked Questions
Series 3700 System Switch/Multimeter Quick Start Guide
4-6
Document Number: 3700S-903-01 Rev. A / August 2007
Reference
Slot
Row
Column
3112
3
1
12
6101
6
1
01
Figure 4-2: Matrix card display
Channel list parameter <ch_list>
The channel list parameter <ch_list>, used when controlling the Series 3700's relays over the
bus, is a string-type parameter. An example:
Channel 1 (of Slot 1) is associated with analog backplane relays 3 and 4, while Channel
3 (of the same slot) has analog backplane relays 5 and 6. The <ch_list> used in this
example is ("1001, 1003"). The response to a channel.getbackplane("1001, 1003") will
be "1913, 1914;1915,1916". To associate the backplane relays as indicated with
Channel 1, the corresponding command would be channel.setbackplane('1001', '1913,
1914').
Therefore, when sending this parameter:
Enclose the contents of the channel list in either single (') or double (") quotes, but the
quote style must match.
Use a comma or semicolon to separate the channel list or channel patterns.
The string may contain a single channel, channel pattern or analog backplane relay as
well as multiple ones that are indicated by a range or comma separated.
Use a colon to specify a range of channels. Example:
channel.getbackplane("1001:1003") responds with the range of Slot 1 channels from 1 to
3.
Although a parameter string may be valid, the command that calls it will determine the string's
ultimate validity. For example, only channels have a pole setting (channel patterns do not). If a
channel pattern is passed to the poles setting command, an error would be generated.
Channel patterns may be included as a <ch_list> parameter.
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