Users Manual
Model 3600
www.globalspecialties.com
Page 22
switch, the key
【
1
】
connects the switch. If the start select switch is
connected, “the start conditions” will be short-circuited eliminating
their use. For example, after pressing
【
Single
】
, the sampling process
starts directly without detecting the start conditions, equal to random
sample manually.
The default setting of the “start select switch” is “connect” in order
to make random sampling without specific sampling purpose and not
needing to set the start conditions. If the setting of the start select
switch is “open”, then only the tested signal with specific sampling
purpose can set the suited start conditions.
Trigger Conditions
When sampling starts up, the instrument writes the sampling data
into the high-speed memory continuously according to the sampling
clock time. Once the memory is filled, it will be return to the top of the
memory stack and overwrite the former data.
The sampling purpose is to make limited storage data blocks that
contain the signals of concern. The user needs to set the appropriate
trigger conditions to capture the desired signals. After the signals are
captured and stored, the instrument takes a short time of “store delay”
and the sampling process stops automatically. The suitable setting of
trigger conditions can decrease storage of useless data which improves
the effective utilization of the memory.
The start “bit-select” can be set with numbers in Hex, representing 32
input channels. If the bit-select is set to 0, this indicates the channel
will be ignored. It is not involved in the start match checking and has
no influence on start time regardless of signal level of this channel.
If set bit-select is set to 1, this indicates the channel is effective and is
included in the start matching checking. The default setting of start bit-
select is 0000FFFF, means that only check 00~07 channels, ignore 08~31
channels. The default setting is only an example, the user can configure
it for their needs.
The start “compare word” can be set with numbers in Hex, the default
setting of start compare word is 00000069. This means once Hex
number 69 appears in 00~07 channels in the input data streams the
trigger condition is satisfied. Meaning when the logic level of 00~07
channels is “01101001”the trigger condition is satisfied.
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