2201R Mobile Tester SCPI Reference Guide
Chapter 2 Remote control of the 2201R Mobile Tester
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Summary 2: from the condition-type to the event-type registers
•
There are two detectors for every bit of a condition register: the positive transition and the negative transition
branch. Positive transition means a change of a bit from a binary
0
to a binary
1
while a negative transition is a
bit change from a binary
1
to a
0
.
•
To every branch, there is a filter mask (PTR and NTR mask). This filter mask is user-definable.
•
The filter mask and the result of the transition filter are combined using a logical AND operation.
•
The results of the AND operation in both branches are combined, using a logical OR operation.
•
The results of the OR operation are the contents of the related event-type register.
Moving up: an event reaches the condition register one hierarchical level up
The Event register contains summary bits, corresponding to the bits of the condition register. A summary bit is set
when the initial event passes the transition filter.
The Enable filter is a mask to filter events that are allowed to move one level up. The Enable filter is user-definable
(using the
STAT:xxxx:ENABle
commands) and again contains as many bit positions as the condition-type
register.
Again, the Enable filter mask is ANDed with the Event register and a nonzero result finally sets the Result bit. This
Result bit may be a summary bit either in a higher-level register, or in the service register.
Summary 3: raising the Result bit
The event-type register is ANDed with the related Enable filter mask.
The Enable filter mask is user-definable.
The result of the logical AND operation between event-type register and related Enable filter is the Result bit.
The result bit sets the corresponding bit of the condition register one level up.
At the top: the service register
The service register contains eight summary bits: three for the status groups available on the 2201R, two for internal
queue handling, two for remote control and one bit for it's own status: the summary status bit.
When an event passes through and sets one of the seven corresponding summary bits of the service register, the
contents of the service register are ANDed with the service register mask. This mask can be set using the
*SRE
common command.
When the logical AND operation of the current contents of the service register and the service register mask leads to
a binary
1
, then the summary status bit is set as well.
Table of registers
The STATus subsystem uses and/or provides access the following registers:
Service register
This register represents the highest level within the report structure of the 2201R.
The service register contains eight bits. A detailed description of the service register can be found in the appendix
(SCPI Command Reference).
Event status register group
This group of registers collects all general events of the 2201R Mobile Tester (mostly command errors).
Depending of the setting of the event status register mask, bits set in the event status register may be transferred to
bit 5 of the service register.
For further details regarding the event status register, please refer to section
’The event status register’ on page 49
General operation register group
This group of registers is 16 bits wide and reflects the general operation status of the 2201R.