Chapter 8
SCPI
The communication-related subsystems
348
4460 GSM System Option and 4468 EDGE System Option
Version 12.20
If both bit 6 of the service register mask and bit 6 (the summary status bit) of the
service register are set, then a service request (SRQ) is executed.
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 4400.
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 4400 (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 the
appendix (SCPI Command Reference).
General operation register group
This group of registers is 16 bits wide and reflects the general operation status
of the 4400.
Some of the bits of this register (like bits 8 and 9) are summary bits. Those
summary bits are result bits of subordinate groups of registers as described
below.
NOTE
The commands related to the general operation register group and its subor-
dinate groups of registers all start with
:STATus:OPERation:
.
Bit
Decimal
Meaning
0
1
Set during calibration.
1
2
Set while settling.
2
4
Set while ranging.
3
8
Set while sweeping.
4
16
Set as long as any measurement is being carried
through.
5
32
Set while the 4400 waits for a trigger.
6
64
Set while the 4400 waits for an arm.
7
128
Set while a correction process is in progress.
8
256
This is the SIGNaling summary bit. This is the
Result bit of the signaling operation register group
(see below for details).
9
512
This is the MEASure summary bit. This is the Result
bit of the measuring operation register group (see
below for details).
