Boonton 4541, Инструкция по эксплуатации

Страница: 145 / 262

Boonton 4540 Series RF Power Meter
Remote Operation
5-11
5.6.2 CALCulate Subsystem
The CALCulate group of the command subsystem is used to configure post acquisition data processing. Functions in the
CALCulate subsystem are used to configure the measurement mode and control which portions of the acquired measurement
data is used and how it is processed to yield a finished measurement. In addition to measurement mode, CALCulate is used
to define mathematical operations, measurement units, and limit monitoring. The numeric suffix of the CALCulate program
mnemonic in the CALCulate commands refers to a processing and display ―channe
l‖,
that is CALCulate1 and CALCulate2
represent the power meter’s Channel 1 and Channel 2 functions. The CALCulate commands generally DO NOT affect the
data acquisition portion of the measurement (see the SENSe subsystem, Section 5.5.12 ). In a signal-flow block diagram, the
CALCulate block operations will follow those of the SENSe block. Note that CALCulate2 commands will generate an error
if used with a single channel Model 4541.
CALCulate:LIMit:CLEar[:IMMediate]
Description: Clear all latched alarms for the selected channel.
Syntax: CALCulate[1|2]:CLEar[:IMMediate]
Argument: None
Valid Modes: Any
CALCulate:LIMit:FAIL?
Description: Returns the status of all limit alarms for the specified channel in five flags. The first flag is the
logical sum of the remaining four. They are: low-limit active, high-limit active, low-limit latched
and high-limit latched. Active means that the limit is exceeded when the command is executed;
Latched means that the limit has been exceeded since the last limit clear command.
Syntax: CALCulate[1|2]:LIMit:FAIL? <Boolean1>, … <Boolean5>
Returns: <Boolean1> = summary, <Boolean2> = low-limit active, <Boolean3> = high limit active,
<Boolean4> = low-limit latched, <Boolean5> = high-limit latched
Valid Modes: Any
CALCulate:LIMit:LOWer[:POWer]
Description: Set or return the lower limit power level for the selected channel. This limit is used for level
alarms. When the measured average power is below the lower limit, a down arrow ▼ will appear
on the display above the units on the main text screen, and flag bits are set in the alarm register
which may be accessed using CALCulate:LIMit:FAIL? query and CALCulate:LIMit:CLEAR
commands.
Syntax: CALCulate[1|2]:LIMit:LOWer[:POWer] <numeric_value>
Argument: <numeric_value> = -300.00 to +300.00 dBm
Valid Modes: Any