Boonton 4240 RF Power Meter - Manual (Page 65)

Boonton 4240 Series RF Power Meter
5.4 Basic Measurement Information
e easiest a
sequence which includes a
MEAS1:POWER
MEAS1:VOLTAGE? To return the average voltage of channel 1.
or finer control er t me ngs are
r the READ[ ]? command for fresh data.
condition
ode, which has fol ng
-1 eas en alue retu
0 rro rn. ent is not valid.
1 Normal return. No error.
An Unde ondition exists.
er
ith the INITiate:CONTinuous OFF condition, a single measurement cycle is started by use of the
[:IMMEDIATE] command, where bracketed commands are optional. Multiple triggered measurement cycles are
enabled by INITiate:CONTinuous ON.
a m ar event or group of events have occurred in the instrument.
ervice requests are controlled by the Status Byte Register and the Service Request Enable Register. The Service Request
nable Register is a bit mask that determines which summary bits of the Status Byte Register can cause a request for service
t to the Controller. The summary bits of the Status Byte are the MAV, or Message Available bit, and three bits from
iven registers. The rst of these is the Standard Event Status Register. The bits of this register are set and latched by
the
tatus R e Q
but have the additional ca
bits are not only selected
transition, can be specified
he Stat read by B? command. The bit enable mask is set by the *SRE command and read by the *SRE?
er is read by the *ESR? Command and the bit enable mask is set by the *ESE
command or read by the *ESE? Command.
The Operation Status Register is read by the STATus:OPERation:CONDition? command. The transition masks are set by
the STATus:OPERation: Transition and STATus:OPERation:PTransition commands. The bit enable mask is set by the
:OPERation:ENABle command and read by the STATus:OPERation:ENABle? query. The Operation Event
is read by the ST EVENt? query.
he Que t S
descriptions that follow fo
Th way to obtain reading is by use of the MEASure command. This command initiates one complete measurement
default configuration. Examples are:
? To return the average power of channel 1, or
F ov he asurement, individual configuration and function commands should be used. Readi
obtained using the FETCh[ ]? command for current data o
R fund en nits as set by the CALCulate[1|2]:UNIT command. Each reading is preceded by a eadings are in am tal u
c the lowi meaning:
M urem t is STOPPED. V rned is not updated.
E r retu Measurem
2 r-range c
3 An Ov -range condition exists.
W
INITiate
5.4.1 Service Request
quests provide eans to signal the host that a particul Service re
S
E
to be sen
event dr
fi
in specific events within strument and cleared when the register is read. The remaining two registers are the Operation
S egister and th uestionable Status Register. These two registers are similar to the Standard Event Status Register
pability to detect changes in the individual bits of the associated register’s condition register. The
by a mask register, but a change in a selected bit, either a high to low, low to high or either
by transition mask registers.
T us Byte is the *ST
query. The Standard Event Status Regist
N
STATus
Register
ATus:OPERation:
T stionable Even tatus Register has the same structure as the Operation Status Register. Refer to the command
r detailed information.
Remote Operation
5-5