Boonton 4530 Peak Power Meter User Manual Instrukcja Użytkownika Pobierz pdf (Strona 113)

4-39

Boonton Electronics Chapter 4

4530 Series RF Power Meter Remote Operation

4.5.13 SENSe:SBUF Data Array Commands

The SBUF commands (which are grouped under the SENSe subsystem) are used to control data capture and output of

a long array of sequential measurement samples (the “Sample BUFfer”). This capability is useful for capturing very

long, single, triggered events in the time domain. These commands are used in PULSE mode, and allow control of data

sampling and array output. Up to 12,000 points may be captured at programmable rates up to 2.5 million power readings

per second for importing long baseline measurements into a database on the host.

SENSe:SBUF:MODE

Description: Set or return the on/off state of “user” sampling mode. When user mode is active (ON), the

timespan and trigger delay settings are overridden, and user programmed parameters are

used to configure sample rate, buffer size, and trigger position. Note that user mode is only

for outputting long measurement arrays, and that marker and automatic measurements are

not active in this mode. Setting to OFF restores normal operation.

Syntax: SENSe:SBUF:MODE <asc>

Argument: <asc> = OFF, ON

Valid Modes: Pulse mode only

SENSe:SBUF:PERiod

Description: Set or return the sampling period in internal, 80ns counts for “user” sampling mode. Sample

rate = (12.5 / n) MHz.

Syntax: SENSe:SBUF:PERiod <n>

Argument: <n> = 5 to 12500 (equivalent to 2.5 MSa/sec to 1.0 KSa/sec)

Valid Modes: Pulse mode only, SENSe:SBUF:MODE must be ON.

SENSe:SBUF:PREsamp

Description: Set or return the number of pretrigger samples: points which are gathered for each sweep

before arming the trigger in “user” sampling mode. When the array is read, these points will

appear with a negative INDEX.

Syntax: SENSe:SBUF:PREsamp <n>

Argument: <n> = 0 to 12000 (see restrictions)

Valid Modes: Pulse mode only, SENSe:SBUF:MODE must be ON.

Restrictions: PREsamp + POSTsamp must be less than 12,000

SENSe:SBUF:POSTsamp

Description: Set or return the number of posttrigger samples: points which are gathered for each sweep

after the trigger has been armed and a valid edge has been received. When the array is read,

these points will appear with a negative INDEX.

Syntax: SENSe:SBUF:POSTsamp <n>

Argument: <n> = 0 to 12000 (see restrictions)

Valid Modes: Pulse mode only, SENSe:SBUF:MODE must be ON.

Restrictions: PREsamp + POSTsamp must be less than 12,000

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 169 170

Brak uwag

Boonton 4530 Peak Power Meter User Manual Instrukcja Użytkownika Strona 113