Racal Instruments 3155 Spezifikationen PDF herunterladen (Seite 171)

User Manual 3155

Programming Reference 4-60

nary block. 2002 is not a multiple of 4, therefore the generator generates an er-

ror message if this segment length is used.

TRACe:DELete<segment_number>

Purpose

This command deletes a segment. The memory space being freed is available for new waveforms as long as

the new waveform is equal to or smaller in size then the deleted segment. If the deleted segment is the last

segment, then the size of another waveform written to the same segment is not limited. For example, let

consider two segments, the first being a 1000-point waveform and the second with 100 points. If you delete

segment 1, you can reprogram another waveform to segment 1 with size to 1000 points. If you reprogram

segment 1 with 1004 points, the instrument generates an error and does not accept this waveform. On the

other hand, if you delete segment 2, which was the last segment you programmed, then you can reprogram

this segment with waveforms having length limited only by the size of the entire memory space.

• <segment_number> selects the segment number that is deleted

TRACe:DELete<segment_number>

Purpose

This command deletes all segments and clears the entire waveform memory. This command is particularly

important in case you want to de-fragment the entire waveform memory and start building your waveform

segments from scratch.

TIP

The TRAC:DEL:ALL command does not re-write the memory so, whatever waveforms

were downloaded to the memory are still there for recovery. The TRAC:DEL:ALL com-

mand removes all stop bits and clears the segment table. You can recover memory

segments by using the TRAC:DEF command. You can also use this technique to

resize, or combine waveform segments.

TRACe:SELect<segment_number>

Purpose

This command selects the active waveform segment for the output. By selecting the active segment you are

performing two functions:

1. Successive :TRAC commands affects the selected segment

2. The SYNC output is assigned to the selected segment. This behavior is especially important for se-

quence operation, where multiple segments form a large sequence. In this case, you can synchronize

external devices exactly to the segment of interest

• <segment_number> sets the active waveform segment number

Parameter type

Numeric (integer only)

Parameter range

<segment_number> 1 to 4096

TRACe:SELect?

Response

The 3155 returns the active segment number.

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Racal Instruments 3155 Spezifikationen Seite 171