Agilent Technologies 4294A Service Manual download pdf (Page 87)

Chapter 6 87

Reading/Writing Measurement Data

Reading/Writing Data

6. Reading/Writing

2. Chapter Title 3. Chapter Title

4. Chapter Title

5. Chapter Title

Measurement Data

Reading level monitoring results

To read monitoring results of oscillator (OSC) power and dc bias levels, you need to use

the following commands to turn ON the level monitor function before starting

measurements:

• “OMON” on page 365

• “BMON” on page 272

Use the following commands to read the level monitoring results:

• “OUTPVAC?” on page 394

• “OUTPVACP?” on page 395

• “OUTPIAC?” on page 380

• “OUTPIACP?” on page 381

• “OUTPDC?” on page 376

• “OUTPDCP?” on page 376

Example 6-3 shows a sample program to read the level monitoring results. This program is

available under the filename of “lvl_mon.bas” on the sample program disk.

This program specifies the oscillator power and dc bias levels, turns ON the level monitor

function, performs a sweep once, and reads and displays the level monitoring results.

Lines 50 to 110 Identifies the external controller and Instrument BASIC and sets the

GPIB address.

Lines 130 to 170 Substitutes the selected signal source output mode, the signal source

output level, the dc bias level, the dc bias range, and the selected dc

bias monitor function into the corresponding variables Osc_mode$,

Osc_pow, Dc_bias, Dc_b_rng$, and Mon_bias$, respectively.

Lines 190 to 220 Resets the Agilent 4294A and then sets the sweep start point, the

sweep stop point, and the number of measurement points to 10 MHz,

20 MHz, and 11, respectively.

Lines 230 to 270 Sets the signal source output mode, the signal source output level, the

dc bias level, and the dc bias range to Osc_mode$, Osc_pow, Dc_bias

and Dc_b_rng$, respectively.

Lines 280 to 300 Turns ON the dc bias output and the signal source output level monitor

function and sets the selected dc bias monitor function to Mon_bias$.

Lines 320 to 340 Performs sweep once and waits for the sweep to be completed.

Line 360 Specifies the IEEE 64-bit floating point format as data transfer format.

Lines 380 to 410 Reads the signal source voltage level found by monitoring and stores it

in “Mon_osc_v(*).”

Lines 430 to 460 Reads the signal source current level found by monitoring and stores it

in “Mon_osc_i(*).”

Lines 480 to 510 Reads the DC bias level found by monitoring and stores it in

“Mon_bias(*).”

Lines 530 to 560 Reads the sweep parameter array and stores it in “Swp_prm(*).”

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Agilent Technologies 4294A Service Manual Page 87

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