Agilent Technologies 4294A, Programming Manual

Page: 87 / 518

Chapter 6 87
Reading/Writing Measurement Data
Reading/Writing Data
6. Reading/W
riting
2
. Cha
p
te
r T
itle
3
. Chap
te
r T
itle
4
. Chap
te
r T
itle
5. Chap
te
r T
itle
Me
asur
eme
n
t Da
ta
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(*).”