HP 8530A, Руководство по эксплуатации и программированию, Страница: 357 / 439

Programming Examples
follow the PA instruction; each number must be separated from the previous
number by a comma. 0 x 5377; 0 y 4095.
PR x1,y1 Plot Relative vector . Move the pen from the current location to the
relative position specied by the following x,y pair . Any number of x,y pairs
may follow the PR instruction; each number must be separated from the
previous number by a comma. 0 x 5377; 0 y 4095.
PD P en Down. When followed by a PA or PR instruction, this instruction will cause
a visible vector to be drawn to the new location.
PU P en Up . When followed by a PA or PR instruction, this instruction will cause a
blank vector to be drawn to the new location.
LB ASCII character Label T ext. The ASCII characters following the LB command
are drawn on the display beginning in the character cell at the current vector
position. The string must be terminated with the end-of-text character ,
CNTRL C.
DF Set to Default state (PU , PA ).
SPn Select P en (Color), 1 to 5 in the same sequence as shown in the set pen number
menu (see 4 COPY 5 ).
Summary of User Display Instructions
The following instructions control whether the standard measurement display (graticule , labels ,
etc .) and the User Display are on or o.
KP Turn o User Display . Memory contents are not changed.
RP Turn on User Display . Memory contents are not changed.
PG Clear (Erase) User Display Memory .
CS Turn o measurement display (standard graticule , trace , and labels). User
display is not aected.
RS Turn on measurement display . User display is not changed.
Example 15: Redene P arameter
This example demonstrates the receiver's ability to redene a parameter's numerator and
denominator . The rst part denes all four parameters the same , and then uses a four
parameter display to show the dened parameter in four dierent formats . This set-up is saved
in Instrument State 5 and may be recalled manually by the user . Next, after a User Preset, data
from the sum and dierence outputs of a typical monopulse antenna is loaded into P arameters
1 and 2. These parameters are then re-labeled, the display is titled and presented using a two
parameter overlay display . This set-up is saved in Instrument State 6.
Example 16: Read and Output Caution/T ell Message
This example prints the number and message of any error or warning shown on the receiver
display . The user is rst prompted to \A djust" the receiver to force an error to be displayed. T o
get an error message , perform any of the following:
Press the 4 = Ma rk er 5 key with no function active .
P erform a disc directory (press 4 DISC 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DIRECTORY ) without a disc in the drive .
Turn Calibration ON, but select an empty cal register .
18-28 HP-IB Programming