SectionIII

STORE

Endscalculatorprogram.

To run this program,press

Model 3490A

3-135. Suppressionof CR and LF. When outputting programminginstructions from the 9800 seriescalcula- tors without using the CMD statement, the Carriage Return (CR) and Line Feed (LF) normally output by the calculatormust be suppressedIf. not, they are seen as two programmingcharactersby the 3490A. CR and LF may be suppressedin the 9820 by transmitting,Z at the end of the instructions.In the 9830, they may be suppressedby sendinga semicolon.

9820 example:

CMD "?U6";FMT "M3R7FQE",Z;WRT13

To haltprogram,press

 

 

9830example:

 

 

-

sroPl1 0 CMD"?U6''

 

I

20 OUTPUT(13,30)..M3R7F@E";
L-J

 

 

3Q FORMATB

 

 

To list program(print out storedprogram),press

3-136Controlby.MarkedCardProgrammer.

 

 

I E N Dl l L t s r

3-137. The 34gOA with Option 030 maj, be pro-

grammedby using a Marked Card Programmersuchas

\

/

 

 

the -hp-Model 3260A or Model 9860A. An exampleof

 

 

markedcard programmingis shown in Figure 3-10.The

3-134. Special Trigger ProgrammingTechnique.When

binary code shown in Table 3-7 is usedin marking the

programming the 3490A, the E indicates the end of

card. Use a soft black

pencil to mark each space

programming information and allows the 3490A to start

representinga "l" in the code.The "200" spacemust be

operating according to

the new programming instruc-

marked wheneverthe 3490A is

addressedto listen or

tions. The instructions are stored as they are received

clear (unaddressed).

"200"

bit pulls the MRE line

The

 

and do not require the E in order to be accepted.

LOW,and shouldbe usedonly for addressing.

Becauseof this, one programming technique is to omit

3-138.The following instructionsmust be observedfor

the E when the programming instructions are sent, and

then transmit the E when it is desiredthat the 3490A

reliableprogramming.

 

 

make a reading. However, if the E is not sent with the

.j

1. The 3490A cannot receive programming data

programming instructions, the 34904 will take a readin!"

either when MRE goes LOW or when an E is sent,

 

whilö it is making a reading.Therefoie,if tn. :+gOR i,

whicheveroccursfirst. Consequently,if the 3490A was

 

allowtid to sample,programminginstructions from the

progammed with "M3Tl. . . ." initially, and then the

 

card reader will be ignored by the 3490A while it is

statement CMD"?U6","E" was used, the instrument

 

making a reading.Two methodsmay be usedto control

would take two readingsinsteadof one asprogrammed.

 

sampling.

Therearetwo waysto preventthis:

 

a. Before programming, set the 3490A Sample

 

 

a. After sendingthe programminginstructions, d.on,t

 

Rate control to the HOLD position. Do not program

changethe listen and,talk addressesuntil the E is sent.

 

trigger mode. Instead, after programming is com-

For example:

 

pleted, change the Sample Rate control manually

CMD "?U6'""F3R7M3T1''

 

from the HOLD position to the desiredsamplerate.

 

 

Then if a subsequentchangein the 3490A programis

 

 

necessary,the SampieRatecontrol must be setto the

öMD,..E,,,..?5'\P,

 

HOLD position againbefore programming.

 

 

b. First programthe 34904 for no trigger,and then

 

b. Set the 3490A Sample Rate control to the

reprogramit for a triggerwhen a readingis to be made.

 

HOLD position and program the 3490A for trigger

For example:

 

mode T1, Immediate Internal Trigger.In this mode,

CMD "?U6", "F3M3R7T3E',(The E is op-

 

the 3490A will continue to sampleat the maximum

 

rate, and the front panel control settingwill haveno

tional in this statement)

 

 

effect. In order to reprogramthe 34904 under these

 

 

 

 

conditions, the 3490A Une switch shouldbe tumed

c\tD"?u6",.. TlE",, . ?5V"

 

OFF and back ON again.This returnsthe instrument

 

to local (front panel)control.

 

 

-1-ll