HP Car 3490A LOW, may be, _ i - l, Hold line, SectionIII, Table3-7.ProgramCodes

SectionIII Model34904

Table3-7. ProgramCodes.

C H A R A C T E R

R 1 2 3 4 5 6 7

F

0

a

2

3

s 0

1

2

3

T

o

1

2

3

M

0

I 2

3

4

5

6

7

E

USE

RangeProgramldentifier 10,00Okf); Test7

1,000 kQ; l OOOV; Test 6

100kO; 1OOV; Test5

10 kQ; 10 V; Test4

1 kS2;1 V; Test 3

.1 kO; .t V; Test2

Autorange;Test 1

FunctionProgramldentifier

DC Volts

KOhms AC Volts Test

Sample/Hold Program ldentifier Sample/Hold Off Sample/Hold Off Track/Hold

Acquire/Hold

Trigger Source Program ldentifier Internal Samole Rate * lmmediate Internal

Next External Trigger None

Mode of Operation Program ldentifier Addressed Multi with No Output Addressed Multi with Output Addressed Single with No Output Addresed Single with Output lnterrupt Multi with No Output Interrupt Multi with Output

Interrupt Single with No Output .'-'Interrupt Singlewith Output

Execute Mode of Operation Program

OCTAL			BINARYCODE
CODE b 1		b6	b 5	ba	b3		b2	b 1
1 2 2	1	0	1	0	0		1	0
061	0	1	1	0	0	0	'	l
062	0	1	1	0	0		1	0
063	0	1	1	0	0		1	1
og	0	1	1	0	1		0	0
065	0	1	1	0	1		0	1
066	0	1	1	0	1		1	0
067	0	1	1	0	1		1	1
106	1	0		0	1		1	0
060	0	1		0	0		0	0
061	0	1		0	0		0	1
62	0	1		0	o		1	0
063	0	1		0	0		1	1
123	1	o	1	0	0		I
060	0	1	1	o	0		0	0
061	0	,	1	0	0			1
62	0	1	1	0	0		1	0
063	0	I	1	0	0		a	1
124	1	0	1	0	1		0	0
060	0	1	1	0	0		0	0
061	0	l	t	o	0		0	1
062	0	1	1	0	0		1	0
063	o	1	1	0	0		1	1
1 1 5	I	0	0	1	1		0	I
o60	0	1	1	0	0		0	o
061	0	1	1	o	0		0	1
062	0	1	1	0	o		I	0
063	0	1	1	0	0		1	1
0il	0	1	1	o	1		0	0
065	0	1	1	0	1		0	a
.i066	0	1	1	0	1		I	o
067	o	1	1	0	1		1	I
105	1	0	0	0			0	I

* lf Internal Sample Rate is programmed, make sure front panel Sample Rate control is set to desired position.

until the manual pushbutton is pushed, an external trigger occurs,or the front panelcontrol is takenout of hold.

3-111. T1, lmmediateInternal.The 3490A neverre- leasesthe Hold line, but insteadprovidesan External Encodecommandwhen readyfor a new measurementto begin.It is, therefore,samplingat its madmum rate,and the front panelSampleRatecontrol is bypassed.

3-112.T2, Next ExternalTrigger.The 3490Akeepsthe Hold line LOW andreleasesthe Sample/HoldInhibit line when ready to acceptthe next trigger.Whenan external tngger occurs,the GPIB I/O issuesthe ExternalEncode command. Pushing the front panel manual trigger pushbuttonwill alsoinitiate a reading.

3-113.T3, None.The 3490A keepstheHoldlineLOW and checksfor an output request.This method may be usedto storedatafor output at a latertime.

_ i - l 0

3-114. Mode of Operation. The following paragraphs explainthe mode of operationcodesshownin Table3-7.

3-115..M0,AddressedMultiplewith No Output. In this mode, operation is similar to operation when in local control and not addressedto talk. Readingsare taken according to the programmedtrigger, but no output occurs.

3-116.M1, AddressedMultiplewith Outpüt. The instrument will take a readingwhen triggeredand output the readingif addressedto talk. Ifnot addressedto talk, it will wait for its talk addressto output dataor its listen addressto be programmed.After output of the data or receiptof new programmingdata, the GPIB I/O returns to the beginningof the programto determinethe trigger for the next reading.

3-117. M2, AddressedSingle with No Output. The instrument takes one readingwhen triggeredand does