Agilent Technologies 4285A Manual do Utilizador descarregar pdf (Página 11)

7. From Table 1-1, the actual accuracy equation to

be applied is determined as A

Then,

8. Determine N

from Table 1-2.

From frequency = 25.2 MHz, then, N

= 0.3.

9. Then,

10. Cable length is 0 m, then A

= 0.

11. Operating temperature is 28 °C, then K

= 1

(from Figure 1-5).

12. Therefore, inductance measurement accuracy

is:

= ±(A

+ A

)  K

= ±(2.6 + 0)  1

= ±2.6 [%]

Determine Q measurement accuracy Q

1. From Q Accuracy (see page 6), Q measurement

accuracy Q

is determined as below:

= ±

 D

1 Q

 D

2. Determine D accuracy D

for calculating Qe.

From the previous step Determine inductance

measurement accuracy A

(see page 10), Ae is

2.6 [%], then:

= ±

100

= ± 0.026

3. Therefore Q

is:

= ±

 D

1 Q

 D

= ±

 0.026

1 30  0.026

≈ +106/–13

Correction Functions

Zero open

Eliminates measurement errors due to parasitic

stray admittance (C, G) of the test fixture.

Zero short

Eliminates measurement errors due to parasitic

residual impedances (L, R) of the test fixture.

Load

Improves the measurement accuracy by using a

device whose value is accurately known (a working

standard) as a reference.

List Sweep

A maximum of ten frequencies or test signal levels

can be programmed. Single or sequential tests can

be performed. When Option 4285A-001 is installed,

DC bias voltages can also be programmed.

Comparator Function

Ten-bin sorting for the primary measurement

parameter, and IN/OUT decision output for the

secondary measurement parameter.

Sorting modes

Sequential mode. Sorting into unnested bins with

absolute upper and lower limits.

Tolerance mode. Sorting into nested bins with

absolute or percent limits.

Bin count

0 to 999999

List sweep comparator

HIGH/IN/LOW decision output for each point in

the list sweep table.

= 0.3% + (

≈ 2.6 [%]

)

3% + [0.02% + ()

0.1%]

25.2

|35|

% + ( )

3% + [0.02% + ()

0.1%]

osc

SgLabs

www.sglabs.it

email: [email protected]

tel. +39 0755149360

SgLabs

www.sglabs.it

email: [email protected]

tel. +39 0755149360

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