5965-4792.pdf - 第24页

U p to 1 20 MHz ( 4- T ermi nal Pai r ): DC Bi as A cces sori e s 1 6 0 65C 40 Vd c ex ternal volt age bia s adap ter T erminal connector : 4- T er minal P air , BNC E x tern al bias i nput co nnec tor : BNC (f ) Dimensi…

42941A Impedance probe kit

Terminal connector: 4-Terminal pair, BNC

Cable length (approx.): 1.5 m

Weight (approx.): 2400 g

Basic measurement accuracy: ±1%

For detailed information, refer to the

operation manual or the specifications of

E4990A-120.

Up to 120 MHz (4-Terminal Pair): Probes

Description: This impedance probe kit is designed for use with the E4990A-120. It

provides the capability to perform in-circuit measurements (printed circuit patterns,

the input/output impedance of circuits, etc.) with better accuracy and wider impedance

coverage from 20 Hz to 120 MHz. DUTs can be connected by either using the pin probe,

the clip lead (alligator clip adapter) or the BNC adapter. All probe adapter can be used

from 20 Hz to 120 MHz. The pin probe is best for in-circuit, board-mounted compo-

nents, The clip lead is for components too large for the pin probe. The BNC adapter is

used to connect circuits or networks equipped with BNC connectors.

Applicable instrument: E4990A-120

Frequency: 20 Hz to 120 MHz

Maximum voltage: ±42 V peak max. (AC+DC)

Operating temperature: –20 to +75°C (probe only)

Furnished accessories:

Compensation and measurement: Adapter setup and compensation is required before

measurement. In the Adapter setup menu, select PROBE 42941A. Use the furnished

3.5 mm short and load standards. The open condition can be created by not connecting

the probe to anything. Perform phase compensation, short and load data measure-

ments. For compensation, open and short compensation is recommended. Short

compensation is performed by shorting the probe. To short the probe it is recommended

to use a shorting device with gold-plated surfacing (which provides stable contact

resistance).

E4990A-120 with 42941A

In-circuit measurement

Open compensation

Short compensation

Description P/N Qty.

Pin probe 42941-60002 1

Adapter BNC-SMA

1250-2375 1

Spare pin Set (3 ea.) 42941-60004 1

3.5 mm SHORT 1250-2840 1

3.5 mm LOAD 0955-1105 1

Clip lead 8121-0003 1

Ground lead 04193-61679 1

Carrying case 42941-60011 1

Operating and service manual 42941-90010 1

20 | Keysight | Accessories Catalog for Impedance Measurements - Catalog

Up to 120 MHz (4-Terminal Pair): DC Bias Accessories

16065C 40 Vdc external

voltage bias adapter

Terminal connector: 4-Terminal Pair, BNC

External bias input connector: BNC(f)

Dimensions (

approx.): 160 (W) x 50 (H) x 150 (D) [mm]

Cable length (approx.): 210 mm

Weight (approx.): 450 g

LCR meter with 16065C

Description: This test fixture makes it possible to measure a DUT with up to ±200

V DC bias. The same modules of 16047A can be used to allow measurements of

axial/radial lead components.

Applicable instruments: E4980A/AL, E4981A, E4990A

Frequency: 50 Hz to 2 MHz

Maximum DC bias: ±200 V DC max. /15 V peak AC max.

Blocking capacitor of 5.6 µF is connected in with the Hc terminal.

Operating temperature: 0 to 55°C

DUT Size: See the 16047A figure with module sizes.

Furnished accessories:

Compensation and measurement: Open, short and load compensations are recom-

mended before measurement. Short compensation is performed by shorting the

contacts of the test fixture with a shorting plate as described for the 16047A. Load

compensation is performed by inserting a known standard device. After performing

open, short and load compensations, the DUT is connected to the test fixture.

Description: This adapter is designed to operate specifically with the E4981A

and the E4980AL. By connecting an external DC voltage source to this adapter, a

bias voltage of up to ±40 V can be supplied to a DUT. The DUT can be inserted by

connecting any direct attachment 4-Terminal Pair test fixture to the adapter.

Applicable instruments: E4981A and E4980AL

Frequency: 100 Hz to 1 MHz

Maximum DC bias: ±42 V peak max. (AC+DC)

Blocking Capacitor of 100 µF is connected in series with the Hc terminal.

Operating temperature: 0 to 55°C

Applicable fixtures: 16034E/G/H, 16047A/E, 16048A/D, 16089A/B/C

Furnished accessories:

Compensation and measurement: Open and short compensations are recom-

mended before measurement. Short compensation is performed by shorting

the contacts of the test fixture that is in use. After performing open and short

compensations, the DUT is connected to the test fixture.

Description P/N Qty.

Module for axial lead 16061-70022 1

Module for radial lead mounting on fixture 16061-70021 1

Module for short radial lead 16047-65001 1

Shorting bar 16047-00640 1

Operating and service manual 16065-90011 1

Description P/N Qty.

Operating and service manual 16065-90020 1

16065A 200 Vdc external voltage

bias fixture

Terminal connector: 4-Terminal Pair, BNC

DUT connection: 4-Terminal

External bias input connector: High Voltage BNC(f)

Dimensions

(approx.): 180 (W) x 120 (H) x 200 (D) [mm]

Cable length (approx.): 40 cm

Weight (approx.): 1500 g

High Voltage BNC(f) connector for external bias input

BNC(f) connector for voltage monitor output

LCR meter with 16065A

21 | Keysight | Accessories Catalog for Impedance Measurements - Catalog

16451B Dielectric test fixture

Terminal connector: 4-Terminal pair, BNC

Dimension (approx.): See page 26

Cable length (approx.):

0.8 m(from connector to electrodes)

Weight (approx.): 3700 g

Measurement accuracy

(supplemental performance characteristics):

f: measured frequency [Hz] f ≤ 30 MHz

ε�

: measured permittivity

tan δ: measured dissipation factor

: permittivity of air 8.854 × 10

-12

[F/m]

d: diameter of electrode {A,B}

t: thickness of material [mm]

Az: Impedance measurement error of instrument

Ad: D measurement error of instrument

The material is assumed to be ideally flat.

The above equation is applicable for electrodes A

and B when using the contacting electrode method.

Up to 120 MHz (4-Terminal Pair): Material

Description: The 16451B is used to evaluate the dielectric constant of solid

dielectric materials accurately, and complies with ASTM D150. The 16451B

employs the parallel plate method, which sandwiches the material between two

electrodes to form a capacitor. LCR meter or an Impedance Analyzer is then

used to measure the capacitance created from the fixture. A measurement block

diagram of the parallel plate method is shown below:

Notice the stray capacitance, which is formed on the test material as shown in

the figure above. The guard electrode helps to eliminate the stray capacitance

at the edge of the electrode.

Basic measurement accuracy (including the E4990A):

Parallel plate method

Typical Permittivity (εr�) Measurement Accuracy:

E4990A with 16451B

Typical Loss Tangent (tan δ) Measurement Accuracy:

accuracy ()

∆

Z +

0.04 f

0 +

100 (

–

(

–

)

0.01

[%]

Ea = 0.005 + 0.0004 f

100

tan δ

∆

tan δ < 0.1:

ε* Loss Tangent Accuracy (∆ tan δ)

tan δ < 0.1 : Ad + Ea + Eb

E4990A Measurement settings;

1. Osc level : 500 mV

2. Meas Time: 5 Precise

3. Adapter setup : 1 m

4. Compensation : Open, short and load

22 | Keysight | Accessories Catalog for Impedance Measurements - Catalog