LCX_UserManual_en_08_1.pdf - 第33页

Getting started R&S ® LCX Series 33 User Manual 1 179.2260.02 ─ 08 Power supply connector for connecting the R&S LCX to the mains., see Sec- tion 4.1.6, "Connecting to power" , on page 21. Ground termin…

Getting started

R&S

LCX Series

32User Manual 1179.2260.02 ─ 08

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Figure 4-6: R&S

LCX rear panel

1 = IEEE-488 interface, see "IEC 625/IEEE 488" on page 32

2 = Kensington lock, see "Kensington lock" on page 32

3 = AC power connector and power switch, see "AC power supply" on page 32

4 = Ground terminal, see "Ground terminal" on page 33

5 = D-sub connector, see "Digital I/O" on page 33

6 = Bias connectors and fuse holder, see "External Voltage Bias" on page 33, "BIAS Fuse" on page 33

7 = Trigger input connector, see "Trigger Input" on page 33

8 = USB host connector, see "USB A" on page 31

9 = USB device connector, see "USB B" on page 33

10 = Ethernet (LAN) interface connector, see "LAN" on page 33

IEC 625/IEEE 488

Option: R&S NG-B105

General purpose interface bus (GPIB): interface to connect a computer for remote con-

trol of the R&S LCX.

See "Establishing the GPIB remote control connection" on page 168.

Kensington lock

Flat key security slot to prevent the instrument from removal.

The locking system consists of a small, metal-reinforced hole with a metal anchor and

a rubberized metal cable that is secured with a key lock. The loop at the end of the

cable allows you to tie the unit to a fixed object.

AC power supply

Mains power supply with power switch, fuse holder and IEC socket.

●

Mains power switch:

Switch for connecting and disconnecting the internal power supply from the power

source, see Section 4.1.10, "Switching on or off", on page 27.

●

Fuse holder

Socket for the fuse securing the line voltage. Depending on the power supply sys-

tem, the corresponding fuse must be plugged before connecting to power. See

"Connecting to power" on page 23.

●

IEC socket

Instrument tour

Getting started

R&S

LCX Series

33User Manual 1179.2260.02 ─ 08

Power supply connector for connecting the R&S LCX to the mains., see Sec-

tion 4.1.6, "Connecting to power", on page 21.

Ground terminal

Protective ground terminal to secure the R&S LCX, e.g. with a grounded external con-

ductor, see Table 1-1.

Digital I/O

15-pole D-Sub socket to connect the binning interface.

External Voltage Bias

4 mm safety sockets for external bias voltage.

Note: External BIAS requires a constant voltage.

Before applying the voltage, make sure that you have set the constant voltage mode in

the supplying instrument. Refer to the user manual of the power supply.

The External Voltage Bias socket is not directly connected to the ground.

Indirectly, there is a connection to ground with low impedance over the "H CUR" output

buffer.

When the bias voltage is turned on, the potential to ground deviates only by a maxi-

mum of ±18 V. Without external bias, make sure that the voltage at the two sockets

does not exceed the safety extra-low voltage or the specified 40 V DC.

BIAS Fuse

Socket for the fuse securing the external bias voltage.

Trigger Input

BNC socket for external trigger signal.

The outer conductor of the trigger input is directly connected to the mains safety

ground by the line cord.

USB A

Female USB (universal serial bus) connector of type A (host USB). You can connect a

USB memory stick, e.g., to record and export measurement data, to capture screen-

shots, or to update the firmware.

How to: Section 4.1, "Preparing for use", on page 18

USB B

Female USB (universal serial bus) type B connector. This interface provides remote

control of the instrument from a controller PC.

See "Establishing a USB remote control connection" on page 168.

LAN

RJ-45 socket to connect the R&S LCX to a LAN for remote control, remote operation,

and data transfer.

How to: Section 4.1.7, "Connecting to LAN", on page 24

Instrument tour

Getting started

R&S

LCX Series

34User Manual 1179.2260.02 ─ 08

4.3 Trying out the instrument

As a brief introduction, the following example describes the basic steps to be taken

when setting up a measurement. The instructions guide you through the measurement

of a resistor.

Further test setups and measurement methods are described in the user manual, see

Section 6, "Measurement setups", on page 53.

The test setup uses the R&S LCX-Z3 SMD test fixture connected to the R&S LCX for

measuring leadless components.

If necessary, you can connect the R&S LCX-Z11 BNC-to-BNC extension between the

R&S LCX and the test fixture, e.g., to make it easier to pick and place the DUTs.

Basic measurement steps

The R&S LCX LCR meter measures the impedance and phase angle with an AC sig-

nal, and derives the required characteristics.

As the equivalent circuit of each DUT contains capacitive, real and conductive parts,

the characteristics of passive components vary dependent on frequency, level, temper-

ature and additional bias. Even the test equipment can impact the measurement

results. Therefore, we recommend that you use the test fixture that fits best for your

application, and align the instrument on all frequencies. Keep the order as given to

minimize parasitic parts and thus to optimize the measurement accuracy.

1. Select the test fixture that fits best for your application.

2. After power-on set the R&S LCX to an initial state, see "Setting the initial state"

on page 34.

3. Connect the test fixture, see Section 4.1.9, "Connecting a test fixture", on page 25.

4. Configure the test signal, see "Setting up the test signal" on page 35.

5. Align the instrument on all frequencies, see "Aligning the instrument on all frequen-

cies" on page 36.

6. Start a resistor measurement "Measuring a resistor" on page 36.

Setting the initial state

NOTICE! Check all terminals to make sure that they are not damaged.

Power on the R&S LCX as described in Section 4.1.6, "Connecting to power",

on page 21.

2. Switch on the R&S LCX, see Section 4.1.10, "Switching on or off", on page 27.

NOTICE! Risk of measurement inaccuracy. Measurements can be inaccurate, if

performed when the instrument is not warmed-up. Wait until the instrument has

reached its operating temperature before you start the measurement procedure.

The warm-up time is up to 30 minutes.

To start from an initial state, set the instrument to default:

Trying out the instrument