Rohde&Schwarz NGMO1, NGMO2 Operating Manual

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Operating Manual

Power Supply NGMO1 and Power Supply NGMO2

192.1500.21 and 192.1500.24

Version 4.00 / 07-2004

Operating Manual

Power Supply NGMO1 and

Power Supply NGMO2

Edition: July 2004

Version: 4.00

All rights reserved, including translation into foreign languages. No part of this manual may be reproduced or reworked using electronic systems, duplicated or distributed in any form (photocopying, microfilm or any other process), not even for instructional purposes, without written permission from ROHDE & SCHWARZ GmbH & Co. KG.

© Disclosure or reproduction of this documentation, utilization and communication of its contents is not permitted, without express approval. Infringements will lead to claims for compensation. All rights reserved in the event of patents being granted or registration of a protected design.

ROHDE & SCHWARZ GmbH & Co. KG Mühldorfstraße 15 D-81671 München Phone: 49 (0)1805 124242 Fax: 49 (0)89 4129-13777 Internet: www.rohde-schwarz.com E-mail: CustomerSupport@rohde-schwarz.com

Printed in the Federal Republic of Germany. Subject to alternations.

Safety Instructions

This unit has been designed and tested in accordance with the EC Certificate of Conformity and has left the manufacturer’s plant in a condition fully complying with safety standards.

To maintain this condition and to ensure safe operation, the user must observe all instructions and warnings given in this operating manual.

Safety-related symbols used on equipment and documentation from R&S:

Observe

operating

instructions

1. The unit may be used only in the operating conditions and positions specified by the manufacturer. Unless otherwise agreed, the following applies to R&S products:

IP degree of protection 2X, Pollution severity 2, overvoltage category 2, altitude max. 2000 m.

The unit may be operated only from AC supply mains fused with max. 16 A.

2. For measurements in circuits with voltages Vrms > 30 V, suitable measures should be taken to avoid any hazards.

(e.g. use of appropriate measuring equipment, fusing, current limiting, electrical separation, insulation).

3. If the unit is to be permanently wired, the PE terminal of the unit must first be connected to the PE conductor on site before any other connections are made. Installation and wiring of the unit should only be performed by qualified technical personnel.

4. For permanently installed units without built-in fuses, circuit breakers or similar protective devices, the supply circuit must be fused such as to provide suitable protection for the users and equipment.

5. Prior to switching on the unit, it must be ensured that the nominal voltage set on the unit matches the nominal voltage of the AC supply network.

Weight

indication for

units >18 kg

PE terminal Ground

terminal

Danger!

Shock

hazard

If a different voltage is to be set, the power fuse of the unit may have to be changed accordingly.

6. Units of protection class I with disconnectible AC supply cable and appliance connector may be operated only from a power socket with grounding contact and with the PE conductor connected.

7. It is not permissible to interrupt the PE conductor intentionally, neither in the incoming cable nor on the unit itself, as this may cause the unit to become electrically hazardous.

Any extension lines or multiple socket outlets used must be checked for compliance with relevant safety standards at regular intervals.

8. If the unit has no power switch for disconnection from the AC supply, the plug of the connecting cable is regarded as the disconnecting device. In such cases it must be ensured that the power plug is easily reachable and accessible at all times (length of connecting cable approx. 2 m). Functional or electronic switches are not suitable for providing disconnection from the AC supply.

If units without power switches are integrated in racks or systems, a disconnecting device must be provided at system level.

Warning! Hot

surfaces

Ground

continued overleaf

Attention!

Electrostatic

sensitive

devices

require

special care

Safety sheet i

Safety Instructions

9. Applicable local or national safety regulations and rules for the prevention of accidents must be observed in all work performed.

Prior to performing any work on the unit or opening the unit, the latter must be disconnected from the supply network.

Any adjustments, replacements of parts, maintenance or repair may be carried out only by authorized R&S technical personnel.

Only original parts may be used for replacing parts relevant to safety (e.g. power switches, power transformers, fuses). A safety test must be performed after each replacement of parts relevant to safety.

(visual inspection, PE conductor test, insulationresistance, leakage-current measurement, function test).

10. Ensure that the connections with information technology equipment comply with IEC950 / EN60950.

12. Equipment returned or sent in for repair must be packed in the original packing or in packing with electrostatic and mechanical protection.

13. Electrostatics via the connectors may damage the equipment. For the safe handling and operation of the equipment, appropriate measures against electrostatics should be implemented.

14. The outside of the instrument is suitably cleaned using a soft, lint-free dust cloth. Never use solvents such as thinners, acetone or similar, as they may damage the front panel labelling or plastic parts.

15. Any additional safety instructions given in this manual are also to be observed.

11. Lithium batteries must not be exposed to high temperatures or fire.

Keep batteries away from children.

If the battery is replaced improperly, there is danger of explosion. Only replace the battery by R&S type (see spare part list).

Lithium batteries are suitable for environmentally friendly disposal or specialized recycling. Dispose of them in appropriate containers only.

Do not short-circuit the battery.

Safety sheet ii

Contents Power Supply NGMO

1 Operator Information 1-1

1.1 Preface 1-1

1.2 NGMO-Versions 1-1

1.2.1 NGMO1 1-2

1.2.2 NGMO2 1-2

1.3 Purpose of the Handbook 1-2

1.4 Explanation of Symbols 1-3

1.5 Inspection 1-4

2 Safety 2-1

2.1 General 2-1

2.2 Safety Instructions 2-1

3 Unit Description 3-1

3.1 Introduction 3-1

3.2 Overview 3-2

3.2.1 Accessories 3-3

3.3 Specifications 3-4

3.4 Function Description 3-7

3.4.1 Communication 3-7

4 Operation 4-1

4.1 Operation Elements 4-1

4.2 Start-Up 4-5

4.2.1 NGMO2 Line Power Connection and Power-up 4-5

4.2.2 Main Functions of the NGMO2 4-5

4.2.3 Menu 4-9

4.3 Test Connections 4-20

4.3.1 Remote Sense 4-20

4.3.2 Local Sense 4-21

4.3.3 Output Impedance 4-21

4.4 Factory Defaults 4-22

Version 4.00 / 07-2004 1

Power Supply NGMO Contents

4.5 Measurements 4-23

4.5.1 Reading back Voltage (V), Current (I), DVM 4-23

4.5.2 Dynamic Measurements 4-23

4.6 Status Structure 4-28

4.6.1 Status Byte and SRQ 4-28

4.6.2 Queues 4-28

5 IEEE Commands 5-1

5-1 IEEE-488.2 common commands and queries 5-1

5-2 FORMAT command summary 5-5

5-3 OUTPut command summary 5-6

5-4 SENSE command summary 5-9

5-5 SOURCE command summary 5-17

5-6 STATUS command summary 5-20

5-7 CONFIG command summary 5-22

5-8 SYSTEM command summary 5-23

5-9 Signal-oriented measurement-command summary 5-28

5-10 Remote calibration command summary 5-30

6 Ordering Information 6-1

2 Version 4.00 / 07-2004

Figures Power Supply NGMO

Figures

Fig. 3-1 NGMO2, Front view 3-2

Fig. 3-2 NGMO2, Rear view 3-3

Fig. 3-3 NGMO2, Pin codes 3-7

Fig. 3-4 Circuit diagram: Mobile phone connected to the NGMO2 3-8

Fig. 4-1 NGMO2, Operation elements on the control panel 4-1

Fig. 4-2 Four-wire sense connection 4-20

Fig. 4-3 Local sense connections 4-21

Fig. 4-4 Sample values 4-24

Fig. 4-5 Pre-trigger and post-trigger acquisition 4-25

Fig. 4-6 Measurement repetition 4-26

Fig. 4-7 Status model structure 4-29

Version 4.00 / 07-2004 3

Power Supply NGMO Tables

4 Version 4.00 / 07-2004

Operator Information Power Supply NGMO

1 Operator Information

1.1 Preface

We are pleased that you have decided to invest in an ROHDE & SCHWARZ Power Supply NGMO.

We would naturally be glad to answer any application questions you may have.

We look forward to a productive partnership.

Your After Sales Team at

GmbH & Co. KG

1.2 NGMO-Versions

NOTE:

The Power Supply is available in different versions.

This Operating Manual contains descriptions for all versions. In chapters with differences in the description of the individual Power Supplies, such differences will be specially emphasized.

The designation NGMO is used wherever the description applies for all versions.

If you use this manual for a NGMO1: Just ignore all descriptions and specifications which belong to the channel B of the power supply. This is also valid for all status structure description and IEEE commands in chapter 4 and chapter 5 of this manual. If you call a remote command for channel B, the IEEE error message 403 (invalid or non existant channel) is returned when calling “system:error?“.

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Power Supply NGMO Operator Information

1.2.1 NGMO1

The Power Supply NGMO1 consists of the following assemblies:

• Keyboard with LC Display

• Processor board

• Analog board for Channel A

• Power supply unit

1.2.2 NGMO2

The NGMO2 is equipped with two analog boards and therefore delivers two separate voltage sources and signal channels. Apart from that the Power Supplies are absolutely identical.

1.3 Purpose of the Handbook

The operating manual contain all the information you will need to use the Power Supply NGMO.

This manual describes

• safe installation and assembly,

• appropriate and safe operation,

of the Power Supply.

Read the operating instructions carefully before you use the Power Supply. The operating instructions contain important information which must be acted on.

Apart from the information in the operating instructions, the statutory safety regulations that apply in the country of use, the relevant technical standards and the regulations concerning the safe and appropriate use of electrical equipment must also be observed.

The operating instructions belong to the unit and must always be available at the place of use of the Power Supply NGMO.

The owner must observe national safety and environmental protection regulations.

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Operator Information Power Supply NGMO

1.4 Explanation of Symbols

The Power Supply NGMO was produced according to the generally accepted regulations governing the technology and current status of science and technology.

However, it is impossible to design hazard-free electrical equipment.

In order to guarantee a sufficient level of safety for personnel working with the Power Supply NGMO, safety regulations must be observed.

Certain sections of the text are highlighted as follows:

ELECTROCUTION HAZARDS!

Observe the relevant safety regulations when operating electrical devices.

Observe the operating instruction.

WARNING!

Failure to follow the instructions could damage the Power Supply NGMO.

ATTENTION!

Failure to follow the instructions may cause spurious results.

NOTE:

Emphasizes significant details, the observance of which is of particular importance and which facilitate operation.

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Power Supply NGMO Operator Information

1.5 Inspection

The Power Supply NGMO2 was carefully inspected electrically and mechanically before shipment. After unpacking the unit from the shipping carton, check for any obvious signs of physical damage that may have occured in transit. Remove any protective film over the screen.

Report any damage to the shipping agent immediately. Save the original packing carton for any future shipments. The following items are included with every order:

• 1 Power Supply NGMO,

• 1 power cable,

• 2 output connectors,

• 1 Operating manual

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Safety Power Supply NGMO

2 Safety

2.1 General

NOTE

Only personnel authorized by ROHDE & SCHWARZ may open the Power Supply NGMO.

If the safety regulations for the Power Supply NGMO are disregarded, ROHDE & SCHWARZ GmbH & Co KG will not assume liability for any resulting damage and all warranties will become null and void.

2.2 Safety Instructions

ELECTROCUTION HAZARDS!

Observe the relevant safety regulations when operating electrical devices.

Observe the operating instruction.

ATTENTION!

Failure to follow the instructions may cause spurious results.

WARNING!

Failure to follow the instructions could damage the Power Supply NGMO.

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Power Supply NGMO Safety

2-2 4.00 / 07-2004

Unit Description Power Supply NGMO

3 Unit Description

3.1 Introduction

The Power Supply NGMO is accommodated in a 1/2-19”, 2 HU (high units) enclosure.

The NGMO is more, than just a power supply for conventional test and measurement equipment, - it is an accurate, multipurpose electronic device with two separate supply and measurement channels (NGMO2 only, NGMO1 only Channel A) which can be used as the following:

• high speed voltage source,

• programmable DC load,

• precise digital multimeter,

• sampling oscilloscope,

This unit fulfils all requirements of latest electronic battery-powered communication products.

The high speed and the high reliability are features which are very important in a production environment.

The NGMO is an ideal device for testing complex high-tech products such as mobile phones. With the NGMO, it is possible to create reproducible and realistic powering conditions.

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Power Supply NGMO Unit Description

3.2 Overview

Fig. 3-1 NGMO2, Front view

1 pushbutton, POWER 2 key 1, CHN, A/B/DVM 3 key 6, OUTP., ON/OFF 4 key 2, U-SET 5 key 7, I-SET 6 key 3, OVP 7 key 8, OCP 8 key 4, SAVE 9 key 9, RECALL 10 key 5, MENU 11 key 0, LOCAL 12 key, SHIFT 13 key, ENTER 14 arrow key, right 15 arrow key, left 16 rotary knob, VARIATION 17 display 18 unit foot

3-2 4.00 / 07-2004

Unit Description Power Supply NGMO

Fig. 3-2 NGMO2, Rear view

1 Channel A Connector 2 Channel B Connector 3 Mains, 120/230 VAC 4 Voltage Selector 5 IEEE488.2 Connector 6 RS485/232 Connector 7 Control I/O Connector

3.2.1 Accessories

• 1 power cable,

• 2 output connectors,

• 1 operating manual

4.00 / 07-2004 3-3

Power Supply NGMO Unit Description

3.3 Specifications

Channel 1 Channel 2

Constant-voltage source

- Voltage setting 0 to 15 V 0 to 15 V

- Resolution 1 mV 1 mV

- Deviation 0.05 % +5 mV 0.05 % +5 mV

•with ±10 % AC supply variation

0.5 mV 0.5 mV

• from 10 to 90 % load change 0.01 % + 3 mV 0.01 % + 3 mV

- Transient recovery time on load change (0.1 A to 1.6 A) to recover within 20 mV

with wide bandwidth

• direct connected <35 µs <35 µs

• at “long” leads, sensed <50 µs <50 µs

with narrow bandwidth

• direct connected <80 µs <80 µs

• at “long” leads, sensed <100 µs <100 µs

- Transient voltage drop on load change (0.1 A to 1.6 A)

with wide bandwidth

• at “long” leads, sensed <60 mV <60 mV

• ripple and noise <1 mV

• output impedance

0 to 1 Ω, settable in 10 mΩ steps

RMS <1 mVRMS

0 to 1 Ω, settable in 10 mΩ steps

• voltage compensation up to 1 V (4 V) per lead up to 1 V (4 V) per lead

Constant-current source

- Peak current (1 ms) 7 A 7 A

- Current setting

• within 1.8 to 5 V 0 to 5 A 0 to 5 A

• outside 1.8 to 5 V 0 to 2.5 A 0 to 2.5 A

• resolution 1 mA 1 mA

3-4 4.00 / 07-2004

Unit Description Power Supply NGMO

• deviation from full scale 10 mA 10 mA

with ±10 % AC supply variation

from 10 to 90 % load change 2.5 mA 2.5 mA

• current sink capability 2.8 A (0 to 5 V) derating up

Voltage measurement

- Range -5 to 25 V -5 to 25 V

• resolution 1 mV 1 mV

• deviation from full scale 0.03 % +3 mV 0.03 % +3 mV

- Measurement time 2 ms to 200 ms settable 2 ms to 200 ms settable

• averaging 1 to 10 values 1 to 10 values

Current measurement

- Ranges 7 A/0.5 A/5 mA 7 A/0.5 A/5 mA

• resolution 200 µA/10 µA/0.1 µA 200 µA/10 µA/0.1 µA

1 mA 1 mA

2.8 A (0 to 5 V) derating up

to 1 A at 15 V

• deviation from full scale 15 mA/1 mA/10 µA 5 mA/1 mA/10 µA

- Measurement time 2 ms to 200 ms settable 2 ms to 200 ms settable

• averaging 1 to 10 values 1 to 10 values

Dynamic measurement

- Sample buffer 1 to 5000 points 1 to 5000 points

- Sample time 10 µs to 1 s in 10 µs steps 10 µs to 1 s in 10 µs steps

- multiple trigger 1 to 100 1 to 100

- Triggering system

• ranges 5 A/0.5 A 5 A/0.5 A

• settable levels

range 5 A 0 A to 7 A in 200 µA steps 0 A to 7 A in 200 µA steps

range 0.5 A 0 mA to 0.5 A in 10 µA

steps

• DVM -5 V to 25 V in 1 mV steps -5 V to 25 V in 1 mV steps

0 mA to 0.5 A in 10 µA steps

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Power Supply NGMO Unit Description

- Analysis of values PEAK, MIN,

HIGH, LOW, RMS, AVERage

Protection Functions

- OVP 1.5 to 22 V, settable 1.5 to 22 V, settable

- OCP 0 to 5 A, settable 0 to 5 A, settable

- Open-sense lead detection

General Data

- Remote control IEEE488.2, RS232C

- Control inputs 2 x measurement trigger, 2 x output inhibit

- Control outputs 2 x complete, 4 x relay driver, fault

±(0 to 4 V) about set

voltage, settable

PEAK, MIN, HIGH, LOW, RMS, AVERage

±(0 to 4 V) about set

voltage, settable

- AC supply 110/115 V and 220/230 V selectable, 50 to 60 Hz

- AC input power 220 VA max. 220 VA max.

- Dimensions 210.8 mm x 87.6 mm x 420 mm without rear and buttom

feet

- Mass 7.5 kg

Environmental Data

- Humidity 85 % at 35 °C non-condensing

- Operating temperature range 0 to 45 °C

- Nominal temperature range 5 to 40 °C, 0 to 35 °C full power

- Storage temperature range -40 to 70 °C

- Temperature coefficient 18 to 28 °C (full accuracy)

5 to 40 °C (0.1 x specification)/°C

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Unit Description Power Supply NGMO

3.4 Function Description

3.4.1 Communication

Fig. 3-3 NGMO2, Pin codes

Channel Relay Connector, rear panel, SUB 15, male

Pin Function Pin Function Signal 1 DVM- 1 RELOUT 1 output, relay driver, open collector 28 VDC/200 mA

2 DVM+ 2 RELOUT 2 output, relay driver, open collector 28 VDC/200 mA

3 FORCE- 3 RELOUT 3 output, relay driver, open collector 28 VDC/200 mA 4 FORCE- 4 RELOUT 4 output, relay driver, open collector 28 VDC/200 mA

5 SENSE- 5 FAULT output, fault signal, open collector 28 VDC/200 mA

6 SENSE+ 6 NC not used not used 7 FORCE+ 7 NC not used not used

8 FORCE+ 8 GND GND signal GND

9 GND GND signal GND 10 INHIBIT_B input, external inhibit signal TTL 0 ... 12 VDC

11 TRIGGER_B input, external inhibit signal TTL 0 ... 12 VDC

12 INHIBIT_A input, external inhibit signal TTL 0 ... 12 VDC 13 TRIGGER_A input, external inhibit signal TTL 0 ... 12 VDC

14 COMPL_B output, complete signal, open

collector

15 COMPL_A output, complete signal, open

collector

28 VDC/200 mA max.

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Power Supply NGMO Unit Description

Fig. 3-4 Circuit diagram: Mobile phone connected to the NGMO2

The NGMO2 provides:

• 2 channels15 V/2.5 (5) A with 7 A

• fast output transient response

• sample buffer for fast current and voltage measurements

• internal and external triggers for current and voltage measurements

• separate DVM’s

• DC-load capability up to 2.8 A

• high voltage setting resolution

• precise low-current measurements

• very low ripple and noise

• settable output impedance for battery emulation

• OVP/OCP

• open sense detection

• auxiliary inputs/outputs (output inhibit, relay, complete)

• small dimensions (2 HU, half 19”)

• interfaces: IEEE488.2, RS232 and (USB)

• fast programming

• effective manual operation

3-8 4.00 / 07-2004

Operation Power Supply NGMO

4 Operation

4.1 Operation Elements

Fig. 4-1 shows the Operation Elements for the Power Supply NGMO2.

NOTE:

Operation elements and Start-up functions of the Power Supply NGMO1 are identical with the NGMO2. Operation elements for channel B must in this case be ignored. Readings in the LC Display correspond with the respective Power Supply.

Fig. 4-1 Power Supply NGMO2, Operation elements on the control panel

4.00 / 07-2004 4-1

Power Supply NGMO Operation

Function

element

Type Function

pushbotton

rotary knob

keys ARROW KEYS (left and right)

POWER

This is the mains switch to turn the NGMO on and off.

VARIATION

This knob has various functions:

• to increase or decrease numerical values in a menu function,

to select options within the menu.

• When no other function is selected, the LCD contrast can be adjusted with the arrow keys.

• The arrow key moves the cursor to the numerical input you want to make,

• or to vary a setting within the menu.

• The arrow keys can also be used to abort the recall or the save

function.

key

1; CHANNEL A; CHANNEL B; 1; Digital Voltmeter A;

Digital Voltmeter B

By pressing this key, channel A or channel B and the associated DVM can be selected. The selected DVM shows an applied external voltage.

2; Voltage setting

Press U-SET to set the output voltage you have selected.

The value you want and, if necessary, modified by pressing the SHIFT key or by turning the variation knob.

3; Overvoltage protection

By pressing the OVP key you can set the max. +force output voltage with respect to the internal ground. If the voltage peaks exceed the set value, the NGMO switches off automatically to protect the unit under test.

4; SAVE

With the SAVE key all settings can be stored in one of the memory locations 1 to 9, except the recall settings, IEEE address, serial interface data, calibration data, which are stored in memory location 0.

4-2 4.00 / 07-2004

Operation Power Supply NGMO

Function

element

Type Function

key

5; MENU

Pressing the MENU key, allows you to select any of the 36 NGMO available optional functions with the variation knob.

A menu need not necessarily have submenus.

6; OUTPUT; ON/OFF

The ON/OFF key is used to turn the output of the current from the selected Power Supply (A, B or both) on or off.

7; Current setting

Press I-SET to set the output current limit of the channel you have selected. The value you want can be entered and modified after you press the SHIFT key or by turning the variation knob.

The max. settable value is 5 V at 5 A. On a higher value than 5 V the max. current output is limited to max. 2.5 A.

key

8; Overcurrent protection

Pressing this key allows you to choose between the options “current protection mode” or “current limit mode”. When the “current protection mode” has been selected, the output is switched off when the max. output current exceeds the set current limit.

9; RECALL

The RECALL key is used to recall all settings stored in memory locations 1 to 9.

Memory location 0 contains the factory default settings which can not be modified.

0; LOCAL

With the LOCAL key the unit operation can be switched from remote control back to local control.

• SHIFT

When the second function of the SHIFT key is selected, numerical values and a decimal point can be entered. Cancel a selected function by pressing the SHIFT key twice.

key

ENTER

Pressing the ENTER key numerical entries made using the SHIFT key or deactivates a setting function.

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Power Supply NGMO Operation

General Note:

• All function keys in the middle of the control panel (CHN 1 A/B/DVM to 0 LOCAL and SHIFT) are assigned two functions, e.g. apart from the main setting functions, the numerals 0 to 9 and the decimal point printed on the keys can be entered to alter values when the shift key has been pressed.

• UUT stands for unit under test in the sequel.

4-4 4.00 / 07-2004

Operation Power Supply NGMO

4.2 Start Up

4.2.1 NGMO Line Power Connection and Power-up

The NGMO operates from a line voltage in the range 120/230 VAC at a frequency between 47 and 63 Hz.

Proceed as follows to connect the NGMO to the AC line and turn on:

1. Before plugging in the power cable, make sure that the power switch is off (the “POWER“ switch has not been pressed and shows “OFF”).

2. Check that the “Mains Voltage Selector“ (4, Fig. 5-2) is set to the appropiate line voltage.

3. Connect the female end of the power cable to the AC receptacle on the rear panel.

4. Connect the Power Supply NGMO to the AC line.

5. Press the push button “Power“ on the front panel.

4.2.2 Main Functions of the NGMO

When the NGMO2 is powered up, it displays the following start-up information:

Rohde & Schwarz

N G M O 2

Next screen after 4 seconds:

Ver:x.yy IEEE Adr:nn

Found: A/B Type:

Ver:x.yy IEEE Adr:nn

Found: Az + Bz

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Operation Power Supply NGMO

Example 1

line 1:

• "AS" means that currently the settings for channel A are displayed. If you turn the output on by pressing the "OUTP. on/off" key the display changes to "AM" indicating that this is now a measured value taken from the output terminals of the selected power supply.

• x.xxx is the output voltage. If "AS" is displayed (output off) x.xxx is the nominal voltage. If "AM" is displayed (output on) x.xxx is the voltage measured on the sense lines of the output terminals.

• y.yyy is the current limit / output current. IF "AS" or "S" is display- ed in front of y.yyy then y.yyy is the current limit setting. If "AM" is displayed y.yyy is the actual current, measured on the force lines of the output terminals.

line 2:

• A:OFF means that the output of power supply A is currently turned off.

• A:ON means that the output of power supply A is currently turned on.

• AB:OFF is displayed if function A/B24 "Common output on/off" (see below Menu Items) is turned on and both outputs are off.

• AB:ON is displayed if function A/B24 "Common output on/off" (see below Menu Items) is turned on and both outputs are on.

• PROT is displayed if the OCP key has been pressed so activating the overcurrent protection function. In OCP active mode, the output is switched off if the current on output lines exceeds the current limit setting (y.yyy). If OCP is turned off, the current is limited to the current limit setting. If NGMO2 enters the current limit state "ILIM" is displayed at the same location as "PROT". "INH" is displayed at the "PROT" location when the output has been turned off by a logical 1 applied to the INHIB_A pin on the "CONTROL I/O" connector.

• RDY is displayed when the NGMO2 has finished sampling and measurement data are ready to be transferred for analysis.

• REM is displayed when the NGMO2 has received remote com- mands via the IEEE interface or serial interface. In remote mode

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Power Supply NGMO Operation

manual setting keys are disabled except the local key and those to change the display mode. This makes it easier for software developers to verify that their software is running correctly. When a lock command has been received from the IEEE interface the NGMO2 enters the lock state. In this state all manual settings are completely disabled. "LOCK" is displayed instead of "REM".

Example 2: is similar to example 1 except that channel B has been

selected using the CHN key.

Example 3:

line 1:

• DVMA means that currently the DVM measurement input of chan- nel A has been selected. The value of the voltage applied to channel A: DVM input is currently displayed.

• z.zzz is the value of the measured voltage in volts.

• DVMA: is selected by pressing the CHN key.

line: 2 is similar to example 1: line: 2.

Example 4: is similar to example 3, except that the voltage of DVM

input of channel B is displayed.

• DVMB: can also be selected by pressing the CHN key.

End of startup

Now, the NGMO2 is in the main function mode. This mode allows the setting of the output voltage, the current limit, the overvoltage protection and the overcurrent protection.

The startup settings depend on the setting of menu item 29 (See description below for further information on recalling settings).

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Operation Power Supply NGMO

4.2.3 Menu

There are two ways of entering numerical settings. The first way is to use the variation knob (16, Fig. 3-1) and the arrow keys (14, 15, Fig. 3-1). The second is to use the keys with the extra blue labels.

4.2.3.1 How to Enter a Numerical Value Using the Variation Knob?

To enter a numerical value using the variation knob, you must first select a function that accepts such entries by pressing, e.g. U-SET, I-SET and OVP. In Menu mode the ENTER key must be pressed first to enter the setting mode. When you have pressed the appropriate key, a small underscore cursor indicates the digit that will be changed when you turn the variation knob. A different digit can be selected with the arrow keys. The right arrow key moves the underscore cursor one digit to the right; the left arrow key moves the underscore cursor one digit to the left. By turning the variation knob clockwise, the value above the cursor and all digits left of the cursor are increased. Turning the knob counter clockwise decreases the value.

To exit the entry mode press either the ENTER key or the function key. The underscore cursor then disappears.

4.2.3.2 How to Enter a Numerical Value directly?

To enter a numerical value directly, you must also first select a function that accepts a numerical input by pressing e.g: U-SET, I-SET and OVP. After that the SHIFT key must be pressed. To indicate that direct numerical input is selected, the NGMO2 displays a blinking block cursor in the input field. Now a value can be directly entered using the blue digit keys. The SHIFT key now acts as a double function key. The SHIFT key is used to enter decimal points for numerical entries. If a decimal point has already been entered, or decimal points are not accepted, SHIFT key aborts the ongoing entry and the old value is restored. The right arrow key can also be used to abort an entry which is being made.

The left arrow key acts as a back-space key. Each time the left arrow key is pressed, a digit is selected. When the ENTER key is pressed, the new value is accepted and the direct numerical entry mode is terminated.

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Power Supply NGMO Operation

NOTE:

If you are in the Menu mode and you have selected a function that accepts numerical entries, the direct numerical input mode can be activated by pressing the SHIFT key without first pressing the ENTER key. However, it is also possible to first select the variation knob entry mode by pressing the ENTER key and then entering the direct numerical entry mode by pressing the SHIFT key.

4.2.3.3 How to Change Settings in Menu Mode?

Most NGMO2 settings can only be changed inside the Menu mode. To enter the Menu mode, press the MENU key once. A brief message is displayed how to navigate through the menu. The NGMO2 then displays “A01.” or “B01.“(after power-on) or when you re-enter the Menu mode, the last menu item that was previously selected. Now, a menu item can be selected by turning the variation knob. The action to change an item value or setting depends on the kind of item. If an item type has predefined options, just press the left arrow key to move the square brackets around a value one to the left and the right arrow key to move it one to the right. The new selected setting comes into effect immediately. The ENTER key does not need to be pressed.

Items that accept numerical values are changed by using the variation knob or the direct numerical input as described above. To enter one of these modification modes either the ENTER key (for variation knob entry) or the shift key must be pressed. To leave the entry mode just press the ENTER key, which brings you back to the menu item selection mode.

NOTE:

Please note that the presence of absence of the cursor tells you what the current entry mode is. If no cursor is displayed, you are in menu item selection mode; if the underscore cursor is displayed, you are in the variation knob entry mode and if a flashing, solid cursor is displayed, the direct numerical entry mode has been selected.

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Operation Power Supply NGMO

4.2.3.4 Menu Items

The menu includes a selection of items from A01 or B01 to A38 or B38:

(The indicated channel A or B depends on which channel is selected.)

A/B01: Current range

[AUTO] 5A .5A 5mA

This function selects the range for static current measurement (see main screen) and also selects the current range for signal analysis. The analysis mode is only available in the ranges .SA and SA.

A/B02: Static Measure

Interval (2-200 ms)

This setting specifies the repetition time between two static current and DVM measurements. Any value from 2 to 200 ms can be selected.

A/B03: Static Measure

Average Count (1-10)

This setting specifies the average count for static current and DVM measurements. Values from 1 to 10 can be selected. The total measurement time for static measurements is the product of “Static Measure Interval” multiplied by “Static Measure Average Count”.

A/B04: Output Impedance

(0-1.00 Ohms)

This menu item lets you set the output impedance from

0.00 Ohms to 1.00 Ohms im 10 mOhms steps.

A/B05: Output Bandwidth

high low

This menu item lets you select one of two different output regulation characteristics. When in “High” mode the NGMO2 has the fasted regulation speed available (see specifications for further information), but this may result in an unstable load regulation for inductive loads.

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Power Supply NGMO Operation

A/B06: Sample Channel

[Current DVM]

This menu items lets you select the source for the NGMO2 analysis functions. When “current” is selected the analysis functions use the internal current measure circuits for analysis (ranges 5A or .5A). In “DVM” mode the external DVM inputs are used for analysis.

A/B07: Trigger Level

Range: 5A (0.0000-7.0000A)

Lets you set the trigger level in the 5A range (see menu item A/B01) and the signal analysis functions. Any value between 0.0000 A (Auto) and 7.0000 A that is a multiple of 200 uA can be selected. An asterisk on the right of line two of the LCD indicates when the 5A range has been selected in menu item A/B01.

A/B08: Trigger Level

Range 0.5A (0.00-500.00A)

Lets you set the trigger level in the 0.5A range (see menu item A/B01) and the signal analysis functions. Any value between 0.00 mA (Auto) and 500.00 mA that is multiple of 10 uA can be selected. An asterisk on the right of line two of the LCD indicates when 0.5A range has been selected in menu item A/B01.

A/B09: Trigger Level

DVM: (-6.000-25.000V)

Lets you set the trigger level for the DVM input (see menu item A/B06) and the signal analysis functions. Any value between -6.000 V (Auto) and +25.000 Volts that is a multiple of 1 mV can be selected. An asterisk on the right of line two of the LCD indicates when “Sample Channel: DVM” has been selected in menu item A/B06.

A/B10: Trigger Timeout

(0-60.000 seconds)

f you are using the analysis mode (sampling mode) this function specifies the time in seconds the sampling unit waits for a trigger condition before a timeout message is generated after turning sampling mode on. Any value from

0.000 seconds (infinite) to 60.000 seconds can be selected.

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Operation Power Supply NGMO

A/B11: Trigger Source

[int] ext

The trigger source function lets you select either an internal trigger source (see A/B07 to A/B09) or use an external trigger signal to start an analysis measurement. The external trigger signal can be applied on the rear panel.

A/B12: Trigger Slope

[pos] neg

The trigger slope specifies the slope (positive or negative transition) used for signal triggering. A positive slope is a low-to-high current or voltage transition, a negative slope specifies a high-to-low transition.

A/B13: Trigger Count

(1-100)

The trigger count specifies the number of times the analysis measurement is repeated to calculate the average value for: Average, Peak, Min, High, Low and RMS functions. Any value from 1 to 100 can be selected.

A/B14: Trigger Offset

(-5000-50000 points)

The trigger offset specifies a trigger delay for analysis measurements in terms of a certain number of sampling points. A positive “Trigger offset” specifies a delay, a negative “Trigger offset” specifies an advance trigger (pre trigger).

Any integer value between -5000 to 50000 can be selected.

A/B15: Sample length

(1-5000 points)

The sample length is the number of samples that are taken for a measurement signal analysis.

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Power Supply NGMO Operation

A/B16: Sample Interval

(0.01-1000 ms)

The sample interval is the time interval between two consecutive samples used for measurement or signal analysis. Both the “Sample length” and the “Sample Interval” makes the total measuring time for one sample cycle. The total time for one sample cycle is equal to the “Sample length“ x “Sample Interval”.

A/B17: Sample start

[ON OFF]

Setting the “Sample start” to ON initialises a sample or analysis measurement. After “Sample start” has been set to ON the sampling circuit waits for a trigger event. This can be either an internal or external trigger. After detecting the trigger condition, the input signal is sampled using the given "Sample interval" (see A/B16) and the given "Sample length" (see A/B15). The number of times this measurement cycle is repeated is given by the "Trigger count" (see A/B13). If "Trigger timeout" (see (A/B10) is set to a value greater than 0 and no trigger condition is met after "Sampling start" is set to ON for the time specified by "Trigger timeout" the error message "Trigger timeout" is displayed on the LCD. Both conditions - a normal end of measurement or a "Trigger timeout" - will reset the "Sample start" to OFF.

A/B18:

A/B19: Meas. + Read Type

Read SAMP. Values Press ENT to display

After a successful input signal measurement (sampling, see A/B17), press the ENTER key to display the results at the sampling points. Specific values can be selected with the arrow keys or the rotary knob.

[AVER] PEAK MIN HIGH LOW RMS

The “Meas. + Read Type” menu item lets you select a signal analysis type with the right or the left arrow key. After selecting one of the 6 possible settings, the result can be displayed by changing to menu item A/B20. Because all possible analysis types are calculated internally after each sampling cycle every setting is allowed.

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Operation Power Supply NGMO

A/B20: READ xxx Value

(Result)

The “READ xxx Value” menu item (xxx = AVER PEAK MIN HIGH LOW RMS) (see also A/B19) displays the result for the selected analysis function. If there is no result available (because there is no data that can be analyzed) only a line is displayed.

A/B21: Maximum output

Voltage (0.000-15.000 V)

This menu item is an NGMO2 safety feature. Setting a voltage value below 15.000 volts limits the maximum settable output voltage in the main display to the voltage given here. A connected device is therefore protected from voltages above the maximum allowed ratings.

A/B22: Maximum output

Current (0.000-5.000 A)

This menu item is an NGMO2 safety feature. Setting a current value below 5.000 Amperes limits the maximum settable output current limit in the main display to the current limit given here. A connected device is therefore protected from currents above the maximum allowed ratings.

A/B23: Beep on Current

limit: [on] off

When “Beep on Current limit” is set on the NGMO2, there is a short beep whenever the NGMO2 enters the current limit state.

A/B24: Common Output on

off: [on] off

When “Common Output on off” is set to OFF, the key “OUTP. on/off” switches only the output channel that is currently displayed or selected via remote command ON or OFF. If “Common Output on/off” is set to ON, the “OUTP. on/off” key acts simultaneously on both output channels. A remote command also acts on both channels.

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Power Supply NGMO Operation

A/B25: Relay 1

[on] off

Turns the output driver for relay 1 on or off. The driver signal is applied to the “Control I/O” connector, Pin 1 on the rear panel (ground on pin 8 and 9).

A/B26: Relay 2

[on] off

Turns the output driver for relay 2 on or off. The driver signal is applied to the “Control I/O” connector, Pin 2 on the rear panel (ground on pin 8 and 9).

A/B27: Relay 3

[on] off

Turns the output driver for relay 3 on or off. The driver signal is applied to the “Control I/O” connector, Pin 3 on the rear panel (ground on pin 8 and 9).

A/B28: Relay 4

[on] off

Turns the output driver for relay 4 on or off. The driver signal is applied to the “Control I/O” connector, Pin 4 on the rear panel (ground on pin 8 and 9).

A/B29: Recall setting

when power on (0-10)

The NGMO2 saves sets of settings in an internal EEPROM. With the menu item “Recall settings when power on” a user can select, which of the stored settings are loaded when the device is powered up.

0: use factory defaults after power up

1 to 9: use user-defined settings, that have been previously stored with the “SAVE” function 1 to 9.

10: use the last manual settings as the new power up settings.

A/B30: IEEE Address

(1-30)

This setting specifies the IEEE address of the NGMO2. This setting is independent of the setting made with menu item 29 (Recall setting, when power on).

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Operation Power Supply NGMO

A/B31: Serial interface

[on] off

When set to ON, a RS232 connection to the NGMO2 can be used as a remote interface. This setting is independent of the setting made with menu item 29 (Recall setting when power on).

A/B32: Serial Speed

(300, 600, 1200, 2400, 4800, 9600, 19200, 38400 Baud)

With this menu item the speed (Baud Rate) for the serial interface can be set using the rotary knob. Numerical entries can not be made with the “SHIFT” key. This setting is independent of the setting made with menu item 29 (Recall setting, when power on).

A/B33: Serial count of

Databits [7] 8

This menu item selects the data length for the serial interface. This can be either 7 bits or 8 bits. Note, when a data length of 7 is selected only even or odd parity can be used due hardware limitations of the internal interface. This setting is independent of the setting made with menu item 29 (recall setting when power on).

A/B34: Serial Parity

[node] odd even

With menu item “Serial Parity” the user can select the data integrity checking method for serial communication. This setting is independent of the setting made with menu item 29 (recall setting when power on).

none: No check bits are sent or received and checked.

odd: The number of ones in a data word (including parity

bit) is odd.

even: The number of ones in a data word (including parity bit) is even.

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Power Supply NGMO Operation

A/B35: Serial count of

stopbits [1] 2

This menu item is used to select “Serial count of stopbits” for data transmission. When set to 1, only one stopbit is transmitted before the start of the next data byte. When set to 2, two stopbits are transmitted before the next data byte

- this means synchronisation is better but there are fewer transfers per second. This setting is independent of the setting made with menu item 29 (recall setting when power on).

A/B36: Serial Handshake

[none] HW xon/xoff

This menu item lets you set the serial handshake mode.

• none: NGMO2 does not use handshaking for serial communication. This mode assumes that both ends are always ready for data transfers.

• HW: NGMO2 uses the serial handshake lines RTS and CTS for handshaking. If RTS is low, (not active) no data must be sent to NGMO2. If CTS is low, no data is send from NGMO2.

• Xon/XOff: NGMO2 uses a software handshake for serial communication. The Xoff control character suspends serial communication; XON continues serial communication.

A/B37: Serial Receive

Delimiter: [CR] LF

The setting of “Serial Receive Delimiter” decides which control character is used for delimiting a command that is sent to the NGMO2 using the serial interface. If CR is set, the NGMO2 waits for a carriage return (Control M) as the end of command character. If LF is set, NGMO2 waits for a line feed (Control J). If LF is set, a CR may precede the delimiter LF. This setting is independent of the setting made with menu item 29 (recall setting when power on).

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Operation Power Supply NGMO

A/B38: Calibration mode

Press ENT to select

After pressing the enter key the user enters the calibration mode for the NGMO.

See Service Manual – Chapter 7 (192.1500.82)

NOTE:

The calibration of the Power Supply NGMO has to be made by Rohde & Schwarz personnel or an authorized company.

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Power Supply NGMO Operation

4.3 Test Connections

ELECTROCUTION HAZARDS!

Observe the relevant safety regulations when operating electrical devices.

Do not float the power supply output more than 25 V from chassis.

Otherwise, in addition to the output voltage above 50 VDC can increase at the terminals and present electric shock hazard to the operator.

4.3.1 Remote Sense

Fig. 4-2 Four-wire sense connection

As shown in Fig. 4-2 the channels are intended to be operated with remote sense leads (4-wire connection). The sense+ and sense- pins provide output voltage sensing.

Use voltage protection to turn off the output and protect against extremes (refer to 4.1: Operating Elements, 4.2.3: Menu).

Make sure, that the senses are properly connected.

Connect the sense inputs to the NGMO2 as close as possible to the load’s source inputs using twisted pairs (see Fig. 4-2). This is necessary to achieve the maximum transient performance of the NGMO2.

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Operation Power Supply NGMO

4.3.2 Local sense

Fig. 4-3 Local sense connections

The NGMO2 can be connected to operate with local sense leads (2- wire connection) as shown in Fig. 4-3. When this connection scheme is used the sense inputs and supply outputs are jumpered at the rear of the NGMO2.

4.3.3 Output Impedance

The NGMO2 has a variable output impedance feature on both channels. This output impedance setting allows the performance of the battery channel to closely model a real battery’s performance with a dynamic load. When setting the output impedance to a certain value (R the output voltage drop will be proportional to the output current (see formula below). The output voltage will be reduced by the voltage drop. Voltage drop equation: V

drop(t) = RI x I(t)

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Power Supply NGMO Operation

4.4 Factory Defaults

The NGMO can be set to power up using the factory default conditions or the user-saved setup conditions. The factory defaults are listed in chapter 5 IEEE Commands.

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Power Supply NGMO Operation

Meaning:

• x.yy is the version number of the currently installed firmware x = major version number, yy = minor version number.

• nn = currently selected IEEE address for the device

• Az = type of power supply board mounted at location A in the

NGMO. Currently, only type 3 is available.

• Bz = type of power supply board mounted at location B in the

NGMO2. Currently only type 3 is available.

Next screen after 2 seconds:

(1)

or (2)

or (3)

or (4)

"AS x.xxxV y.yyy A" (1)

"A:OFF PROT RDY REM"

"BS x.xxxV y.yyy A" (2)

"B:OFF PROT RDY REM"

"DVMA: z.zzz V" (3)

"A:OFF PROT RDY REM"

"DVMB: z.zzz V" (4)

"B:OFF PROT RDY REM"

The examples above illustrating display depend on the current setting and the current NGMO2 mode.

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Operation Power Supply NGMO

4.5 Measurements

The NGMO2 provides three multiplexed measure channels on each supply channel (A/B) for the measurement of output VOLTAGE and CURRENT as well as for the additional DVM input. The VOLTAGE channel is used only for static measure functions (readback), CURRENT and DVM channels are used for static and dynamic measure functions.

The value ranges represented below are valid for static and dynamic measurements.

Measurement -OVR displayed values OVR

DVM -6 V -5.999 - 25.999 V

Voltage - 0.000 - 15.999 V

Current

Current Range 1

Current Range 2 - 0.00 - 510.00 mA > 510 mA

Current Range 3 - 0.0000 - 5.1000 mA > 5.1 mA

Autorange

≥ -4 A

Change Range at Borders

R1 to R2: 0.5000 A R2 to R3: 5.00 mA R3 to R2: 5.1000 mA R2 to R1: 510.00 mA

-3.9999 - 7.0000 A > 7 A

≥ 26 V

≥ 16 V

4.5.1 Reading back Voltage (V), Current (I), DVM

The sample interval for the static measurements (readback) is settable between 2 and 200 ms in 1-ms steps. An averaging over up to ten values can be selected for this measurements.

4.5.2 Dynamic Measurements

Dynamic measurements are available for the CURRENT channel in the 5 A and 0.5 A range and for the DVM channel. The measure system of the NGMO2 allows to record current and voltage waveforms with sampling frequencies up to 100 k-samples per second . That means samples can be taken and stored in time intervals off 10 µs. Because using a Sigma-Delta AD converter with an high internal sampling rate, even very short events (<< 10 µ) will have an influence on the delivered

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Power Supply NGMO Operation

sample value. That is important to protect against losing information when observing signals over a long time period.

The sample interval can be set between 10 µs and 1 s in 10 µs steps. At sample intervals greater than 10 µs the NGMO2 measure system samples internally in 10 µs intervals and averages the taken samples to build values in the selected time intervals.

Example:

With a selected sampling interval of 1.00 ms every sample value that is stored in the measurement buffer is an average out of 100 samples.

Fig. 4-4 Sample values

The measurement buffer is able to store up to 5000 sample values which can be read out separately to generate graphic representations and which are used to build the specific pulse values as AVERage, PEAK, MIN, HIGH, LOW and RMS.

By selecting a sample Intervall of 1 s and the maximum sample number of 5000, the NGMO2 is able to observe a signal for a time period of more than 80 minutes without losing significant information about the signal course.

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Operation Power Supply NGMO

4.5.2.1 Trigger System

A dynamic measurement sequence is specified by the selected sample interval (0.01 ... 1000.00 ms) and the required number of sample points (Sample Length: 1... 5000). It is initialized by starting the sample mode (Sample Start > „on“ ) and then the trigger system detects the valid sample values depending on the selected trigger parameters. The measurement stops if either the selected number of values has been taken or the measurement buffer is full.

The trigger system allows the start of recording a signal before, at or after the trigger signal. Therefore a trigger offset can be set between 5000 to 50000. With a positive trigger offset a trigger delay can be generated depending on the selected sample intervall.

Fig. 4-5 Pre-trigger and post-trigger acquisition

The trigger system of the NGMO2 allows the automatic repetition of such measurement sequences up to 99 times to build average pulse values. Therefore a triggercount is settable between 1 and 100 in the menue which represents the number of sequences to be executed before the measurement is stopped.

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Power Supply NGMO Operation

Fig. 4-6 Measurement repetition

NOTE:

The post- or pre-trigger is only available for a single sample sequence (triggercount = 1). With a selected triggercount > 1 data acquisition starts at the trigger signal for any sequence.

For each measurement range the trigger level is settable in the specified value borders with the given resolution of that range. With setting the trigger level to the low border of the selected measurement range, the AUTO TRIGGER is activated for that range. In this mode when starting a sample sequence the trigger system searches for a significant value change of the watched signal and sets the trigger level automatic if such a value change occurs.

In remote mode also software triggered measurments are possible with the NGMO.

4.5.2.2 Pulse Analysing

The NGMO2 provides the analysing of pulsed signals, which delivers the values of several pulse characterising sizes. This values are formed out of the samples as described below.

For all values the following applies to the result. With a selected triggercount x greater than one at first the pulse value is formed for each of the x single measurement sequences and than the average of these x values is formed to get the final result.

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Operation Power Supply NGMO

PEAK: The absolute highest sample that occurs during the measu-

rement sequence is stored as the PEAK value.

MIN: Analogous to PEAK the absolute lowest sample value is u-

sed to form the MIN value.

For the computation of the HIGH, LOW, AVERage and RMS values a

imaginary „change level“ is used representing the middle between the PEAK value and the MIN value. This „change level“ is used to detect the beginnings and the ends of signal periods and the change between high and low fragments of the signal course.

NOTE:

The pulse analysis for the HIGH, LOW, AVERage and RMS values delivers correct results only for periodical signals.

HIGH: For the HIGH value the average of all samples with values

higher than the change level is formed and stored.

LOW: For the LOW value the average of all samples with values

lower than the change level is formed and stored.

AVER: For the computation of the AVERage value only complete

recorded signal periods are considered and the average of all samples belonging to this periods is formed and stored.

RMS: For the computation of the RMS value only complete recor-

ded signal periods are considered and the square average of all samples belonging to this periods is formed and stored.

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Power Supply NGMO Operation

4.6 Status Structure

The NGMO2 provides a series of status registers and queues allowing the operator to monitor and manipulate the various instrument events. The status structure is shown in Fig. 4-4. The heart of the status structure is the status byte register. This register can be read by the user’s test program to determine if a service request (SRQ) has occurred, and what event caused it.

4.6.1 Status Byte and SRQ

The status byte register receives the summary bytes of four status register sets and two queues. The register sets and queues monitor the various instrument events. When an enabled event occurs, it sets a summery bit in the status byte register. When a summary of a status byte is set and its corresponding enable bit is set (as programmed by the user), the RQS/MSS bit will set to indicate that an SRQ has occurred.

4.6.1.1 Status Register Sets

A typical status register set is made up of a condition register, an event register and an event enable register. A condition register is a read-only register that is continously updated to reflect the present operating conditions of the instrument.

When an event occurs, the appropriate event register bit is set to 1. The bit remains latched to 1 until the register is reset. When an event register bit is set and its corresponding enable bit is set (as programmed by the user), the output (summary) of the register is set to 1, which in turn sets the summary bit of the status byte register.

4.6.2 Queues

The NGMO2 uses an output queue and an error queue. The response messages to query commands are placed in the output queue. As various programming errors and status messages occur, they are placed in the error queue. When a queue contains data, it sets the appropriate summary bit of the status byte register.

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Operation Power Supply NGMO

Fig. 4-7 Status model structure

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Power Supply NGMO Operation

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IEEE Commands Power Supply NGMO

5 IEEE Commands

* = Factory defaults

<NUM_VAL> = integer or real

<CHAR_VAL> = string

5.1 IEEE-488-2 common commands and queries

Com-

mand

*CLS See status

*ESE <NUM_VAL> See status

*ESE? <NUM_VAL> See status

*ESR? See status

*IDN? Returns the

*OPC Sets the operation

*OPC? Places an ASCII

*RCL <CHAR_VAL> or

*RCL? <CHAR_VAL> Queries the

Parameter Par. value Description Def. SCPI

model structure for further information

<NUM_VAL>

0 Factory settings

1 First user setting

9 Ninth user setting

MIN Factory settings

MAX Ninth user setting

Clears all event registers and error queues

Program the standard event enable register

Reads the standard event enable register

Reads the standard event enable register and clears it

manufacturer, model number, serial number, and firmware revision levels of the unit

complete bit in the standard event register

"1" into the output queue when selected device operations have been completed

Returns the power supply to the usersaved setup (0...9)

possible min and Max value

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Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

MIN 0

MAX 9

*RST Returns the power

*SAV <CHAR_VAL> or

<NUM_VAL>

1 First user setting

9 Ninth user setting

MIN First user setting

MAX Ninth user setting

*SAV? <CHAR_VAL> Queries the

MIN 1

MAX 9

*SRE <NUM_VAL> See status

model structure for further information

*SRE? <NUM_VAL> See status

model structure for further information

*STB? See status

model structure for further information

*ARM Sends a

*AARM Sends a

*BARM Sends a

*TRG Sends a

*ATRg Sends a

supply to the *RST default conditions

Saves the present setup as the usersaved setup (1..9)

possible min and max value

Programs the service request enable register

Queries the serviee request enable register

Reads the status byte register

“SENSE:PULSE:S TART ON" command to both channels

“SENSE:PULSE:S TART ON" command to channel A

“SENSE:PULSE:S TART ON" command to channel B

“SENSE:PULSE:S TART ON" and a soft trigger command to both channels

“SENSE:PULSE:S TART ON" and a soft trigger command to channel A

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IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

*BTRg Sends a

*TST? Performs a

*WAI Waits until all

:DISPlay :ENABle <CHAR_VAL> Enables or

OFF Turns display off

ON Turns display on

MIN Turns display off

* DEFault Turns display on

MAX Turns display on

:DISPlay :ENABle? <CHAR_VAL> Queries status of

MIN OFF

DEFault ON

MAX ON

:DISPlay :CHANnel <CHAR_VAL> Changes the

A Channel A A

B Channel B

DVMA DVM A

DVMB DVM B

MIN Channel A

DEFault Channel A

MAX DVM B

:DISPlay :CHAN-

nel?

MIN A

DEFault A

“SENSE:PULSE:S TART ON" and a soft trigger command to channel B

checksum test on ROM and returns 0 for test OK and 1 for test failed

previous commands are executed

disables the LC Display

(fast data mode)

display

Results:

OFF

active display channel

Queries the active display channel setting

Results:

DVMA

DVMB

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Power Supply NGMO IEEE Commands

Command

Parameter Par. value Description Def. SCPI

MAX DVMB

5-4 4.00 / 07-2004

IEEE Commands Power Supply NGMO

5.2 FORMAT command summary

Com-

Parameter Par. value Description Def. SCPI

mand

:FORMat [:DATA] <CHAR_VAL> Specifies the

ASCii ASCII

LONG Long integer

SREal Short real

DREal Double real

MIN ASCII

* DEFault ASCII

MAX Double real

:FORMat [:DATA]? <CHAR_VAL> Queries selected

MIN ASCII

DEFault ASCII

MAX DREAL

:FORMat :BORDer <CHAR_VAL> Specifies byte

NORMal Normal byte order

SWAPped Swapped byte

MIN Normal

* DEFault Normal

MAX Swapped

:FORMat :BORDer? Queries byte order

MIN NORMAL

DEFault NORMAL

MAX SWAPPED

output data format for Fetch, Read and Message command.

data format

Results:

ASCII

LONG

SREAL

DREAL

order for non ASCII output formats.

(MSB first)

order (LSB first)

Results:

NORMAL

SWAPPED

ASCII

NORMAL

4.00 / 07-2004 5-5

Power Supply NGMO IEEE Commands

5.3 OUTPut command summary

Com-

Parameter Par. value Description Def. SCPI

mand

:OUT [:A] <CHAR_VAL> OFF Turns output A off OFF

<CHAR_VAL> ON Turns output A on

:OUT :B <CHAR_VAL> OFF Turns output B off OFF

<CHAR_VAL> ON Turns output B on

:OUTPut [:A] Channel A /

:OUTPut [1]

:OUTPut :B Channel B /

:OUTPut2 Channel B /

[:STATe] <CHAR_VAL> Turns output ON or

OFF Turns output off

ON Turns output on

MIN Turns output off

* DEFault Turns output off

MAX Turns output on

DISPlay Sets LCD to main

[:STATe]? <CHAR_VAL> Queries state of

MIN OFF

DEFault OFF

MAX ON

:OPENsense

:OPENsense?

* DEFault ON

<CHAR_VAL> OFF Turns open sense

ON Turns open sense

MIN Turns open sense

DEFault Turns open sense

MAX Turns open sense

<CHAR_VAL> Queries of open

MIN OFF

MAX ON

Channel 1

Channel A / Channel 1

Channel 2

OFF (A or B)

screen

output

Results:

OFF

detection off

detection on

detection off

detection on

sense detection setting

OFF

5-6 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

:BANDwidth

* DEFault Bandwidth high

:BANDwidth?

:IMPedance

* DEFault Impedance 0 Ohm

:IMPedance?

:OUTPut [:A]

:RELay1 Relay 1

:RELay2 Relay 2

:RELay3 Relay 3

:RELay4 Relay 4

<CHAR_VAL> Selects slow or fast

HIGH Bandwidth high

LOW Bandwidth low

MIN Bandwidth high

MAX Bandwidth low

DISPlay Sets LCD to

<CHAR_VAL> Queries bandwidth

MIN HIGH

DEFault HIGH

MAX LOW

<CHAR_VAL> or <NUM_VAL>

0.00 0 Ohm

1.00 1 Ohm

MIN Impedance 0 Ohm

MAX Impedance 1 Ohm

DISPlay Sets LCD to

<CHAR_VAL> Queries impedance

MIN 0.00

DEFault 0.00

MAX 1.00

<CHAR_VAL> Closes or opens

ZERo Opens

ONE Closes

OFF Opens

regulation speed

OUTPUT BANDWIDTH

settings

Results:

LOW

HIGH

Specifies the output impedance to apply. 0 Ohms to 1Ohms in 10 mOhm steps

OUTPUT IMPEDANCE

settings

Results:

0.00 <= NUM_VAL <= 1.00

relay control circuit

HIGH

0 Ohms

ZERO or OFF

4.00 / 07-2004 5-7

Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

ON Closes

MIN Opens

* DEFault Opens

MAX Closes

DISPlay Sets LCD to

:RELay1? Relay 1

:RELay2? Relay 2

:RELay3? Relay 3

:RELay4? Relay 4

<CHAR_VAL> Queries the ON /

MIN OFF

DEFault OFF

MAX ON

RELAIS <n>

OFF state of the corresponding relay port pin / digital I/O

Results:

OFF

5-8 4.00 / 07-2004

IEEE Commands Power Supply NGMO

5.4 SENSE command summary

Com-

Parameter Par. value Description Def. SCPI

mand

:SENSe [:A] Channel A /

:SENSe[1] Channel A /

:SENSe :B Channel B /

:SENSe2 Channel B /

:FUNCtion <CHAR_VAL> Selects Fetch,

"VOLTage" or VOLTage

"CURRent" or CURRent

"DVMeter" or DVMeter

"AVERage" or AVERage

"PEAK" or PEAK

"MIN" or MIN Min and sample

"HIGH" or HIGH

"LOW" or LOW

"RMS" or RMS

:FUNCtion ?

:CURRent [:DC] :RANGe [:UPPer] <CHAR_VAL> Selects expected

HIGH or 5[A] 5A

MEDium or

0.5[A]

Channel 1

Channel 2

Read, Measure function type

Static voltage measurement

Static current measurement

Static DVM measurement

Average and sample measurement

Peak and sample measurement

measurement

High and sample measurement

Low and sample measurement

Rms and sample measurement

Queries measurement setting

Results:

VOLTAGE

CURRENT

DVMETER

AVERAGE

PEAK

MIN

HIGH

LOW

RMS

current measurement range

500mA

VOLT AGE

HIGH or 5[A]

4.00 / 07-2004 5-9

Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

LOW or

0.005[A]

AUTO Auto ranging

MIN Auto ranging

* DEFault 5A

MAX 5mA

DISPlay Sets LCD to:

:CURRent [:DC] :RANGe [:UPPer]? <CHAR_VAL> Queries current

MIN AUTO

DEFault HIGH

MAX LOW

:MEASure :INTerval <CHAR_VAL> or

<NUM_VAL>

2.00E-03 Measurement

2.00E-01 Measurement

MIN 2 ms

* DEFault 10 ms

MAX 200 ms

DISPlay Sets LCD to

:MEASure :INTerval? <CHAR_VAL> Queries measure-

MIN 0.002 ms

DEFault 0.01 ms

MAX 0.2 ms

:AVERage [:COUNt] <CHAR_VAL> or

<NUM_VAL>

1 Average count = 1

10 Average count =

MIN 1

* DEFault 1

MAX 10

5mA

CURRENT RANGE

range

HIGH

MEDIUM

LOW

AUTO

Sets the measurement interval for voltage and current

interval = 2 ms

interval = 200 ms

STATIC MEASURE INTERVAL

ment interval

Results:

2E-3 <= NUM_VAL <= 0.2

Sets the measure average count

5-10 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

DISPlay Sets LCD to

:AVERage [:COUNt]? <CHAR_VAL> Queries measure-

MIN 1

DEFault 1

MAX 10

:PULSe :TRIGger :STATe? Queries current

:PULSe [:MEAS-

ure]

* DEFault Current

:PULSe [:MEAS-

ure]

:PULSe [:MEAS-

ure]

* DEFault Off

:CHANnel <CHAR_VAL> Selects pulse

CURRent Current

DVM DVM measure-

MIN Current

MAX DVM measure-

DISPlay Sets LCD to

:CHANnel?

:STARt <CHAR_VAL> Select pulse

<CHAR_VAL> Queries pulse

MIN CURRENT

DEFault CURRENT

MAX DVM

OFF Off

ON On

MIN Off

STATIC AVERAGE COUNT

ment interval

Results:

1 <= NUM_VAL <= 10

trigger status

Results:

NONE

TRIGGERED

READY

TIMEOUT

measurement channel

measurement

ment

measurement

ment

SAMPLE CHANNEL

measurement channel

Results:

CURRent

DVM

measurement state

CURRENT

OFF

4.00 / 07-2004 5-11

Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

MAX On

DISPlay Sets LCD to

:PULSe [:MEAS-

ure]

:PULSe [:MEAS-

ure]

* AVERage Average

:PULSe [:MEAS-

ure]

:PULSe :TRIGger :LEVel :HIGH <CHAR_VAL> or

* DEFault 2.5 A

:PULSe :TRIGger :LEVel :HIGH? <CHAR_VAL> Queries trigger

:STARt? <CHAR_VAL> Queries pulse

MIN OFF

DEFault OFF

MAX ON

:TYPE <CHAR_VAL> Selects pulse

PEAK Peak

MIN Min

HIGH High

LOW Low

RMS Rms

DISPlay Sets LCD to

:TYPE? <CHAR_VAL> Queries pulse

<NUM_VAL>

1.00E-04 0.1 mA

7 7 A

AUTO or 0 Auto trigger

MIN 0 mA -> AUTO

MAX 7 A

DISPlay Sets LCD to

SAMPLE START

measurement status

Results:

OFF

measurement and read type

MEASURE + READ TYPE

measurement and read type

Results:

AVERAGE

PEAK

MIN

HIGH

LOW

RMS

Sets trigger level for 5A (HIGH) range

TRIGGER LEVEL RANGE 5A

level for 5A (HIGH) range

Results:

AVER AGE

2.5 A

5-12 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

1E-4 <= NUM_VAL <= 7

MIN 0.0

DEFault 2.5

MAX 5.0

:PULSe :TRIGger :LEVel :LOW <CHAR_VAL> or

<NUM_VAL>

1.00E-05 0.01 mA

0.5 500 mA

AUTO or 0 Auto trigger

MIN 0A -> AUTO

* DEFault 250mA

MAX 500 mA

DISPlay Sets LCD to

:PULSe :TRIGger :LEVel :LOW? <CHAR_VAL> Queries trigger

MIN 0.0

DEFault 2.5E-1

MAX 5.0E-1

:PULSe :TRIGger :LEVel :DVM <CHAR_VAL> or

<NUM_VAL>

-5.999 -5.999 Volt

25.000 25.000 Volt

MIN AUTO

* DEFault 0 Volt

MAX 25.000 Volt

DISPlay Sets LCD to

AUTO Auto trigger

:PULSe :TRIGger :LEVel :DVM? <CHAR_VAL> Queries trigger

MIN AUTO

DEFault 0.000

MAX 25.000

:PULSe :TRIGger :SOURce <CHAR_VAL> Selects trigger

INT Intern

EXT Extern

Sets trigger level for 0.5A (LOW) range

TRIGGER LEVEL RANGE 0.5 A

level for 5mA range

Results:

1E-5 <= NUM_VAL <= 0.5

Sets trigger level DVM

TRIGGER LEVEL DVM

level DVM

Results:

-5.999 <= NUM_VAL <=

25.000

source

2.5 mA

0 V

INT

4.00 / 07-2004 5-13

Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

MIN Intern

* DEFault Intern

MAX Extern

DISPlay Sets LCD to

:PULSe :TRIGger :SOURce? <CHAR_VAL> Queries trigger

MIN INT

DEFault INT

MAX EXT

:PULSe :TRIGger SLOPe <CHAR_VAL> Selects trigger

POS Positive

NEG Negative

MIN Positive

* DEFault positive

MAX Negative

DISPlay Sets LCD to

:PULSe :TRIGger SLOPe? <CHAR_VAL> Queries trigger

MIN POS

DEFault POS

MAX NEG

:PULSe :SAMPle :LENGth <CHAR_VAL> or

<NUM_VAL>

1 Sample length 1

5000 Sample length

MIN Sample length 1

* DEFault Sample length 1

MAX Sample length

DISPlay Sets LCD to

:PULSe :SAMPle :LENGth? <CHAR_VAL> Queries sample

MIN 1.00

TRIGGER SOURCE

source

Results:

INT

EXT

slope

TRIGGER SLOPE

slope

Results:

POS

NEG

Sets sample length

5000

SAMPLE LENGTH

length

Results:

1 <= NUM_VAL <= 5000

POS

5-14 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

DEFault 1.00

MAX 5000.00

:PULSe :TRIGger :OFFSet <CHAR_VAL> or

<NUM_VAL>

-5000 Trigger offset

50000 Trigger offset

MIN Trigger offset

* DEFault Trigger offset 0

MAX Trigger offset

DISPlay Sets LCD to

:PULSe :TRIGger :OFFSet? <CHAR_VAL> Queries trigger

MIN -5000.00

DEFault 0.00

MAX 50000.00

:PULSe :TRIGger :COUNt <CHAR_VAL> or

<NUM_VAL>

1 Trigger count 1

100 Trigger count 100

MIN Trigger count 1

* DEFault Trigger count 1

MAX Trigger count 100

DISPlay Sets LCD to

:PULSe :TRIGger :COUNt? <CHAR_VAL> Queries trigger

MIN 1.00

DEFault 1.00

MAX 100.00

:PULSe :TRIGger :TIMeout <CHAR_VAL> or

<NUM_VAL>

0.001 Triggers timeout

60 Triggers timeout

INFinite Triggers timeout

Sets trigger offset 0

-5000

50000

-5000

50000

TRIGGER OFFSET

offset

Results:

-5000 <= NUM_VAL <= 50000

Sets trigger count 1

TRIGGER COUNT

count

Results:

1 <= NUM_VAL <= 100

Sets trigger timeout

0.001 sec.

60 sec.

infinite

INFINITE

4.00 / 07-2004 5-15

Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

MIN Triggers timeout

* DEFault Trigger timeout

MAX Trigger timeout 60

DISPlay Sets LCD to

:PULSe :TRIGger :TIMeout? <CHAR_VAL> Queries trigger

MIN INFINITE

DEFault INFINITE

MAX 60.00

:PULSe :SAMPle :INTerval <CHAR_VAL> or

<NUM_VAL>

1.0E-5 Sample interval

1 Sample interval

MIN Sample interval

* DEFault Sample interval

MAX Sample interval

DISPlay Sets LCD to

:PULSe :SAMPle :INTerval? <CHAR_VAL> Queries sample

MIN 1E -5

DEFault 1E -3

MAX 1.00

infinite

TRIGGER TIMEOUT

timeout

Results:

0 <= NUM_VAL <= 60

Sets sample interval

0.01 msec.

1 sec.

0.01 msec.

1 msec.

1 sec.

SAMPLE INTERVAL

interval

Results:

1E-5 <= NUM_VAL <= 1

1.0E-3

5-16 4.00 / 07-2004

IEEE Commands Power Supply NGMO

5.5 SOURCE command summary

Com-

Parameter Par. value Description Def. SCPI

mand

:SOURce [:A] Channel A /

:SOURce [1]

:SOURce :B Channel B /

:SOURce2 Channel B /

:VOLTage :PROTec-

* DEFault 22 Volt

:VOLTage :PROTec-

:VOLTage :MAXSet-

* DEFault 15 Volt

:VOLTage :MAXSet-

tion

tion?

:STATe? Queries VPT

tion

ting

ting?

<CHAR_VAL> or <NUM_VAL>

1.5 1.5 Volt

22 22 Volt

MIN 1.5 Volt

MAX 22 Volt

DISPlay Sets LCD to

<CHAR_VAL> Queries VPT

MIN 0.00

DEFault 2.0

MAX 10.0

<CHAR_VAL> or <NUM_VAL>

0.00 0 Volt

15.00 15 Volt

MIN 0 Volt

MAX 15 Volt

DISPlay Sets LCD to

<CHAR_VAL> Queries max.

Channel 1

Channel A / Channel 1

Channel 2

Sets VPT offset in 100mV steps

VOLTAGE PROTECTION

offset

Results:

0.0 <= NUM_VAL <= 10.0

state

Results:

0 -> not triggered

1 -> triggered

Sets max. settable output voltage

Maximum output voltage

settable output voltage

Results:

0.000 <= NUM_VAL <=

15.000

2.0

4.00 / 07-2004 5-17

Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

MIN 0

DEFault 15

MAX 15

:VOLTage [:LEVel] [:IMMedi-

ate]

* DEFault 0 Volt

:VOLTage [:LEVel] [:IMMedi-

ate]

:CURRent [:LIMit] [:VALue] <CHAR_VAL> or

* DEFault 2.000A

:CURRent [:LIMit] [:VALue]? <CHAR_VAL> Queries current

:CURRent [:LIMit] :MAXSet-

ting

* DEFault 5.000A

[:AMPLitude]

[:AMPLitude]?

<CHAR_VAL> or <NUM_VAL>

0.000 0 Volt

15.000 15 Volt

MIN 0 Volt

MAX 15 Volt

DISPlay Sets LCD to main

<CHAR_VAL> Queries voltage

MIN 0

DEFault 0

MAX 15

<NUM_VAL>

0.000 0.000A

5.000 5.000A

MIN 0.000A

MAX 5.000A

DISPlay Sets LCD to main

MIN 0

DEFault 5

MAX 5

<CHAR_VAL> or <NUM_VAL>

0.000 0.000A

5.000 5.000A

MIN 0.000A

MAX 5.000A

Sets voltage amplitude in 1 mV steps

display

amplitude

Results:

0.000 <= NUM_VAL <=

15.000

Sets current limit in Amps (max.

2.5A on voltages above 5V)

display

limit

Results:

0.000 <= NUM_VAL <=

5.000

Sets maximum settable current limit

5-18 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

DISPlay Sets LCD to:

:CURRent [:LIMit] :MAXSet-

ing?

:CURRent [:LIMit] :TYPE <CHAR_VAL> Sets current limit

* DEFault Limit

:CURRent [:LIMit] :TYPE? <CHAR_VAL> Queries current

:CURRent [:LIMit] :STATe? Queries current

<CHAR_VAL> Queries max.

MIN 0

DEFault 5

MAX 5

LIMit Limit

TRIP Trip

MIN Limit

MAX trip

DISPlay Sets LCD to:

MIN LIMIT

DEFault LIMIT

MAX TRIP

Maximum output current

settable current limit

Results:

0.000 <= NUM_VAL <= 5.000

type

Main display

limit type

Results:

LIMIT

TRIP

limit state

Results:

1 -> in current limit or output tripped

0 -> not in LIMIT / TRIP

LIMIT

4.00 / 07-2004 5-19

Power Supply NGMO IEEE Commands

5.6 STATUS command summary

Com-

Parameter Par. value Description Def. SCPI

mand

:STATus General Status

:MEASurement

:OPERation

[:EVENt]? Read the

:ENABle <NUM_VAL> 0 to 32767 Program the

:ENABle? Read the

:CONDitio n?

[:EVENt]? Read the

:ENABle <NUM_VAL> 0 to 32767 Program the

:ENABle? Read the

commands

measurement event register. See status model structure for further information.

Results:

0 to 32767

measurement enable register. See status model structure for further information

measurement enable register

Results:

0 to 32767

Read the measurement condition register. See status model structure for further information

Results:

0 to 32767

operation event register. See status model structure for further information

Results:

0 to 32767

operation enable register. See status model structure for further information

Results:

0 to 32767

5-20 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Command

Parameter Par. value Description Def. SCPI

:OPERation

:QUEStionable

:PRESet Returns status

:CONDition?

[:EVENt]? Read the

:ENABle <NUM_VAL> 0 to 32767 Program the

:ENABle? Read the

:CONDition?

Read the operation condition register.See status model structure for further information

Results:

0 to 32767

questionable event register. See status model structure for further information

Results:

0 to 32767

questionable enable register. See status model structure for further information

Results:

0 to 32767

Read the questionable condition register. See status model structure for further information

Results:

0 to 32767

registers to default states

Results:

none

4.00 / 07-2004 5-21

Power Supply NGMO IEEE Commands

5.7 CONFIG command summary

Com-

Parameter Par. value Description Def. SCPI

mand

:CONFig [:A] Channel A /

:CONFig [1]

:CONFig :B Channel B /

:CONFig2 Channel B /

:CURRent :LIMit :BEEP <CHAR_VAL> Beep on current

OFF Off

ON On

MIN Off

* DEFault Off

MAX On

DISPlay Sets LCD to: Beep

:CURRent :LIMit :BEEP? <CHAR_VAL> Queries current

MIN OFF

DEFault OFF

MAX ON

:CONFig [:A]

:COMMon :OUTPut :ONOFf <CHAR_VAL> Sets output

OFF Off

ON On

MIN Off

* DEFault Off

MAX On

DISPlay sets LCD to:

:COMMon :OUTPut :ONOFf? <CHAR_VAL> Queries common

MIN OFF

DEFault OFF

MAX ON

Channel 1

Channel A / Channel 1

Channel 2

limit

on current limit

limit beep

Results:

OFF

ON/OFF key to common for boths channels

Common output on/off

ON/OFF key function

OFF

5-22 4.00 / 07-2004

IEEE Commands Power Supply NGMO

5.8 SYSTEM command summary

Com-

Parameter Par. value Description Def. SCPI

mand

:SYSTem :POSetup <CHAR_VAL> or

<NUM_VAL>

0 Factory settings

1 First user-saved

9 Ninth user-saved

* 10 Last front panel

RST Factory settings

SAV1 First user-saved

SAV2 2

SAV3 3

SAV4 4

SAV5 5

SAV6 6

SAV7 7

SAV8 8

SAV9 Ninth user-saved

LASTset Last front panel

:SYSTem :POSetup? <CHAR_VAL> Queries the

:SYSTem :ERRor? Read and clear

:SYSTem :VERSion? Queries SCPI

:SYSTem :PRESet Stop all

Selects default setting for power up

setting

setup

setting

setup

default setup for power up

Results:

RST

SAV1

SAV2

SAV3

SAV4

SAV5

SAV6

SAV7

SAV8

SAV9

oldest message in error queue

version level

measurements and Sets NGMO2 to factory defaults

LASTSET

4.00 / 07-2004 5-23

Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

:SYSTem :CLEar Clears the error

:SYSTem :COMM-

unicate

* DEFault Disable

:SYSTem :COMM-

unicate

:SYSTem :COMM-

unicate

* DEFault 9600 baud

:SYSTem :COMM-

unicate

:SERial :ENABle <CHAR_VAL> Enables or

OFF Disable

ON Enable

MIN Disable

MAX Enable

DISPlay Sets LCD to:

:SERial :ENABle? <CHAR_VAL> Queries serial

MIN OFF

DEFault OFF

MAX ON

:SERial :BAUD <CHAR_VAL> or

<NUM_VAL>

300 300 baud

600 600 baud

1.200 1200 baud

2.400 2400 baud

4.800 4800 baud

9.600 9600 baud

19.200 19200 baud

38.400 38400 baud

MIN 300 baud

MAX 38400 baud

DISPlay Sets LCD to:

:SERial :BAUD? <CHAR_VAL> Queries serial

queue

disables the serial interface

Serial Interface ON/OFF

interface enable ON/OFF state

Results:

OFF

Sets serial baud rate

Serial speed

baud rate

Results:

300

600

1200

2400

4800

9600

19200

OFF

9600

5-24 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

38400

MIN 300

DEFault 9600

MAX 38400

:SYSTem :COMM-

unicate

* DEFault 8 bits

:SYSTem :COMM-

unicate

:SYSTem :COMM-

unicate

* DEFault None

:SYSTem :COMM-

unicate

:SYSTem :COMM-

unicate

* DEFault 1 stopbits

:SERial :DATabits <CHAR_VAL> or

:SERial :DATabits

:SERial :PARity <CHAR_VAL> Sets serial parity NONE

:SERial :PARity? <CHAR_VAL> Queries serial

:SERial :STOPbits <CHAR_VAL> or

<NUM_VAL>

7 7 bits

8 8 bits

MIN 7 bits

MAX 8 bits

DISPlay Sets LCD to:

<CHAR_VAL> Queries serial

MIN 7

DEFault 8

MAX 8

NONE None

ODD Odd

EVEN Even

MIN None

MAX Even

DISPlay Sets LCD to:

MIN NONE

DEFault NONE

MAX EVEN

<NUM_VAL>

1 1 stopbits

2 2 stopbits

MIN 1 stopbits

Sets serial data length

Serial count of Databits

data length

Results:

Serial parity

parity

Results:

NONE

ODD

EVEN

Sets number of stopbits

4.00 / 07-2004 5-25

Power Supply NGMO IEEE Commands

Com-

Parameter Par. value Description Def. SCPI

mand

MAX 2 stopbits

DISPlay Sets LCD to:

:SYSTem :COMM-

unicate

:SYSTem :COMM-

unicate

* DEFault None

:SYSTem :COMM-

unicate

:SYSTem :COMM-

unicate

* DEFault Carriage return

:SYSTem :COMM-

unicate

:SERial :STOPbits

:SERial :HAND-

shake

:SERial :HAND-

shake?

:SERial :DELimiter <CHAR_VAL> Sets the serial

:SERial :DELimiter

<CHAR_VAL> Queries number

MIN 1

DEFault 1

MAX 2

<CHAR_VAL> Sets serial

NONE None

HARDware Hardware

XON Xon/xoff

MIN None

MAX Hardware

DISPlay Sets LCD to:

<CHAR_VAL> Queries serial

MIN NONE

DEFault NONE

MAX HARDWARE

CR Carriage return

LF Line feed

MIN Carriage return

MAX Carriage return

DISPlay Sets LCD to:

<CHAR_VAL> Queries the serial

MIN CR

DEFault CR

Serial count of stopbits

of stopbits

Results:

handshake mode

Serial Handshake

handshake mode

Results:

NONe

XON

HARDWARE

delimiter

Serial delimiter

delimiter

Results:

NONE

5-26 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

MAX LF

:SYSTem :COMM-

unicate

* DEFault Address nr. 05

:SYSTem :COMM-

unicate

:IEEe :ADDRess <CHAR_VAL> or

:IEEe :ADDRess

<NUM_VAL>

<CHAR_VAL> Queries the IEEE

Sets the IEEE address

1 Address nr. 01

30 Address nr. 30

MIN Address nr. 01

MAX Address nr. 30

DISPlay Sets LCD to:

IEEE Address

address

Results:

MIN 01

DEFault 05

MAX 30

4.00 / 07-2004 5-27

Power Supply NGMO IEEE Commands

5.9 Signal-oriented measurement-command sum-

mary

Com-

Parameter Par. value Description Def. SCPI

mand

:FETCh [:A]? Channel A /

:FETCh[1] ?

:FETCh :B? Channel B /

:FETCh2? Channel B /

:FETCh [:A] Channel A /

:FETCh[1] Channel A /

:FETCh :B Channel B /

:FETCh2 Channel B /

:ARRay? Returns the last

:READ [:A]? Channel A /

:READ[1]? Channel A /

:READ :B? Channel B /

:READ2? Channel B /

:READ [:A] Channel A /

:READ[1] Channel A /

:READ :B Channel B /

:READ2 Channel B /

:ARRay? Triggers and

Channel 1

Channel A / Channel 1

Channel 2

Returns the last triggered reading. Measuremode is taken from last "SENSe:FUNCtion" setting.

Channel 1

Channel 2

array of triggered readings. Return values are always sampling points.

Channel 1

Channel 2

Triggers and returns a reading. Measuremode is taken from last "SENSe:FUNCtion" setting

Channel 1

Channel 2

returns a array of readings. Return value are always sampling points.

5-28 4.00 / 07-2004

IEEE Commands Power Supply NGMO

Com-

Parameter Par. value Description Def. SCPI

mand

:MEASure [:A]? Channel A /

:MEASure [1]?

:MEASure :B? Channel B /

:MEASure 2?

:MEASure [:A] Channel A /

:MEASure[ 1]

:MEASure :B Channel B /

:MEASure 2

:AVERage?

:PEAK? .. for function

:MIN? .. for function MIN

:HIGH? .. for function

:LOW? .. for function

:RMS? .. for function RMS

:VOLTage [:DC]? .. for function

:CURRent [:DC]? .. for function

:DVM? .. for function DVM

Channel 1

Channel A / Channel 1

Channel 2

Channel B / Channel 2

Performs a READ. Measuremode is taken from last “SENSe:FUNCtion" setting

Channel 1

Channel A / Channel 1

Channel 2

Channel B / Channel 2

Take a READ on AVERage function and returns the measure result

PEAK

HIGH

LOW

VOLTAGE

CURRENT

4.00 / 07-2004 5-29

Power Supply NGMO IEEE Commands

5.10 Remote calibration command summary

Com-

Parameter Par. value Description Def. SCPI

mand

:CAL :ENTer :PROT :CODe <NUM_VAL> 1...99999999 Unlocks

:CAL :CHANge :PROT :CODe <NUM_VAL> 1...99999999 Sets new

:CAL [:A] Channel A /

:CAL[1] Channel A /

:CAL :B Channel B /

:CAL2 Channel B /

:STEP1 Sets output to

:STEP2 <NUM_VAL> 0-200 mV Reads Val from

:STEP3 <NUM_VAL> 14.000-

:STEP4 Turns on measure

:STEP5 <NUM_VAL> 0.800 to

:STEP6 Turns on measure

:STEP7 <NUM_VAL> 28.000 to

:STEP8 Turns on measure

:STEP9 <NUM_VAL> 2800.0 to

:DATE <NUM_VAL>,

<NUM_VAL>, <NUM_VAL>

:SAVE Save calibration

:CAL :LOCK Locks calibration

16.000V

1.200 Ohms

38.000 Ohms

3800.0 Ohms

YY, MM, DD Sets calibration

calibration code

Channel 1

Channel 2

50mV

external DVM

Reads Val from external DVM

voltage 5Volts

Enters exact value of 1 Ohm cal resistor and do 5 Volts, 5A Calibration

Voltage 15 Volts

Enters exact value of 33 Ohms cal resistor and do 15 Volts, 500 mA Calibration

Voltage 15 Volts

Enters exact value of 3 KOhms cal resistor and do 15 Volts, 5mA Calibration

data

2222

5-30 4.00 / 07-2004

Ordering Information Power Supply NGMO

6 Ordering Information

Pos.

No.

1 Service Manual for

2 NGMO1 Programmable Analyzer-DC-Power

3 NGMO2 Programmable Dual Analyzer-DC-

4 NGMO2-B0 Front Panel Output Connectors RSE Munich 192.1500.00

5 NGMO2-B1 19”-Adapter for one unit RSE Munich 192.1500.01

Name Part Supplier Part number

NGMO1 and NGMO2

The Service Manual provides the information necessary for calibration, fault finding and fault rectification on the NGMO.

Supply

Power Supply

Rohde & Schwarz, Cologne Department: 5 CE Phone: 49 (0)2203-51357

RSE Munich 192.1500.21

RSE Munich 192.1500.24

192.1500.82

6 NGMO2-B2 19”-Adapter for two units RSE Munich 192.1500.02

7 NGMO2-K10 R&S Current Sniffer Software RSE Munich 192.1500.04

4.00 / 07-2004 6-1

Power Supply NGMO Ordering Information

6-2 4.00 / 07-2004

Rohde&Schwarz NGMO1, NGMO2 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Instructions

Contents

Figures

1 Operator Information

1.1 Preface

1.2 NGMO-Versions

1.2.1 NGMO1

1.2.2 NGMO2

1.3 Purpose of the Handbook

1.4 Explanation of Symbols

1.5 Inspection

2 Safety

2.1 General

2.2 Safety Instructions

3 Unit Description

3.1 Introduction

3.2 Overview

3.2.1 Accessories

3.3 Specifications

3.4 Function Description

3.4.1 Communication

4 Operation

4.1 Operation Elements

4.2 Start Up

4.2.1 NGMO Line Power Connection and Power-up

4.2.2 Main Functions of the NGMO

4.2.3 Menu

4.2.3.1 How to Enter a Numerical Value Using the Variation Knob?

4.2.3.2 How to Enter a Numerical Value directly?

4.2.3.3 How to Change Settings in Menu Mode?

4.2.3.4 Menu Items

4.3 Test Connections

4.3.1 Remote Sense

4.3.2 Local sense

4.3.3 Output Impedance

4.4 Factory Defaults

4.5 Measurements

4.5.1 Reading back Voltage (V), Current (I), DVM

4.5.2 Dynamic Measurements

4.5.2.1 Trigger System

4.5.2.2 Pulse Analysing

4.6 Status Structure

4.6.1 Status Byte and SRQ

4.6.1.1 Status Register Sets

4.6.2 Queues

5 IEEE Commands

5.1 IEEE-488-2 common commands and queries

5.2 FORMAT command summary

5.4 SENSE command summary

5.5 SOURCE command summary

5.6 STATUS command summary

5.7 CONFIG command summary

5.8 SYSTEM command summary

5.10 Remote calibration command summary

6 Ordering Information