This section provides an overview of the R&S NGL/NGM user documentation.
1.1Manuals
You find the documents on the R&S NGL/NGM product page at:
www.rohde-schwarz.com/product/ngl200
www.rohde-schwarz.com/product/ngm200
Getting Started
Introduces the R&S NGL/NGM power supply series and describes how to set up and
start working with the instrument. The printed document is delivered with the instrument.
Documentation Overview
Manuals
User manual
Contains the description of all instrument modes and functions. It also provides an
introduction to remote control, a complete description of the remote control commands
with programming examples, and information on maintenance and instrument interfaces. Includes the contents of the getting started manual.
The online version of the user manual provides the complete contents for immediate
display on the internet.
Basic safety instructions
Contains safety instructions, operating conditions and further important information.
The printed document is delivered with the instrument.
Instrument security procedures manual
Deals with security issues when working with the R&S NGL/NGM in secure areas.
Service manual
Describes the performance test for checking the rated specifications, module replacement and repair, firmware update, troubleshooting and fault elimination, and contains
mechanical drawings and spare part lists. The service manual is available for registered users on the global Rohde & Schwarz information system (GLORIS, https://
gloris.rohde-schwarz.com).
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1.2Data Sheet
The datasheet contains the technical specifications of the R&S NGL/NGM power supply series. It also lists all options with their order numbers and accessories.
See www.rohde-schwarz.com/brochure-datasheet/ngl200
See www.rohde-schwarz.com/brochure-datasheet/ngm200
1.3Release Notes, Open Source Acknowledgment
The release notes list new features, improvements and known issues of the current
firmware version, and describe the firmware installation. The open source acknowledgment document provides verbatim license texts of the used open source software. It
can also be read directly on the instrument.
See www.rohde-schwarz.com/firmware/ngl200.
Documentation Overview
Application Notes, Application Cards, Videos
See www.rohde-schwarz.com/firmware/ngm200.
1.4Application Notes, Application Cards, Videos
These documents contain information about possible applications and background
information on various topics,
See www.rohde-schwarz.com/appnotes/ngl.
See www.rohde-schwarz.com/appnotes/ngm.
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2Welcome to R&S NGL/NGM
The one or two-channel power supply series are based on a classical transformer concept with linear regulators. This concept allows the instrument to achieve highest accuracy and lowest residual ripple.
The R&S NGL/NGM power supply series feature galvanically isolated, floating overload and short-circuit proof outputs. When multiple channels are connected in parallel,
higher currents can be achieved. When connected in serial, higher voltages are achievable.
Multi-purpose protection functions are available for each channel which you can set
separately, such as overcurrent protection (OCP), overvoltage protection (OVP) and
overpower protection (OPP). If such a limit is reached, the affected output channel is
automatically turned off and an indicator icon (
case of two-channel power supply (NGL202, NGM202), the overcurrent protection can
be linked to the other channel. In this case, the linked channel is turned off when the
other channel reaches a limit.
Welcome to R&S NGL/NGM
, , ) blinks on the display. In the
Additionally, the R&S NGL/NGM is protected with overtemperature protection (OTP).
This safety feature protects the R&S NGL/NGM from overheating. When the temperature in the power supply exceeds the OTP limit, the channel outputs are automatically
cut off.
The Arbitrary function allows a freely definable voltage and current sequences with a
timeframe as short as 1 ms. It allows varying the voltage or current during a test
sequence, for example to simulate different charging conditions of a battery. With
"Ramp" function, the R&S NGL/NGM provides the operating condition to ramp up the
supply voltage within a defined timeframe of 10 ms to 10 s.
All R&S NGL/NGM power supplies are equipped with a color TFT display (800 pixels x
480 pixels) and enhanced with touch input capability. The R&S NGL/NGM comes with
a USB and LAN (LXI) interface. Equipped with a wireless LAN (WLAN) option, you can
establish a network connection wirelessly.
The digital I/O interface installed at the rear panel is activated with an option, it allows a
single trigger-in signal to control multi trigger-out signals on the power supply, providing
many possibilities to control outputs and associated devices in the event when a trigger
occurs.
The user manual contains description of the functionalities that the instrument provides. The latest version is available for download at the product homepage (http://
www.rohde-schwarz.com/product/ngl200 for R&S NGL and http://www.rohdeschwarz.com/product/ngm200 for R&S NGM) .
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3Important Notes
3.1Symbols
Important Notes
Ambient Conditions
Caution, general danger zone
Ground
PE terminal
ON (supply voltage)
OFF (supply voltage)
Ground terminal
3.2Ambient Conditions
The allowed operating temperature ranges from +5 °C to +40 °C (pollution category 2).
The maximum relative humidity (without condensation) is at 80 %.
During storage and transport, the temperature must be between -40 °C and +70 °C. In
case of condensation during transportation or storage, the instrument requires approximately two hours to dry and reach the appropriate temperature prior to operation. The
instrument is designed for use in a clean and dry indoor environment. Do not operate
with high dust and humidity levels, if danger of explosion exists or with aggressive
chemical agents.
Any operating position may be used; however adequate air circulation must be maintained. For continuous operation, a horizontal or inclined position (integrated stand) is
preferable.
Specifications with tolerance data apply after a warm-up period of at least 30 minutes
at a temperature of 23 °C (tolerance -3 °C / + 7 °C).
The heat produced inside the instrument is guided to the exterior via temperature-controlled fan. Each channel has multiple temperature sensors which check the heat generation in the instrument and control the fan speed.
It is necessary to ensure that there is sufficient space around the instrument sides for
heat exchange. If the temperature inside the instrument increases more than the
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allowed limit, overtemperature protection is triggered and the affected outputs are
switched off automatically.
Air circulation
Do not obstruct the ventilation holes!
3.3Measurement Categories
This instrument is designed for supplying power-on circuits that are only indirectly connected to the low voltage mains or not connected at all. The instrument is not intended
for measurements within the measurement categories II, III or IV; the maximum potential against earth generated by the user must not exceed 250 V peak in this application.
The following information refers solely to user safety. Other aspects, such as the maximum voltage, are described in the technical data and must also be observed.
Important Notes
Mains Voltage
The measurement categories refer to transients that are superimposed on the mains
voltage. Transients are short, very fast (steep) current and voltage variations which
may occur periodically and non-periodically. The level of potential transients increases
as the distance to the source of the low voltage installation decreases.
●
Measurement CAT IV: Measurements at the source of the low voltage installations
(e.g. meters)
●
Measurement CAT III: Measurements in building installations (e.g. power distribution installations, power switches, firmly installed sockets, firmly installed engines
etc.)
●
Measurement CAT II: Measurements on circuits electronically directly connected to
the mains (e.g. household appliances, power tools, etc.)
●
0 (instruments without measured measurement category): Other circuits that are
not connected directly to the mains
3.4Mains Voltage
The instrument uses 50 Hz / 60 Hz mains voltages ranging from 100 VAC, 115 VAC or
230 VAC (tolerance ± 10 %). Mains voltage must be set correctly by removing the fuse
holder and rotating until the correct voltage appears through the window and reinstalling the fuse holder. The input line fuse is accessible externally. Power socket and fuse
holder form a single unit.
You need to first disconnect the power cord from the connector before you can safely
replace the fuse (as long as the fuse holder is undamaged). Next, the fuse holder must
be pried out using a screwdriver. The starting point is a slot next to the contacts. The
fuse can then be forced out of its mounting and must be replaced with an identical fuse
(see information about the fuse type on the rear panel). The fuse holder is inserted
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against the spring pressure until it locks into place. The use of mended fuses or short
circuiting the fuse holder is prohibited. Resulting damages are not covered by the warranty.
Safe operation
If the instrument is not in use, it must be switched off at the mains switch for safety reasons.
3.5Limits
The R&S NGL/NGM is equipped with a protective overload feature. The protective
overload feature prevents damage to the instrument and is intended to protect against
a possible electrical shock. The maximum values for the instrument must not be exceeded. The protection limits are listed on the front panel of the R&S NGL/NGM to ensure
the safe operation of the instrument.
Important Notes
Limits
These protection limits must be adhered to:
SpecificationLimits
Maximum output voltage20.05 VDC
Maximum output current6.01 A (<= 6 V)
3.01 A (> 6 V)
Maximum voltage against earth250 V peak
Maximum counter-voltage (same polarity)22 V
Maximum reverse voltage (opposite polarity)0.5 V
Maximum reverse current sink current3.01 A
Power supply100 VAC, 115 VAC or 230 VAC (tolerance ± 10 %)
Frequency50 Hz / 60 Hz
Maximum power output120 W (NGL202, NGM202), 60 W (NGL201,
NGM201)
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4Getting Started
4.1Putting into Operation
This chapter describes how to set up the R&S NGL/NGM power supply series for the
first time.
Risk of injury due to disregarding safety information
Observe the information on appropriate operating conditions provided in the data sheet
to prevent personal injury or damage to the instrument. Read and observe the basic
safety instructions provided with the instrument, in addition to the safety instructions in
the following sections. In particular:
●
Do not open the instrument casing.
Getting Started
Putting into Operation
Risk of instrument damage due to inappropriate operating conditions
Specific operating conditions are required to ensure accurate measurements and to
avoid damage to the instrument. Observe the information on appropriate operating
conditions provided in the basic safety instructions and the instrument's data sheet.
Instrument damage caused by electrostatic discharge
Electrostatic discharge (ESD) can damage the electronic components of the instrument
and the device under test (DUT). Electrostatic discharge is most likely to occur when
you connect or disconnect a DUT or test fixture to the instrument's test ports. To prevent electrostatic discharge, use a wrist strap and cord and connect yourself to the
ground, or use a conductive floor mat and heel strap combination.
Risk of radio interference
This instrument is compliant with Class A of CISPR 32. In a residential environment,
this instrument may cause radio interference.
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Risk of instrument damage during operation
An unsuitable operating site or test setup can cause damage to the instrument and the
connected devices. Ensure the following operating conditions before you switch on the
instrument:
●
The instrument is dry and shows no sign of condensation
●
The instrument is positioned as described in Chapter 4.1.4.1, "Bench Operation",
on page 19
●
The ambient temperature does not exceed the range specified in the data sheet
●
Signal levels at the input connectors are all within the specified ranges
●
Signal outputs are correctly connected and not overloaded
EMI impact on measurement results
Electromagnetic interference (EMI) may affect the measurement results.
To suppress generated electromagnetic interference (EMI):
●
Use suitable shielded cables of high quality. For example, use double-shielded RF
and LAN cables.
●
Always terminate open cable ends.
●
Note the EMC classification in the data sheet.
Getting Started
Putting into Operation
4.1.1Safety
Recommendations on secure operation
The R&S NGL/NGM is designed to operate at local workplaces or in secured networks
(LAN). It should not be accessible from the internet, because of a potential security
risk, e.g. attackers could misuse or damage your device.
Please always install the latest firmware.
It is highly recommended that you work closely with your IT department or system
administrator to ensure compliance with your company policies when connecting devices to your company's network.
This instrument was built in compliance with DIN EN 61010-1, safety regulations for
electrical instruments, control units and Iaboratory equipment.
It has been tested and shipped from the plant in safe condition. It is also in compliance
with the regulations of the European standard EN 61010-1 and the international standard IEC 61010-1.
To maintain this condition and ensure safe operation, you must observe all instructions
and warnings given in this user manual. Casing, chassis and all measuring ports are
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connected to a protective earth conductor. The instrument is designed in compliance
with the regulations of protection class I.
For safety reasons, the instrument may only be operated with authorized safety sockets. The power cable must be plugged in before signal circuits may be connected.
Never use the product if the power cable is damaged. Check regularly if the power
cables are in perfect condition. Choose suitable protective measures and installation
types to ensure that the power cable cannot be damaged and that no harm is caused
by tripping hazards or from electric shock, for instance.
Risk of electric shock
It is prohibited to disconnect the earthed protective connection inside or outside of the
instrument!
If it is assumed that a safe operation is no longer possible, the instrument must be shut
down and secured against any unintended operation.
Getting Started
Putting into Operation
Safe operation can no longer be assumed when:
●
Instrument shows visible damage
●
Instrument includes loose parts
●
Instrument no longer functions properly
–After an extended period of storage under unfavorable conditions (e.g. out-
doors or in damp rooms)
–After rough handling during transport (e.g. packaging that does not meet the
minimum requirements by post office, railway or forwarding agency)
Exceeding the low voltage protection
Use insulated wires and not bare wires for the terminal connection.
It is assumed that only qualified and trained personnel service the power supplies and
the connected loads.
Before switching on the product, it must be ensured that the nominal voltage setting on
the product matches the nominal voltage of the AC supply network.
4.1.2Intended Operation
The instrument is intended only for use by personnel familiar with the potential risks of
measuring electrical quantities.
For safety reasons, the instrument may only be connected to properly installed wall
outlets. Separating the ground is prohibited.
The power cable must be inserted before signal circuits may be connected.
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Use only the power cable included in the delivery package. See "Delivery package"
on page 19.
Before each measurement, measuring cables must be inspected for damage and
replaced if necessary. Damaged or worn components can damage the instrument or
cause injury.
The instrument may be operated only under the operating conditions and in the positions specified by the manufacturer, without the product's ventilation being obstructed.
If the manufacturer’s specifications are not observed, this can result in electric shock,
fire and/or serious personal injury, and in some cases, death.
Applicable local or national safety regulations and rules for the prevention of accidents
must be observed in all work performed.
The instrument is designed for use in the following sectors: Industrial, residential, business and commercial areas and small businesses.
The instrument is designed for indoor use only. Before each measurement, you need
to verify at a known source if the instrument functions properly.
Getting Started
Putting into Operation
To disconnect from the mains, unplug the IEC socket on the back panel.
See Table 4-1 for the general data on the instrument specification. For more informa-
tion, see the instrument datasheet (P/N: 5216.1057.32).
Table 4-1: General data on instrument specification
General data
Mains nominal voltageAC 100 V / 115 V / 230 V (±10 %) 50 Hz to 60 Hz
Dimensions (W x H x D)222 mm x 97 mm x 436 mm (8.74" x 3.82" x 17.17")
WeightR&S NGL201
R&S NGM201
7.1 kg (15.65 lb)
7.2 kg (15.87 lb)
R&S NGL202
R&S NGM202
7.3 kg (16.09 lb)
7.4 kg (16.31 lb)
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4.1.3Unpacking and Checking the Instrument
Unpack the R&S NGL/NGM power supply carefully and check the content of the package.
●
Check the equipment for completeness using the delivery note and package contents list for the various items.
●
Check the instrument for any damage and loose parts. If there is any damage,
immediately contact the carrier who delivered the instrument.
Packing material
Retain the original packing material. If the instrument needs to be transported or shipped later, you can use the material to protect the control elements and connectors.
Risk of damage during transportation and shipment
Insufficient protection against mechanical and electrostatic effects during transportation
and shipment can damage the instrument.
●
Always ensure that sufficient mechanical and electrostatic protections are provided
●
When shipping an instrument, the original packaging should be used. If you do not
have the original packaging, use sufficient padding to prevent the instrument from
moving around inside the box. Pack the instrument in antistatic wrap to protect it
from electrostatic charging
●
Secure the instrument to prevent any movement and other mechanical effects during transportation
Getting Started
Putting into Operation
Delivery package
The package contents contain the following items:
●
R&S NGL power supply or R&S NGM power supply
●
Four power cables
●
One printed Getting Started manual
●
One document folder containing a printed Basic Safety Instructions guide
4.1.4Setting Up the Instrument
The R&S NGL/NGM is designed for benchtop and rackmount operation.
4.1.4.1Bench Operation
On a benchtop, the R&S NGL/NGM power supply can either lie flat or stand on its feet.
As shown in Figure 4-1, feet on the bottom can be folded out to set the instrument in
an inclined position.
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Figure 4-1: Operating positions
Positioning of instrument
The instrument must be positioned in a manner that allows you to disconnect the unit
from the mains at any time and without restrictions.
4.1.4.2Rack Mounting
The instrument can be installed in a 19" rack using the rack adapter R&S HZN96 (P/N
3638.7813.02). Proceed according to the installation instructions supplied with the rack
adapter.
Getting Started
Instrument Tour
Ambient temperature
Place the R&S NGL/NGM power supply in an area where the ambient temperature is
within +5 °C to +40 °C. The R&S NGL/NGM power supply is fan-cooled and must be
installed with sufficient space along the sides to ensure free flow of air.
4.2Instrument Tour
This chapter provides an overview of all the controls available in the R&S NGL/NGM
models and steps to switch on the instrument for the first time.
●Overview of Controls...............................................................................................20
●Switching On the Instrument...................................................................................24
4.2.1Overview of Controls
4.2.1.1Front Panel
The front panel of the R&S NGL/NGM is as shown in Figure 4-2. The function keys and
navigation controls are located beside the display. The various connectors are located
at the right side of the display.
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R&S®NGL200/NGM200
The R&S NGL/NGM has one output channel for NGL201, NGM201 models and two
output channels for NGL202, NGM202 models.
Figure 4-2: Front panel of R&S NGL/NGM with 2 channels
1 = Display with touch screen
2 = Menu control keys
3 = Rotary knob and back key
4 = Output and channel keys
5 = Output terminals (one channel with sense for NGL201, NGM201; two channels for NGL202, NGM202)
6 = USB connector
7 = Power key
Getting Started
Instrument Tour
Display (1)
The display is a color TFT touch screen. Depending on the instrument model, up to two
channels are shown on the display. The respective measurement settings and functions are displayed in the individual channel display area. There is a status bar in the
device level and channel level, showing the device operating mode and respective
channel settings of the instrument.
For a detailed description on-screen layout, see Chapter 5.1, "Display Overview",
on page 29.
Menu control keys (2)
The menu control keys allow you to access the home window, device/channel menu
window and user key in the instrument.
For a detailed description on menu control keys, see Chapter 5.3.1, "Menu Controls",
on page 37.
Rotary knob and back key (3)
The rotary knob and back key are used for menu navigation and value adjustment in
the instrument.
For a detailed description on rotary knob and back key, see section Chapter 5.3.2,
"Navigation Controls", on page 40.
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Output and channel keys (4)
The channel key allows you to select the power supply channel to source or sink
power. The output key allows you to enable or disable the output power on the channel
key.
Refer to datasheet for the channel voltage/current limits in the source and sink mode.
Output terminals (5)
Depending on the instrument type, one or two output channels are available to source
or sink power.
Both instrument models are equipped with 4 terminals. The NGL201, NGM201 models
provide both the output plus the sense connectors at the front panel while the NGL202,
NGM202 models provide only output terminals for both channels.
USB connector (6)
The USB connector is a Type-A connector. You can connect a USB flash drive to this
connector to perform a firmware update, store logging data or screen shots.
Getting Started
Instrument Tour
Power key (7)
The [Power] key switches the instrument on and off.
4.2.1.2Rear Panel
Figure 4-3 shows the rear panel of the R&S NGL/NGM with its connectors.
Figure 4-3: Rear panel of R&S
NGL/NGM with 2 channels
8 = AC inlet with fuse holder and voltage selector
9 = Channel 1 rear panel connector for NGL202, NGM202 models. The two D.n.c. labels for NGM201 are
labeled as DVM+ and DVM-
10 = Channel 2 rear panel connector for NGL202, NGM202 models. The two D.n.c. labels for NGM202 are
labeled as DVM+ and DVM11 = USB connector (device)
12 = USB connector (host)
AC inlet with fuse holder and voltage selector (8)
Main supply cord
Do not use detachable mains supply cord with inadequate rating.
The power cable must be plugged in before signal circuits can be connected. Do not
use the product if the power cable is damaged. See Chapter 4.2.2, "Switching On the
Instrument", on page 24 for more information.
The built-in voltage selector selects the mains voltage between 100 V, 115 V and 230
V. All voltage settings are using the same fuse rating.
Channel connectors (9, 10)
Getting Started
Instrument Tour
Output terminals
Either the output terminals at the front panel or those at the back panel can be used.
Using both terminals at the same time can cause instrument malfunction.
Digital voltmeter (DVM)
The DVM+ and DVM- pins on the channel connector are available only with R&S NGM
power supply series equipped with option R&S NGM-K104 (P/N: 3643.9927.02).
The channel connectors contain both output ("F+", "F-") and sense ("S+", "S-") connections. Connector for "Ch2" is only available in the NGL202, NGM202 models.
USB connectors (11, 12)
The USB host connector (Type-A) can be used for mass storage devices or an external
mouse like the USB connector at the front panel.
The USB device connector is a Type-B connector for remote control operation.
Ethernet connector (13)
10/100 Ethernet port for remote control operation via the local area network.
For a detailed description on the connection setup, see Chapter 6.16.1.1, "LAN Con-
nection", on page 85.
Option IEEE-488 (GPIB) interface (14)
An IEEE-488 (GPIB) interface can be ordered (NGL-B105 or NGM-B105). This interface is not user installable.
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Digital I/O connector (15)
The Digital I/O option (R&S NGL-K103 or R&S NGM-K103) must be installed for this
function to be available in the instrument.
The specified voltages are 0 V to 24 V for all output pins and 0 V to 15 V for all input
pins.
Figure 4-4: Digital I/O connector (female socket front view)
Table 4-2: Digital I/O pin layout
PinSignalDirectionPinSignalDirection
1*Inhibit Ch1IN9*Inhibit Ch2IN
2Ext. Trigger Ch1IN10Ext. Trigger Ch2IN
Getting Started
Instrument Tour
3Digital In1IN11Digital Output
4Digital Output Out1OUT12Digital Output
5 - 8Gnd-13 - 15Gnd-
* The inhibit signals can be used to turn off the outputs by a digital hardware signal.
Table 4-3: Inhibit signals
Signal namePinDescriptions
Inhibit Ch1Pin 1 of Digital I/O con-
nector
Inhibit Ch2Pin 9 of Digital I/O con-
nector
4.2.2Switching On the Instrument
Before switching on the instrument, check that all the instructions in the “Basic Safety
Instruction” brochure and safety measures in previous sections are observed. Also,
check if the value on the voltage selector corresponds to the mains voltage (100 V, 115
V or 230 V).
OUT
Fault
OUT
Out2
If the inhibit signal goes active, channel 1 output
is turned off.
The inhibit signal is low active (inverted logic).
If the inhibit signal goes active, channel 2 output
is turned off
The inhibit signal is low active (inverted logic).
Fuse rating
The R&S NGL/NGM uses the same fuse ratings for all mains voltages.
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To change power fuse / mains voltage setting:
1. Peel off the yellow label sticker on the AC inlet.
2. Release the latch of the fuse holder which is located at both side of the socket and
pull it out.
3. Pull out the removable part of the fuse holder.
4. Turn this removable part until the correct voltage label (100, 115 or 230) is dis-
played in the window of the holder.
5. Return the fuse holder to its position in the panel.
To switch on instrument:
1. Connect the power cable to the AC power connector on the rear panel of the
R&S NGL/NGM.
2. Connect the power cable to the socket outlet.
Getting Started
Trying Out the Instrument
3. Press [Power] key on the front panel.
The instrument performs a system check, boots the operating system, and starts
the R&S NGL/NGM firmware.
By default, all output channels are turned off when the instrument is switched on to
prevent connected loads from being damaged unintentionally.
During startup, the R&S NGL/NGM is loaded with the last saved instrument settings
from internal memory. See Chapter 6.15, "Store and Recall ", on page 81.
To switch off instrument:
1. Press [Power] key.
All current settings are saved to internal memory and the firmware shuts down.
2. Disconnect the AC power cable from the instrument.
4.3Trying Out the Instrument
This chapter describes some basic functions that you can perform with the R&S NGL/
NGM.
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Source and sink current
The R&S NGL/NGM power supply series are 2 quadrant power supplies which may
both source and sink current. When the voltage across the output terminal exceeds the
set voltage, current flows into the instrument. The default behavior "Auto" can be configured in output menu, see Chapter 6.2.3.4, "Output Mode", on page 51.
On the display, sink mode is shown as negative current. See also "CR mode"
on page 26.
4.3.1Setting the Output Voltage and Current
1. Press [Home] key.
The R&S NGL/NGM displays the home window.
2. Select voltage or current parameter in the home window.
The R&S NGL/NGM displays an on-screen keypad to set the value.
Getting Started
Trying Out the Instrument
3. Enter the required value.
4. Confirm value with the unit key (V/mV or A/mA).
See "Source and sink current"on page 26 for more information on the operating
modes supported in different models.
4.3.2Activating the Channels Output
The output voltages can be switched on or off regardless of the instrument's operating
mode.
To switch on or off channel output.
1. For the two-channel models, select desired channel key ([Ch1] or [Ch2]) on the
front panel.
2. Press [Output] key.
The R&S NGL/NGM outputs the set voltage level on the output channel terminal.
Depending on the operating mode which the channels are operated in, the following
are observed:
CR mode
CR mode is a special case of sink mode in which the instrument behaves like a constant resistor. Only in this mode, the respective channel keys and display font color in
the home window turns cyan.
In "normal" sink mode, the colors are the same as in source mode: green if the current
flowing into the R&S NGL/NGM is below the set current and red if the current is limited
to the set value. The only visible indication of sink mode is the change of sign of the
current readout to "Minus".
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Getting Started
Maintenance and Support
Color illuminated on front panel keys and display
font color of voltage and current in home window
Green
Red
Cyan
Also, the operating symbol mode (CV, CC or CR) is displayed at the channel status bar
of the respective channel.
4.4Maintenance and Support
4.4.1Maintenance
Operating mode
Constant voltage mode (CV)
Constant current mode (CC)
Constant resistance mode (CR)
Note: Instrument is operated in sink mode and
"Constant Resistance" is activated.
Regular maintenance improves the life span of the instrument, the following chapter
provides information on instrument maintenance.
Cleaning
Before cleaning the instrument, ensure that it has been switched off and the power
cable is disconnected.
Clean the outer case of the instrument at regular intervals, using a soft, lint-free dust
cloth.
Instrument damage caused by cleaning agents
Use a dry, lint-free cloth to clean the product. When cleaning, keep in mind that the
casing is not waterproof. Do not use any liquids for cleaning.
Cleaning agents, solvents (thinners, acetone), acids and bases can damage the front
panel labeling, plastic parts and display.
The display may only be cleaned with an appropriate glass cleaner. Rub the display
with a dry, clean and lint-free cloth. Do not allow cleaning fluid to enter the instrument.
27User Manual 1178.8736.02 ─ 09
R&S®NGL200/NGM200
4.4.2Contacting Customer Support
Technical support – where and when you need it
For quick, expert help with any Rohde & Schwarz product, contact our customer support center. A team of highly qualified engineers provides support and works with you
to find a solution to your query on any aspect of the operation, programming or applications of Rohde & Schwarz products.
Contact information
Contact our customer support center at www.rohde-schwarz.com/support, or follow this
QR code:
Getting Started
Maintenance and Support
Figure 4-5: QR code to the Rohde & Schwarz support page
28User Manual 1178.8736.02 ─ 09
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