Redwood RWC2020A User manual

RWC2020A Interference Generator
Operating Manual
Version 1.00 (ENG)
(RWC2020A FW Version 1.00)
June 2019

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Contents
I. General Information ......................................................................................................................................................2
1.1 Warranty.............................................................................................................................................................3
1.2 Safety Considerations .........................................................................................................................................4
1.2.1 Injury Precautions ....................................................................................................................................4
1.2.2 Product Damage Precautions....................................................................................................................4
1.2.3 Safety Symbols and Terms........................................................................................................................5
1.3 Contact Information............................................................................................................................................6
1.4 Key Features.......................................................................................................................................................7
1.5 Specifications......................................................................................................................................................9
1.6 Initial Inspection...............................................................................................................................................10
1.7 SMPS Adaptor..................................................................................................................................................11
1.8 Operating Environment.....................................................................................................................................12
II. Operation...................................................................................................................................................................13
2.1 Front Panel View ..............................................................................................................................................14
2.2 Rear Panel View................................................................................................................................................15
2.3 Main Screen......................................................................................................................................................16
2.3.1 Mode Switch..........................................................................................................................................16
2.3.2 LBT Channel Mode................................................................................................................................16
2.3.3 LBT Burst Mode ....................................................................................................................................18
2.3.4 Single-tone Mode...................................................................................................................................19
2.3.4 Dual-tone Mode .....................................................................................................................................20
2.4 Information Screen............................................................................................................................................23
2.5 Ethernet IP Setup ..............................................................................................................................................24
2.6 Firmware Upgrade............................................................................................................................................25
2.7 Remote Control Interface..................................................................................................................................28
III. Revision History.......................................................................................................................................................29

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I. General Information
This chapter covers specifications, key features, warranty, and safety consideration of
the Instrument.
1.1 Warranty
1.2 Safety Considerations
1.3 Contact Information
1.4 Key Features
1.5 Specifications
1.6 Initial Inspection
1.7 Power Requirement
1.8 Operating Environment

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1.1 Warranty
RedwoodComm Warrants that this product will be free from defects in materials and workmanship for a
period of two(2) years from the date of shipment. During the warranty period, RedwoodComm will, at its
option, either repair or replace products that prove to be defective.
For warranty service or repair, Customer must notify RedwoodComm of the defect before the expiration of
the warranty period and make suitable arrangements for the performance of service. Customer shall be
responsible for packaging and shipping the defective product to the service center designated by
RedwoodComm. Customer shall prepay shipping charge to RedwoodComm designated service center
and RedwoodComm shall pay shipping charge to return the product to customer. Customer is responsible
for all shipping charges including freight, taxes, and any other charge if the product is returned for service
to RedwoodComm, if customer is located outside of Korea.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate malignance by
buyer, buyer-supplied software or interfacing, unauthorized modification or misuse, accident or abnormal
conditions of operation.
RedwoodComm responsibility to repair or replace deductive products is the sole and exclusive remedy
provided to the customer for breach of this warranty. RedwoodComm will not be liable for any indirect,
special, incidental, or consequential damages irrespective of whether RedwoodComm has advance notice
of the possibility of such damages

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1.2 Safety Considerations
Review the following safety precautions to avoid injury and prevent damage to this product or any product
connected to it.
1.2.1 Injury Precautions
Use Proper Power Cord
To avoid fire hazard, use only the power cord specified for this product.
Avoid Electric Overload
To avoid electric shock or fire hazard, do not apply a voltage to a terminal that is specified beyond the
range.
Ground the Product
This product is grounded through the grounding conductor of the power cord. In case no ground is
available at the power outlet, it is recommended to provide a separate grounding path to the instrument by
connecting wire between the instrument ground terminal and an earth ground to avoid electric shock or
instrument damage. Before making connections to the input or output terminals of the product, ensure that
the product is properly grounded.
Do Not Operate Without Covers
To avoid electric shock or product damage, do not operate this product with protective covers removed.
Do Not Operate in Wet/Damp Conditions
To avoid injury or fire hazard, do not operate this product in wet or damp conditions.
Do not use in a manner not specified by the manufacturer
1.2.2 Product Damage Precautions
Use Proper Power Source

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Do not operate this product from a power source that applies more than the voltage specified. Main supply
voltage fluctuations do not to exceed ± 10% of the nominal voltage.
Provided Proper Ventilation
To prevent product overheating, provide proper ventilation.
Do Not Operate With Suspected Failures
If you there is damage to this product, have it inspected by qualified service personnel.
Environmental Conditions
Refrain from using this equipment in a place subject to much vibration, direct sunlight, outdoor and where
the flat is not level. Also, do not use it where the ambient temperature is outside 5 °C to 40 °C, and altitude
is more than 2000m. The maximum relative humidity is 80% for temperatures up to 31 °C decreasing
linearity to 50% relative humidity at 40 °C. Over voltage Installation Category II for mains supply. Pollution
Degree 2.
1.2.3 Safety Symbols and Terms
These terms may appear in this manual
WARNING: Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION: Caution statements identify conditions or practices that could result in damage to this product
or other property.

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1.3 Contact Information
The contact information of RedwoodComm is as follows:
Headquarters in Korea: [phone]
Branch office in Canada: [phone]
Technical Support: [e-mail]
Homepage: http://www.redwoodcomm.com

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1.4 Key Features
General Descriptions
RWC2020Ais an interference generator being capable to be used for the purpose of a wide
range of tests or measurements, e.g. the Listen Before Talk (LBT) test, the Gateway Non-
regression tests, the Intermodulation Immunity test and so on. RWC2020A shall be connected to
RWC5020Avia RS-232C for a remote control and setup of the full automation tests.
Key Features
Operating Modes
LBT Channel mode
- Generating up to 8 tones with different power levels.
LBT Burst mode
- Generating 8 tones with one power level, called Normal, and switching to the other power
level, called Burst, with a time interval.
Single-tone mode
- Generating a single tone with high-performance phase noise.
Dual-tone mode
- Generating dual tones of up to 20MHz spacing.
Test Capabilities in collaboration with RWC5020A
LBT Test
- RWC5020A will emulate a gateway including a network server and measure how an end-
device under test will use RF channels, while RWC2020Agenerates interference signals,
which can be set up for the LBT channel test or for the LBT burst test.
Gateway Non-regression Test
- Some of Gateway Non-regression tests, defined by Semtech™ and implemented by
RedwoodComm, require an interference signal for the tests, which must have high-
performance phase noise that can be accomplished in Single-tone mode.
Intermodulation Immunity Test
- Two continuous-wave signals can be generated with configurable frequency space to
emulate interference signals caused by intermodulation.

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PC Software
Control of RWC2020A is only provided via RWC5020A PC Application Software. Please
refer to RWC5020A PCApplication Software to see how the tests are performed using
RWC2020A.

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1.5 Specifications
Frequency
Range : 400MHz ~ 1000MHz
Resolution : 100Hz
Accuracy : ±2ppm/year @ operating temperature
Output Level
Range: -10dBm ~ -100dBm
Resolution : 0.1dB
Accuracy : ±1dB
RF Characteristics
Phase Noise (Single-tone mode) :
-103dBc@1kHz / -110dBc@10kHz / -110dBc@100kHz / -138dBc@1MHz
VSWR : Better than 1:1.5
Impedance : 50Ω
Remote Interface
RS-232C
Miscellaneous
Operating temperature : 5 ~ 40°C
Input : DC 12V, 3A
Dimension : 166(w) x 50(h) x 194(d) mm
Display : 2.81 inch OLED
Weight : 950g

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1.6 Initial Inspection
After the delivery of the product, damage to its exterior that may occur during the shipping process should
be inspected, then it should be carefully checked that all accessories are included as listed in the following
table:
NO. Item Code Item Specifications Q’ty
1 C2020A-00 RWC2020A Interference Generator 1
2 2020A00-8001 Manual 1
3 6016-0001-001 MF405, SMA(M) to SMA(M) Cable L:0.5m 2
4 6211-0002-001 SMA(F) to N(M) Adaptor 1
5 6210-0003-001 SMA(F) to RP-SMA(M) Adaptor 1
6 6112-0001-001 RJ45 Cross LAN Cable 2m 1
7 6115-0001-001 RS-232C, Data Cable 1.8m 1
8 6114-00XX-001 Power Cord 1
9 4150-0001-001 SMPS Adaptor 1
WARNING:If any damage to interior or exterior of the product is found, please stop using immediately for
safety and contact to the technical support.

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1.7 SMPS Adaptor
Items Specifications
Input
Output AC 100-240V, 50/60Hz, 1.0A DC 12V, 3A
CAUTION:If AC power is beyond the range of operation, the adaptor may malfunction or could be permanently
damaged. Main supply voltage fluctuations should be not to exceed ±10% of the nominal voltage.

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1.8 Operating Environment
Refrain from using this equipment in a place subject to much vibration, direct sunlight, outdoor and where
the flat is not level. Also, do not use it where the ambient temperature is outside 5 °C to 40 °C, and altitude
is more than 2000m.
The maximum relative humidity is 80% for temperatures up to 31 °C decreasing linearity to 50% relative
humidity at 40 °C. Over voltage Installation Category II for main supply. Pollution Degree 2.
The storage temperature range for this equipment is –20 °C to 70 °C. When this equipment is not used for
a long period of time, store it in a dry place away from direct sunlight, covered with vinyl or placed in a
cardboard box.

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II. Operation
This section describes the basic concepts and details of operating RWC2020A Interference
Generator. Understanding the basic concept of your RWC2020A may help you use it
effectively.
2.1 Front Panel View
2.2 Rear Panel View
2.3 Main Screen
2.4 Information Screen
2.5 Ethernet IP Setup
2.6 Firmware Upgrade
2.7 Remote Control Interface

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2.1 Front Panel View
Fig 2.1 RWC2020AFront Panel View
NO Items Names and Descriptions
1 2.81 inch OLED Display
2 Power Switch
3 RF OUT Connector
1
3
2

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2.2 Rear Panel View
Fig 2.2 RWC2020ARear Panel View
NO Items Names and Descriptions
1 RS-232C Interface
2 Ethernet Interface
3 Function Key
4 SD Card Slot
5 DC 12V/3A Power Input
1
4
5
2
3

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2.3 Main Screen
2.3.1 Mode Switch
RWC2020A Interference Generator has four operating modes: LBT channel mode, LBT burst mode,
single-tone mode, and dual-tone mode. It can be switched from one to another by changing OP_MODE in
parameter setup of RWC5020A, which shall be connected with an RS-232C cable. An example screen of
RWC5020A for controlling RWC2020Ais shown in Fig 2.3.
Fig 2.3RWC5020AScreen for Controlling RWC2020A
2.3.2 LBT Channel Mode
In LBT channel mode, different power offsets can be applied to each RF channel. According to the local
regulations, users can define their own test scenario by configuring power offsets and monitor the use of
the channels during the specified time.
(a) RF OFF state (b) RF ON state
Fig 2.4 LBT Channel Mode

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(a) Configuration 1 of 2
(b) Configuration 2 of 2
Fig 2.5LBT Channel Mode Control in RWC5020A
RF_OUT
This parameter controls the status of RF TX output.
PATH_LOSS
The path loss can be measured between the RF port of RWC2020A and the RF port of DUT via an RF
splitter. RWC2020A’s real output power will be increased by this value to compensate the path loss.
POWER
This parameter defines the reference power level to configure relative power levels with offsets.

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CH_POW_01 ~ 07
These parameters define the offset values for RF channels with respect to the reference power level.
2.3.3 LBT Burst Mode
In LBT burst mode, two different power levels can be applied to all RF channels with different time
intervals. One is called ‘Normal’ and the other ‘Burst’. The existence of burst signals can be simulated with
configurable power levels and time intervals.
(a) RF OFF state
(b) RF ON state – Normal (c) RF ON state – Burst
Fig 2.6LBT Burst Mode
Fig 2.7LBT Burst Mode Control in RWC5020A

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RF_OUT
This parameter controls the status of RF TX output.
PATH_LOSS
The path loss can be measured between the RF port of RWC2020A and the RF port of DUT via an RF
splitter. RWC2020A’s real output power will be increased by this value to compensate the path loss
NORMAL_POWER
This parameter defines the power level of normal state which will be applied to all channels.
NORMAL_TIME
This parameter defines the time interval of normal state to maintain the normal power level.
BURST_POWER
This parameter defines the power level of burst state which will be applied to all channels.
BURST_TIME
This parameter defines the time interval of burst state to maintain the burst power level.
2.3.4 Single-tone Mode
In single-tone mode, a continuous-wave signal can be generated which has phase noise of high
performance. This mode is applicable to a variety of interference immunity tests which requires an
interference signal of very low noise for sensitivity tests.
(a) RF OFF state (b) RF ON state
Fig 2.8 Single-tone Mode