Redwood RWC7100A User manual

RWC7100A
RF SHIELDING ENCLOSURE
Operation Manual
R211216_1.10

The information in this document is subject to change without notice and does not represent a commitment on the part of
RedwoodComm. Please visit redwoodcomm.com/Download for updates.
CONTENTS
I. Information 2
1.1. Warranty Policy 2
1.2. Key Features 3
1.3. Specifications 4
II. Operation 6
2.1. Identification of RWC7100A 6
2.2. Performance Test 7
2.2.1 How to Set up the Equipment Required for RF Shielding Effectiveness Test 7
2.2.2 Test Procedure 8
2.2.3 An Example Test Result of RF Shielding Effectiveness 9
2.3. Maintenance 10
2.3.1 Recommended Routine Maintenance and Method 10
2.3.2 Recommended EMI Gasket replacement Period 10
2.3.3 How to Replace EMI Gasket 11
III. IO Modules 12
3.1. Ordering Information 12
3.2. Example of ordering 14
Appendix 15
A.1. Performance of RWC8201A for LoRaWAN bands 15
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I. Information
1.1. Warranty Policy
RedwoodComm's RF Shielding Enclosure products are warranted for one year from the date of shipment under normal
use. During the warranty period, if it proves to be defective in its materials or workmanship, at RedwoodComm's opinion,
it will be repaired or replaced in accordance with the terms of this warranty.
The warranty covers manufacturing defects only. Consumable accessory items such as EMI foam gaskets, antenna and
cables are not included.
The liability of RedwoodComm (or its appointed maintenance agent) is limited to the cost of repair and/or replacement of
the product under warranty and invalidated in the following cases:
• If the defect is caused (howsoever) by misuse, neglect, tampering and/or incorrect adjustment.
• If unauthorized persons carry out any alterations and/or repairs.
• Where any ancillary equipment not furnished or recommended by RedwoodComm causes problems or damage that is
attached to or used in connection with the product.
• Where any additional parts/equipment that is not authorized by RedwoodComm was added and caused problems or
damage.
• If the serial number is missing on the product.
For warranty service or repair, customers must notify RedwoodComm of the defect before the expiration of the warranty
period and make suitable arrangements for the performance of service.
This warranty is valid only to the original purchaser of the product.
To obtain technical assistance or to book a service/repair for your product under warranty, please contact our customer
support. Our engineers (or agent) will support you through video calls, email, phone or in-person visit.
Contact Information
• Address: RedwoodComm Co., Ltd.
#14008, OfficeSection Bld, SK M-city, 195, Baengma-ro, ilsandong-gu, Goyang-si, Gyeonggi-do, Korea
• Tel: [phone]
• email: [e-mail] or [e-mail]
• Online: www.redwoodcomm.com
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1.2. Key Features
The RWC7100A RF shielding enclosure offers excellent shielding effectiveness of over 100dB within a wide operating
frequency range of 400MHz to 6400MHz, so that the effects of external interference are reduced to a minimum.
In all interior workspaces, absorber material is attached in order to minimize RF reflections.
Users can utilize the three I/O panels differently depending on the purpose of use, and can order a standard I/O panel
(Module) or a separate customization panel.
To maintain lasting shielding effectiveness, users can order additional EMI gaskets and easily replace them when
necessary.
There are many kinds of wireless standards in various industries that require a strict level of shielding effectiveness.
In particular, this product is suitable for measuring radiation of various DUTs (devices under test) in development,
production line and QC applications where high accuracy is required as shown below.
LTE, NB-IoT devices (700MHz, 2-6GHz)
LoRa, Sigfox devices (400MHz, 900MHz, 2.4GHz)
WiFi devices (2.4GHz, 5.8-6.2GHz)
Bluetooth devices (2.4GHz)
GNSS devices(1.2-1.6GHz)
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1.3. Specifications
Shielding effectiveness
400MHz to 6.4GHz
≥100 dB
• Shielding effectiveness measurements taken with blank module panels mounted.
• For shielding effectiveness measurement data for each module, please refer to the 3.1 Ordering Information.
• For more detail on the test method, please refer to the 2.2. Performance Test.
• For details on maintaining the shielding effectiveness, please refer to the 2.3. Maintenance.
Dimensions and Weight
Dimensions, W x D x H mm (inches)
Interior (workspace)
260 x 190 x 100 (10.2” x 7.5” x 3.9”)
Exterior
355 x 270 x 185 (14.0” x 10.6” x 7.3”)
Weight
approx. 8.5 kg
Packing, W x D x H mm (inches)
Double packing size
450 x 350 x 270 (17.7” x 13.8” x 10.6”)
Weight
approx. 10.5 kg
(Weight and size may vary depending on the package)
Accessories list
Operating Manual
Test Report
For accessories according to other modules, please refer to the 3.1 Ordering Information.
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Environmental conditions
Temperature range
operating temperature range +20 °C to +30 °C
storage temperature range –10 °C to +50 °C
Damp heat
75 % relative humidity, non condensing at +10 °C to +30°C
• Refrain from using this equipment in a place subject to much vibration, direct sunlight, outdoor and where
the ground is not flat.
• If this product is not used for a long time, store it in a dry place away from direct sunlight, covered with vinyl or
placed in a cardboard box.
• If this product is left with the lid closed for a long time, the performance of the shield gasket may deteriorate.
Before using it again, be sure to open the lid and keep it open for at least one day, then check the shielding
effectiveness.
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II. Operation
2.1. Identification of RWC7100A
[Figure 2-1] Component Identification of RWC7100A
① 2 x M3 Hole (DP 5mm) : M3 screw holes for cable fixing
② N type Antenna Port : Additional RF port for RWC8201A antenna
③ Door (Lid) : Manual method to open/close the door from the top
④ 4 x M3 Hole (DP 8mm) : Mounting position for RWC8201A only
⑤ EMI Mesh Gasket : This detachable part is for obtaining optimal RF shielding.
⑥ 2set x EMI Foam Gasket : This detachable part is for obtaining optimal RF shielding.
⑦ Absorber : Absorbers are attached to minimize RF reflections.
⑧ Latch : Door latch handle
⑨ Hinge : Door Hinge
⑩ 4 x M4 Hole (DP5mm) : M4 screw holes for the enclosure fixing.
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2.2. Performance Test
This product is a precision RF Shielding Enclosure manufactured to be robust. Please refer to the test procedure for
shielding effectiveness below to ensure optimal performance at all times. This product may need calibration
depending on the number of uses and period of use. Please refer to the Maintenance section for more details.
This product may require maintenance depending on the number of the lid’s opening and closing and the period of
use. Please refer to the maintenance section for more details.
2.2.1 How to Set up the Equipment Required for RF Shielding Effectiveness Test
The following devices are required to check the shielding effectiveness.
- Signal generator : capable of generating 400M-6400MHz tone signal
- Signal generator side antenna : omni-directional one
- Signal power meter : A spectrum analyzer or equivalent device that can measure the tone power of a signal source
- Signal receiving side antenna(Reference) : A broadband antenna with high gain characteristics that can receive even
weak signals well
- RF signal amplifier : capable of sufficiently amplifying weak RF signals, if necessary
When measuring the shielding effectiveness of RWC7100A, it is recommended to install a signal generator with a
built-in battery inside RWC7100A, and perform the measurement outside of RWC7100A. If a signal is generated from
the outside and input through a cable, it is not guaranteed that the test results would be accurate.
Refer to Figure 2-2 for cable connections for testing.
[Figure 2-2] Test Setup with RWC7100A
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2.2.2 Test Procedure
1) Set up the source antenna with RWC1020A inside the RWC7100A to be located in the center.
2) Connect the spectrum analyzer and reference antenna with RF cable. (If necessary, use an adequate RF amplifier
together.)
3) Set up the spectrum analyzer as follows:
- Center Frequency: 400.1MHz (Change to 900.1MHz, 2400.1MHz, 5800.1MHz, respectively)
- Span: 500Hz
- Resolution BW: 4.7Hz (or Auto)
- Reference Level: 0dBm
- Scale 20 dB/div
4) Set up the signal generator or RWC1020A as follows:
- Frequency : 400.1MHz
- Power : +10dBm
5) Open the RWC7100A door and measure the power (Pref) moving the reference antenna to several points as
shown in Figure 2-3.
[Figure 2-3] Check the reference power level (Door Opened)
6) Close the RWC7100A door and measure the output power(Pmes) moving the reference antenna at the same
positions in step 5)
[Figure 2-4] Check the measure power level (Door Closed)
7) Calculate the Shielding Effectiveness Pse[dB] = Pmes[dBm] - Pref[dBm].
8) Change the signal generator to the next frequency and repeat the measurement process, step 3) to 7)
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2.2.3 An Example Test Result of RF Shielding Effectiveness
The product conformity test was measured using a method modified from the IEEE-STD-299.1 standard.
[Figure 2-5] Shielding effectiveness of RWC7100A
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2.3. Maintenance
This product is a precision RF Shielding Enclosure manufactured to be sturdy and robust. In order to ensure the optimal
performance of the product, periodic inspection is required according to the number of uses and period of use.
2.3.1 Recommended Routine Maintenance and Method
* Check to ensure that the Module, Hinge, and Latch screws are not loose and tighten if necessary.
* Check to ensure that the torque of the hinge mounted on the door has not weakened. The hinge has passed the
30,000 open-close private cycle test, but the torque may weaken as the number of openings and closings increases.
However, weakening of hinge torque does not affect the shielding effectiveness.
If the torque is weak, the lid could shut abruptly at a certain point, so please be careful as it may be hazardous. If
necessary, please contact customer support or an agent for replacement. It can be replaced by the customer, but
special attention and consultation are required as it may affect the shielding effectiveness.
* Check for damaged cable harnesses and replace them if necessary.
* Shielding performance may be greatly reduced if metal corrosion or oxidation progresses on the surface that the
gasket touches on the door or on the gasket frame. Clean thoroughly with alcohol and a soft cloth. It must be kept
clean at all times.
* Typically, the shielding effectiveness performance of new products has passed 10,000 open-closed private cycle
tests. However, it is recommended to replace the gasket if the shielding performance does not improve even after
regular maintenance has been performed.
* To maintain the shielding effect, refer to the performance test on page 7 2.2. Performance Test. It is recommended
to perform a test approximately every 5,000 times or at intervals of 6 months.
2.3.2 Recommended EMI Gasket replacement Period
* Generally, after opening and closing the door about 30,000 times, the gasket's contact surface may be damaged. In
this case, perform routine maintenance first, and if it does not improve, replace the gasket.
* Generally, long-term storage of the product with the door closed may affect the elasticity of the foam gasket to
decrease even if it is used less than the recommended number of lid openings and closings.
In this case, perform routine maintenance first and keep the door open for more than one day, and then perform
the performance test. If there is no improvement, replace the gasket.
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2.3.3 How to Replace EMI Gasket
[Figure 2-6] EMI Gasket replacement sequential number and part name
1) Order the O7100A-91 option for maintenance.
2) Remove all EMI gaskets already installed. (1st Mesh gasket, 2nd Foam gasket, 3rd Foam gasket)
3) Wipe the foreign substances on the surface that the gasket touches on the door or inside the gasket frame
thoroughly with alcohol and a soft cloth.
4) In the case of the 1st Mesh Gasket, place the seam in the center and insert it slowly with an even density.
5) In the case of the 2nd and 3rd Foam Gasket, refer to the picture above, remove the tape on the back of the gasket
and insert it into the gasket frame in the order of ① to ⑧
6) Visually inspect for excess RF gasket between the top door and gasket frame.
7) Check the shielding effectiveness by referring to the performance test method. Refer to page 9 for the
Performance Tests. If it is not normal even after replacement, please contact customer support.
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III. IO Modules
3.1. Ordering Information
Item
Descriptions
Order code
RWC7100A RF Shielding Enclosure
•Manual method to open/close the door from the top
•Select three IO modules based on user usage
C7100A-00
EMI Shielding Gasket Set for maintenance
•1 x Mesh Gasket is included
•2 x Foam Gaskets are included
•Installation guide sheet included
O7100A-91
O7100A-92: Wide-band Right Hand Circular Polarized (RHCP)
Antenna Set
O7100A-93: Wide-band Left Hand Circular Polarized (LHCP)
Antenna Set
•RWC8201A mounted on the lid of RWC7100A
•Antenna Dimensions (W x D x H mm): 130 x 130 x 15
•Frequency Range: 700MHz to 8.5GHz
•N(F) to SMA(F) Adaptor and RF cables installed
O7100A-92
O7100A-93
[Figure 3-1] Type A, IO Module mounted on the right side
Blank Module, Type A
•Outside dimensions (W x D mm): 135 x 85
5600-1000
USB 3.0 Fiber Interface Module, Type A
•Outside dimensions (W x D x H mm): 135 x 85 x 26
•IO Port: 1 x USB3.0 only (not backward compatible)
•IO Port: 1 x DC IN (V In: DC 5V to DC 17V)
•IO Port: 1 x DC Out(V Out=VIn), USB3.0 Out(USB Vout:5V3A)
•One 1 x DC 12V 3A Adapter included
•One USB 3.0 compatible cable included
5640-1000
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Customization Panel, Type A
•Outside dimensions (W x D mm): 135 x 85
•Additional customization panel to the use cases
5690-Axxx
[Figure 3-2] Type B, IO Module mounted on the left side
Blank Module, Type B
•Outside dimensions (W x D mm): 102 x 80
5600-2000
RF N Type Module, Type B
•Outside dimensions (W x D x H mm): 102 x 80 x 22
•Connector: 2 x N(F) outside to SMA(F) inside
• Unused RF ports must be covered with caps, and please use
shielded cables to ensure shielding effectiveness.
5630-1000
RF SMA Module, Type B
• Outside dimensions (W x D x H mm): 102 x 80 x 13
• Connector: 2 x SMA(F) outside to SMA(F) inside
• Unused RF ports must be covered with caps, and please use
shielded cables to ensure shielding effectiveness
5630-2000
D-Sub 9Pin Module, Type B
• Outside dimensions (W x D x H mm): 102 x 80 x 24
• DB 9P(M) outside to DB 9S(F) inside 5,000pF Pi Filter
• Unused ports must be covered with a cap, and please use
shielded cables to ensure shielding effectiveness
5640-2000
Customization Panel, Type B
•Outside dimensions (W x D mm): 102 x 80
•Additional customization panel to the use cases
5690-Bxxx
Other accessories
IO USB 3.0 to 2.0/3.0 HUB
• Dimensions (W x D x H mm): 94 x 63 x 22
•IO Port: 1 x USB 3.0 to 1 x USB 2.0 and 3 x USB 3.0
•IO Port: 1 x DC IN (12V to 24V)
•1 x DC Plug to DC Plug cable included
•1 x USB A(M) to USB A(M) cable included
•This hub can be used inside the enclosure with the
5640-1000, and both USB 3.0 and USB 2.0 are available
5640-1100
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* When ordering, please refer to the Figure3-1, 3-2 below and select C7100A-0x with IO Modules.
* All IO modules are shipped after installation in the enclosure.
* Afterwards, if the customer wants to mount the new modules ordered separately, remove the already
installed module from the enclosure first, and check for foreign substances on the surface that the IO Module
touches and wipe clean with a soft cloth using alcohol. Then, complete the installation by tightening the
included hexagon bolts. (Please perform the 2.2. Performance Test after installation.)
3.2. Example of ordering
This is an example of how customers order the RWC7100A with IO Modules. For more information, please contact our
sales or distributor before placing an order.
Use case
Module Type
Order code
Type B (Left side)
Type A (Right side)
Blank Modules
●C7100A-0x
●5600-1000
●2 x 5600-2000
RF Modules
●C7100A-0x
●5600-1000
●5600-2000
●5630-1000 or 5630-2000
RF, D-Sub and USB
Interface
●C7100A-0x
●5630-1000 or 5630-2000
●5640-1000
●5640-1100 (Select if necessary)
●5640-2000
RF, D-Sub,USB and
Wide-band
Circular Antenna
●C7100A-0x
●5630-1000 or 5630-2000
●5640-1000
●5640-1100 (Select if necessary)
●5640-2000
●O7100A-92 or O7100A-93
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Appendix
A.1. Performance of RWC8201A for LoRaWAN bands
General Description
The recommended operating frequency of the RWC8201A antenna is 700MHz to 8500MHz. When measuring
LoRaWAN devices in RWC7100A Shield Enclosure equipped with RWC8201A antenna as an option, it is necessary
to measure even in the 400MHz band. Therefore, in this application note, the transfer function of the RWC8201A
antenna is measured not only in the 400 MHz band but also in the 900 MHz band. Especially, transfer function
between antennas in the 400-510 MHz and 860-960 MHz bands are dealt with in detail.
Antenna Transfer function
Considering the RWC8201A antenna as a LoRa DUT, place two RWC8201A antennas 7cm apart inside RWC7100A
as shown in Fig.A.1 and measure the transfer function (S21) using Network Analyzer. Through the S21 data, the
flatness and path loss in the band can be confirmed.
Fig.A.1 Test Condition
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Fig. A.2 Path Loss (400~510MHz) Fig. A.3 Path Loss (860~960MHz)
Table.A.1 Path Loss at each marker
Frequency
400MHz
425 MHz
450 MHz
485 MHz
510 MHz
Path Loss
-42.8 dB
-36.5 dB
-40.5 dB
-39.6 dB
-27.8 dB
Frequency
860 MHz
880 MHz
900 MHz
920 MHz
940 MHz
Path Loss
-22.5 dB
-22.8 dB
-22.4 dB
-20.9 dB
-20.7 dB
- In the 400MHz band, the path loss between RWC8201A antennas is about 40dB, and starting decreasing
from 490MHz, it becomes -27dB at 510MHz.
- In the 900MHz band, which is within the recommended frequency range of RWC8201A antenna, the path
loss is about -21dB and has a flatness of ±1dB within the band.
- Although the result shows that the loss is larger and the flatness is larger in the 400MHz band than in the
900MHz band, the RWC8201A antenna seems to be good enough to be used in the LoRa Test at the
400MHz band in RWC7100A.
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A.2. DB9 Module Pin map
Fig.A.4 DB9 Module Pin Map.
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