CIRCUIT DESIGN WA-TBT-03S User manual

OG_WA-TB-03S_v10e 1 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
Test board for WA-TX-03S, WA-RX-03S
WA-TBT-03S and WA-TBR-03S
Operation guide
Version 1.0 (May 2017)
CIRCUIT DESIGN, INC.,
7557-1 Hotaka, Azumino-city
Nagano 399-8303 JAPAN
Tel: + [phone]
Fax: + [phone]
e-mail: [email protected]
http://www.cdt21.com

OG_WA-TB-03S_v10e 2 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
CONTENTS
GENERAL DESCRIPTION AND FEATURES....................................2
TEST BOARD LAYOUT ....................................................................3
POWER SUPPLY......................................................………………...4
FREQUENCY SELECTION......................................................……..4
OTHER SETTINGS.................................................................……...5
CONNECTING THE MIC...................................................................6
CAUTION NOTICE…...…………………………………………………..7
DIMENSIONS……………………………………………………………..8
CIRCUIT DIAGRAM……………………………………………………...10
CAUTIONS & WARNINGS……………………………………………….12
REVISION HISTORY ........................................................................13
GENERAL DESCRIPTION & FEATURES
General description
This test board is developed to allow you to evaluate the performance of WA-TX-03-R and
WA-RX-03-R or WA-TX-03S and WA-RX-03S without any additional components.
The board consists of a DC/DC converter, LEDs, a battery case and a module.
WA-TBT-03S and WA-TBR-03S do not include modules WA-TX-03-R and WA-RX-03-R or
WA-TX-03S and WA-RX-03S. Please make sure to order them if needed.
Features
Mounted battery holder
Rotary switch for frequency selection
Audio input level adjust (TX)
Volume control (RX)
Microphone/audio input (3.5mm socket)
Audio / headphone output (3.5mm socket)
Audio cut off
RF Power selection (WA-TX-03S only)
Standby switch (Yellow)

OG_WA-TB-03S_v10e 3 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
TEST BOARD LAYOUT
WA-TBT-03S
WA-TBR-03S
Batteries: 2 xAAA, 1.5 V

OG_WA-TB-03S_v10e 4 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
POWER SUPPLY
WA-TBT-03S, 2 xAAA size, 1.5v
WA-TBR-03S, 2 xAAA size, 1.5v
FREQUENCY SELECTION
Select the frequency channel by using the rotary switches. Ensure they are the same on both the
WA-TBT-03S and WA-TBR-03S boards.
Channel
(Rotary switch)
Frequency (MHz)
0
Not available
1
863.125
2
863.250
3
863.375
4
863.500
5
863.625
6
863.750
7
863.875
8
864.000
9
864.125
A
864.250
B
864.375
C
864.500
D
864.625
E
864.750
F
864.875
Attention:
If there are more than 2 transmitters and 2 receivers operating in the same area, one must be
careful of third-order intermodulation interference. To avoid this, it is recommended to plan your
channel usage by using our calculation tool.
Details of the calculation tool and explanation of third-order intermodulation interference can be
found at: http://www.cdt21.com/resources/siryo6.asp
Channel select

OG_WA-TB-03S_v10e 5 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
OTHER SETTINGS
Standby Switch (STB / yellow)
Standby disables RF emission and puts
the module into standby.
TX: Module does not go into standby
during power shut off.
AUTO: During power OFF, the module
enters standby initially allowing a more
controlled power down cycle. This avoids
audio spikes heard at the receiver.
CENTER POS.: No function
RF power select (EUP)
Select RF power level.
H –High (10 mW)
L –Low (5 mW)
WA-TX-03S only.
The switch has no effect when using WA-TX-03-R
Mute level adjustment
This is the received RF
signal level threshold control.
If the RF falls below this
level, the audio output is
muted. The “AF ON” LED will
go out when the audio is
muted.
Rotate to adjust
audio output
volume.
Ch. not
available LED
Power switch
“AF ON” LED

OG_WA-TB-03S_v10e 6 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
CONNECTING THE MIC
You may use a 2 or 3-line condenser microphone or dynamic microphone. You must use 3.5mm
mono plug only.
A condenser microphone requires a power supply (phantom supply) to drive it. The WA-TBT-03S
board is able to supply this phantom power via the connector.
There are various microphone types available on the market, so please consult the microphone
datasheets and if necessary add solder to the three jumper locations as shown below. These
jumpers are labeled on the WA-TBT-03S board as 3JP, 2JP and AF JP.
Two / Three wire condenser microphone Dynamic microphone or audio signal
Apply solder to 3JP and AF JP Apply solder to AF JP as shown below

OG_WA-TB-03S_v10e 7 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
Caution notice
Adjacent channel interference
In some cases, audio maybe heard on the channels immediately either side of the used channel. This is due
to a strong level of RF being received and spilling onto the adjacent channel.

OG_WA-TB-03S_v10e 8 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
DIMENSIONS
WA-TBT-03S
863 MHz
EU
SW5 only
808 MHz
JP
SW5 & SW4
80
70
SW5
SW4

OG_WA-TB-03S_v10e 9 Circuit Design, Inc
OPERATION GUIDE
OPERATION GUIDE
WA-TBR-03S
863 MHz
EU
SW1 only
808 MHz
JP
SW1 & SW2
70
80
SW1
SW2

OG_WA-TB-03S_v10e 10 Circuit Design, Inc
OPERATION GUIDE
WA-TBT-03S