OG_MU4-USBIF_v10e 5 Circuit Design, Inc.
OPERATION GUIDE
[07]
λ
/4 lead antenna
[09]Power LED
[01]USB-B type receptacle
[02]Initialize button
[03]RX-LED
[04]TX-LED
[05]MU-4
[06]Conversion board
[08]4-mounting holes
RF
G
N
D
V
CC
R
X
D
CT
S
IN
I
R
X
M
DO
R
X
L
T
XD
R
TS
M
O
D
R
S
T
DI
T
XL
MU
-
4
-
4
34
[01] USB-B receptacle:
For connecting the double shield USB cable (USB 2.0 High Speed).
[02] Initialize button:
Resets the MU-4 mounted on the MU4-USB to the factory default settings. Follow the
procedure below.
1. Turn on the power (connect the USB cable) while pressing the initialize button.
2. Release the initialize button and after turning off the power (remove the USB cable), turn the power again
(connect the USB cable) after a while (approx. 5 seconds).
[03] RX-LED:
On when data is received.
[04] TX-LED:
On when data is transmitted.
[05] MU-4:
A low power serial data transmission modem.
[06] Conversion board:
A board making it possible to fit the pins of the MU-4 into the USB board.
[07]
λ/4 lead antenna:
A λ/4 long lead antenna. (ANT-LEA-01, ANT-RIG-01-R)
[08] Mounting holes:
3
Φ holes for mounting
[09] Power LED:
The LED comes on when the USB cable is connected.
2.1 Part Names and Functions
Chapter 2 The MU4-USB (MU-4 + MU4-USBIF)
