OG_MU4-RS2IF_v10e Circuit Design, Inc.
5
OPERATION GUIDE
[04]
λ
/4 lead antenna
[05]4-mounting holes
[06]Initialize button
[07]Power LED
[08]Power switch
[09]Power terminal
[10]RS232 connector(D-Sub 9-pin)
[01]RX-LED
[02]TX-LED
[03]MU-4
RF
G
N
D
V
CC
R
X
D
CT
S
IN
I
R
X
M
DO
R
X
L
T
X
D
R
T
S
M
O
D
R
S
T
DI
T
X
L
MU
-
4
-
4
34
[01] RX-LED:
On when data is received.
[02] TX-LED:
On when data is transmitted.
[03] MU-4:
A low power serial data transmission modem.
[04]
λ/4 Lead antenna:
A λ/4 long lead antenna (ANT-LEA-01, ANT-RIG-01-R).
[05] Mounting holes:
3
Φ holes for mounting
[06] Initialize button:
Resets the MU-4 mounted on the MU4-RS2IF to the factory default settings. Follow the
procedure below.
1. Turn on the power while pressing the initialize button.
2. Turn off the power and on once again after a while (approx. 5 seconds).
[07] Power LED:
The LED comes on when the power switch is turned on.
[08] Power switch:
A power switch.
Check that the power terminal is connected before turing it on.
[09] Power terminal:
The connector for the power supply. Connect a 9 V battery with the battery snap provided.
* If you connect to a power supply other than a 9 V dry battery, ensure that it is DC +3.2 V to DC +12 V. Be sure to
connect the power supply with the correct polarity.
Add a noise filter to the power line.
[10] RS232C connector (D-Sub 9-pin socket):
A D-Sub 9-pin socket for RS232C. Connect the RS232C straight
cable provided. You can also supply power from the RS232C connector pin No.1. In this case, take the voltage drop
(approx. 0.6 V) due to the diodes into consideration. For details, refer to the circuit diagram.
2.1 Part Names and Functions
Chapter 2 The MU4-RS2 (MU-4 + MU4-RS2IF)
