ENGLISH
ENGLISH
APPENDIX: NETWORK INTERFACE PIN MAP
The U4S and U4D receivers both have a 25–pin network interface located on the
rear panel. The interface will allow future monitoring and control of all receiver func-
tions, including audio level, RF level, and ‘’A/B” diversity indication, from a remote
location via an interface device. The table below identifies the signal output by each
pin on the connector. Contact you Shure dealer for addition information.
NOTE: Using any of the pins in the shaded area could result in system mal-
function or damage to your receiver.
Pin
Receiver 1
(Left)
Receiver 2
(Right)
Connection
Connection
Type
Impedance
Voltage
Range
1
Ground
Ground
Not
Applicable
0 V
2
Audio
Meter
Analog
Output
1.2 k
Ω
0–2 V
Typical
0–5 V
Maximum
3
RF Level B
Analog
Output
2.5 k
Ω
1–4 V
4
RF Level A
Analog
Output
2.5 k
Ω
1–4 V
5
Diversity B
Analog
Output
2 k
Ω
1–4 V
6
Diversity A
Analog
Output
2 k
Ω
1–4 V
7
Network In-
terrupt
Digital
Input
Not
Applicable
1–4 V
8
Network In-
terrupt
Digital
Output/Busy
Not
Applicable
1–4 V
9
Serial Data
Output
Digital
Output
Not
Applicable
1–4 V
10
Serial Data
Input
Digital
Input
Not
Applicable
1–4 V
11
5V
Not
Applicable
5 V
12
5V
Not
Applicable
5 V
13
5V
(indicates
unit is dual
channel)
Not
Applicable
1–4 V
14
Audio
Meter
Analog
Output
1.2 k
Ω
0–2 V
Typical
0–5 V
Maximum
15
RF Level B
Analog
Output
2.5 k
Ω
1–4 V
16
RF Level A
Analog
Output
2.5 k
Ω
1–4 V
Pin
Receiver 1
(Left)
Receiver 2
(Right)
Connection
Connection
Type
Impedance
Voltage
Range
17
Diversity B
Analog
Output
2 k
Ω
1–4 V
18
Diversity A
Analog
Output
2 k
Ω
1–4 V
19
Serial Clock
Digital
Input
Not
Applicable
1–4 V
20
Serial Clock
Digital
Input
Not
Applicable
1–4 V
21
Network
Interrupt
Digital
Input
Not
Applicable
1–4 V
22
Network
Interrupt
Digital
Output/Busy
Not
Applicable
1–4 V
23
Serial Data
Output
Digital
Output
Not
Applicable
1–4 V
24
Serial Data
Input
Digital
Input
Not
Applicable
1–4 V
25
Ground
Ground
Not
Applicable
0 V
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