![background image](http://html.mh-extra.com/html/shure/beta-58a/beta-58a_user-manual_1261688019.webp)
19
English
Inputs and Outputs
UR1 Transmitter Audio Input
Connector:
4-Pin male mini connector (TA4M)
Input Configuration:
Unbalanced, active
Maximum Input Level:
(1 kHz, 1% THD)
+10 dBu (sensitivity 0 dB)
+20 dBu (sensitivity –10 dB)
TA4M Connector Pin
Assignments:
Pin 1: Ground
Pin 2: +5 Vdc bias
Pin 3: Audio, 200 k
Ω
Pin 4: Tied through active load (on main board)
to Ground.
(On instrument adapter cable, Pin 4 floats)
UR2 Transmitter Audio Input
Input Configuration:
Unbalanced, active
Actual Impedance:
>1 M
Ω
Maximum Input Level:
1 kHz, 1% THD
+4.8 dBu
UR1, UR1M Transmitter RF Output
Connector:
SMA
Actual Impedance:
50
Ω
Pin Assignments:
Shell = Ground
Center = Signal
Receiver Input
Antenna
Power
Connector Type:
BNC
IEC
Actual Impedance:
50
Ω
-
Nominal Input Level:
–95 to –30 dBm
100-240 VAC, 50/60 Hz
Maximum Input Level: –20 dBm
240 VAC, + 10%,
50/60 Hz
Pin Assignments:
Shell = Ground
Center = Signal
IEC Standard
Bias Voltage*
12 Vdc @ 150 mA
maximum
N/A
* For remote antenna amplifiers
Receiver Audio Output
Monitor (1/4”
Headphone)
1/4” Phone
XLR
Output
Configuration:
Unbalanced
mono, 1/4 inch
Impedance
Balanced
Electrically
Balanced
Actual Impedance:
50
Ω
200
Ω
200
Ω
(active
balanced)
(150
Ω
mic)
Maximum
Output Level:
1 Watt @ 63
Ω
+18 dBu
+24 dBu
(–6 dBu mic)
with 100 Hz
modulating tone
Pin Assignments:
Tip = Hot
Ring = Hot
Sleeve = Gnd
Tip = Hot
Ring = no signal
Sleeve = Gnd
1 = Ground
2 = Audio +
3 = Audio –
Phantom Power
Protection:
No
Yes
Yes
Computer/Network Interface
Ethernet
RJ45
RF Distribution Ports
RF IN
RF OUT
Connector Type
BNC
BNC
Vdc Bias
12 Vdc @ 150 mA
N/A
LEMO Connector
Connector
Connector
UR1M LEMO BOARD
Audio
Ground
Microphone Element
UR1M Transmitter Audio Input:
Connector:
4-Pin male mini connector (TA4M)
3-Pin female mini connector (LEMO
XRB.00.303)
Input Configuration:
Unbalanced, active
Maximum Input Level:
(1 kHz, 1% THD)
+5 dBu (sensitivity 0 dB)
+15 dBu (sensitivity –10 dB)
TA4M Connector Pin
Assignments:
Pin 1: Ground
Pin 2: +5 VDC bias
Pin 3: Audio, 200 kΩ
Pin 4: Tied through active load (on
main board) to ground.
(On instrument adapter cable, Pin 4
floats)
LEMO Connector Pin
Assignments:
Pin 1: Ground
Pin 2: +5 VDC bias
Pin 3: Audio
(8.2 kΩ between pin 2 and 3 audio,
internal to UR1M)
NOTE:
The RF distribution circuitry is activated only if connected to an RF input that
has 12 Vdc bias.
Each UR4+ RF antenna input port provides 12 Vdc bias @ 150 mA. The 12V dc
bias is present only when the UR4+ receiver is powered on. Therefore, if a cascaded
UR4+ Receiver is powered off, the RF signal will not appear in the UR4+ receivers
that follow the powered-off receiver.