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ULX1 Transmitter Output
Actual Impedance:
50 Ω
Nominal Output Level:
20 mW
Maximum Output Level:
30 mW
Pin Assignments:
Shell = Ground Center = Signal
ULX2 Transmitter Input
Input Conguration:
Unbalanced, active
Actual Impedance:
20 kΩ
Maximum Input Level:
10 Vp–p (12 dBV) for 1% THD at minimum gain setting using 1 kHz
signal.
ULX2 Transmitter Output
Actual Impedance:
50 Ω
Nominal Output Level:
20 mW
Maximum Output Level:
30 mW
Pin Assignments:
Shell = Ground Center = Signal
ULXS4 and ULXP4 Receiver Input
Connector: Antenna Power Input
Connector Type: BNC IEC 320
Actual Impedance:
50 Ω ––
Nominal Input Level:
–95 to –30 dBm 15 Vdc
Maximum Input Level:
+6 dBm (–20 dBm recommended) 18 Vdc
Pin Assignments:
Shell = Ground Center = Signal IEC Standard
Voltage for Remote Power:
12 Vdc, 150 mA maximum ––
ULXS4 and ULXP4 Receiver Output
Connector: High Z Audio Low Z Audio*
Output Conguration: Unbalanced (1/4 in.) Balanced (XLR)
Actual Impedance:
3 kΩ 22 Ω
Nominal Input Level:
–– ––
Pin Assignments:
Tip = Hot Ring/ Sleeve = Gnd 1 = Ground
2 = Hot
3 = Cold
Voltage/Current/Phantom
Power Protection?
Yes Yes
*Output Level: Microphone Level = Line Level – 20 dB
Transmitter Audio Polarity
Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces positive
voltage on pin 2 (with respect to pin 3 of low impedance output) and the tip of the high impedance 1/4-inch output
Transmitter Gain Adjustment Range
ULX1: 25 dB
ULX2: 25 dB
Receiver Audio Output Level (±38 kHz deviation, 1 kHz tone)
XLR connector (into 600 ohm load): +3.9 dBV (line), –17 dBV (mic)
1/4 inch connector (into 3000 ohm load): –2 dBV
Impedance
ULX1 (input): 1 Megohm ULXS4, ULXP4 (output): 50 ohms at line level; 2000 ohms at mic level
Modulation
±38 kHz deviation compressor-expander system with pre- and de-emphasis.
RF Power Output
ULX1, ULX2: 30 mW maximum
Dynamic Range
>100 dB, A-weighted
RF Sensitivity
1.26 μV for 12 dB SINAD (typical)
Image Rejection
80 dB typical
Spurious Rejection
75 dB typical