Overview
The STA-1M allows bridging any audio line, adjusting the gain, and driving a balanced or unbalanced line. The circuit design allows the input to accept either balanced or unbalanced signals, of either high or low impedance. This is an instrumentation type input stage which will amplify the differential input, regardless of ground reference. The output is capable of driving either high or low impedance loads, and the output may be connected either balanced or unbalanced.
RDL's SupplyFlex power input configuration is included in the STA-1M. The power supply input may be fed from a floating (not ground-referenced) 24 Vdc power source, from a bipolar power supply (+/ 12 Vdc or +/-15 Vdc) or from a ground-referenced 24 Vdc power supply.
Features:
- Single-Channel Audio Line Amplifier
- Balanced or Unbalanced Inputs and Outputs
- Bridge a Line to Avoid Loading
- High to Low Impedance Conversion
- Low to High Impedance Conversion
- Instrumentation Input to Isolate Ground Loops
- Precisely Match Audio Levels
- RDL® SupplyFlex™ Power Input Configuration
Specifications
- Input:10 kΩ balanced or unbalanced bridge
- Outputs (2):150 Ω balanced to drive low or high-Z; 75 Ω unbalanced
- Output Level:+4 dBu nominal, (adjustable; unbalanced output 6 dB below balanced line level)
- THD+N:< 0.05%
- Frequency Response:10 Hz to 20 kHz (±0.25 dB)
- Headroom above +4 dBu:> 18 dB
- CMRR:> 50 dB at full gain (50 to 120 Hz)
- Noise Below + 4dBu:< -75 dB
- Gain:Adjustable per chart below Input/Output Min Gain/Max Gain Unbal. / Balanced -7 dB / +14 dB Bal. / Balanced -7 dB / +14 dB Bal. / Unbalanced -14 dB / +7 dB Unbal. / Unbalanced -14 dB / +7 dB
- Ambient Operating Environment:0° C to 55° C
- Power Requirement:GROUND-REFERENCED or FLOATING, 24 Vdc @ 50 mA
- Package Type:Cardboard Box
- Package Dimensions:2 x 2 x 4 in.
- Shipping Weight:0.19 lbs.
RDL Three-Year Limited Warranty
Installation of these products by the Purchaser shall constitute Purchaser’s acknowledgement and acceptance of the terms and
conditions for sale and of this warranty, and shall constitute the Purchaser’s determination of the suitability of this product for the
Purchaser’s intended application. Radio Design Labs, Inc., also referred to as RDL®, warrants to the Purchaser that products
manufactured by RDL are free from defects in material and workmanship. This warranty applies to the period of three years from the date
of shipment, except for component parts or products purchased from other sources and supplied by RDL. Such component parts or
products bear only the warranty of the manufacturer thereof in effect at the time of shipment to the Purchaser. RDL will, without charge,
and after written notice has been received and acknowledged by RDL, repair an RDL product if proved to be defective according to the
usage of the trade, when such equipment is received by RDL at the location it designates with shipment costs prepaid by the Purchaser.
RDL shall not be liable for any expense whether for repairs, replacements, material, service, or otherwise, incurred by the Purchaser or
modifications made by the Purchaser to the product. No equipment shall be deemed defective if it shall fail to operate in a normal or
proper manner due to exposure to excessive moisture in the atmosphere, excessive temperature extremes, improper environmental
cleanliness, or any other environment not consistent with the principles of good engineering practice. In no event shall RDL have any
liability for consequential damage or expense directly or indirectly arising from the use of the products, or any inability to use it either
separately or in combination with other equipment or materials, or from any other cause, whether used in accordance with instructions or
not. This warranty is void if equipment is altered in any way by other than RDL. RDL products are NOT intended for use in life support
appliances, devices, or systems. Use of RDL products in such applications is done solely at the liability of the reseller/installer and/or end
user. RDL reserves the right to change design parameters and specifications at any time without notice. The performance measurements
reflect the products at the time of printing. This warranty is in lieu of all others, either expressed or implied. No representative is authorized
to assume for RDL any other liability in connection with RDL products.
