Radio Design Labs STP1
Dual Universal Attenuator

STP1

The STP-1 is part of a group of products in the STICK-ON series, designed by Radio Design Labs. The durable bottom adhesive permits quick, permanent or removable mounting nearly anywhere or it may be used with RDL’s racking accessories. The STP-1 is a convenient attenuator pad that can be located at the precise location that attenuation is needed without the normal unsightly twisted-resistor pads that are all so common.

Whether you need to reduce the input level to a machine to improve headroom, feed a line level signal into a mic level input, or simply lower the level of an audio line to match your systems standard levels, the STP-1 is the simple and economic answer. Use the STP-1 combined with other RDL RACK-UP®, STICK-ON, TX™, or FLAT-PAK™ series products as part of a complete audio/video system.

Applications:

• To reduce audio feed
• To feed audio into equipment
• To preset audio levels
• To precisely match audio levels
• To prevent input overload
• To increase audio input headroom
• Two adjustable attenuators in one package

Features:

• Permits precise calibration of all levels in youraudio system
• 2 attenuators provided in each STP-1
• Multi-turn trimmers for precise adjustment
• Very wide range of attenuation; from speaker levelinputs to mic outputs
• Operates with balanced or unbalanced inputs/outputs
• No lugs required for reliable connections
• Full operation in either high or low impedancecircuits
• Attenuator pads totally self-contained; no jumpers toselect or resistors to attach
• Quickly & efficiently attenuate any signal;cleanly, neatly, and with proper impedance match
• Recessed adjustment discourages tampering

Specifications:

• Circuit Type: Passive
• Attenuation:
       High Impedance Balanced Line:Adjustable -1 dB to -85 dB
       Low Impedance Balanced Line: Adjustable -5 dB to -35 dB
       High Impedance Unbalanced Line:Adjustable -1 dB to -85 dB
• Nominal Impedance: High Impedance 10 kohm; LowImpedance 600 ohm
• Adjustment: Screwdriver trimming adjustment, 15 turns continuous
• Circuit type: Passive modified (H) & (T) pads
• Connections:
       Terminal block accepts 14-30 gauge wire
       no lugs required
       input/output connection legend located on STP-1
• Maximum Signal Inputs:
       High Impedance Balanced Line: +33 dB, 35 V RMS
       Low Impedance Balanced Line: +27 dB; 18 V RMS
       High Impedance Unbalanced Line:+35 dB, 45 V RMS
• Reference Levels:
       Line level is +10 dB to -10dB
       Mic level is -45 dB to -65dB
       0 dB = 0.775 V RMS into specified load

Our Part #  STP1