Lectrosonics SRc-941 Instruction Manual
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Lectrosonics SRc-941 Instruction Manual

Camera slot dual uhf receiver
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SRc-941
Camera Slot Dual UHF Receiver
Featuring
Digital Hybrid Wireless
U.S. Patent 7,225,135
Quick Start Summary
The following checklist includes the minimum required
settings to start using the receiver.
• Install either a battery sled or camera slot adapter
kit (see pages 6-9).
• Connect power to the receiver (see pages 9-10, 13)
• Set the DIVMODE for single or dual channel opera-
tion (see pages 17, 19).
• Set the COMPAT (compatibility) mode for the trans-
mitters to be used (see page 20).
• Find clear operating frequencies for one or both
receivers (see pages 19 and 22).
• Set transmitters on the matching frequencies (see
transmitter manual).
Fill in for your records:
Serial Number:
Purchase Date:
Technology
®
• Verify transmitters are set to the same compatibility
• Adjust transmitter input gain to match voice level
• Adjust receiver output level as needed for the
INSTRUCTION MANUAL
mode as the receiver (see transmitter manual).
and mic position (see transmitter manual).
camera or mixer input level desired (see LEVEL on
page 19 and MIXTRIM/MIXMODE and TONE on
page 21).
IMPORTANT:
Performance will be degraded if
FREQ.
Receiver 2 is set 4.2 to 4.8 MHz higher
than Receiver 1. The LCD will also flash
WARNING
this message periodically.
Rio Rancho, NM, USA
www.lectrosonics.com

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Summary of Contents for Lectrosonics SRc-941

  • Page 1 INSTRUCTION MANUAL SRc-941 Camera Slot Dual UHF Receiver Featuring Digital Hybrid Wireless Technology ® U.S. Patent 7,225,135 Quick Start Summary The following checklist includes the minimum required settings to start using the receiver. • Install either a battery sled or camera slot adapter •...

  • Page 2: Table Of Contents

    SRc-941 Dual Receiver Table of Contents Digital Hybrid Wireless ® General Technical Description ..........3 The Lectrosonics Digital Hybrid Wireless uses innova- ® IF Amplifiers and SAW Filters ..........4 tive technology to combine the advantages of digital Digital Pulse Counting Detector ..........4 audio with the advantages of analog RF transmission.

  • Page 3: General Technical Description

    UHF Digital Hybrid Wireless ® General Technical Description SRC-941 DUAL RECEIVER Ant 1 248.450 MHz RF BLOCK DIAGRAM Mixer IF Amp Audio Rx IC Pulse Audio 1 Amp & 350 kHz Splitter Detector Filter 248.800 MHz RECEIVER 1 Window Detector...

  • Page 4: If Amplifiers And Saw Filters

    SRc-941 Dual Receiver IF Amplifiers and SAW Filters SmartSquelch ™ The first IF stage employs two SAW (surface acoustic A DSP-based algorithm called SmartSquelch optimizes wave) filters. The use of two filters significantly increas- the receiver performance in very weak signal conditions.

  • Page 5: Lcd Display

    UHF Digital Hybrid Wireless ® LCD Display Setup and monitoring is done through the LCD display on the control panel. The built-in backlight for view- ing in dimly lit environments can be set to remain on for 30 seconds, 5 minutes or to remain on constantly. The characters and background on the display can be inverted as desired for easy viewing in brightly or dimly lit environments.

  • Page 6: Front Panel Controls And Functions

    SRc-941 Dual Receiver Front Panel Controls and Functions Receiver 1 Receiver 2 MENU/SELECT Button UP Button DOWN Button IR Sync Port POWER/BACK Button Rear Panel Adapters Audio Outputs Audio outputs and the power inlet are located on the Several different panel adapters are available to config- rear panel, accessed by a variety of different adapters.

  • Page 7: Camera Slot Adapter Kits

    UHF Digital Hybrid Wireless ® Camera Slot Adapter KIts Adapters for Stand-Alone Use SRSUPER SREXT For stand-alone use, this kit includes a Adapter kit for rear panel with two Unislot camera ® TA3 male jacks for slots such as those the balanced out- provided on Ikega- puts and a power...

  • Page 8: Installing Adapters

    SRc-941 Dual Receiver Installing Adapters Installing Rear Panel Adapters Installation of the rear panel output/power adapters is SRSUPER Adapter the same for all models. Thread two short screws through the Panels are held in recessed tabs on the place by two phil-...

  • Page 9: Battery Adapters

    UHF Digital Hybrid Wireless ® Battery Adapters Installing the SRBATTSLED Battery sled adapters configure the receiver for stand- Orient the battery sled so that the PCB connectors will alone use or to provide battery backup power. Several mate when the sled is inserted. options are available: •...

  • Page 10: Sr9Vbp 9 Volt Battery Adapter

    SRc-941 Dual Receiver SR9VBP 9 Volt Battery Adapter SRSLEEVE mounting adapter This optional adapter is mounted onto the battery sled This sleeve is supplied with Velcro swatches for mount- for use as the primary power source or as a battery ing an SR Series receiver on a flat surface of camera, backup for an external power supply.
  • Page 11 (battery shown for illustration only; not sold by The clinch nuts in the foot and housing apply friction to Lectrosonics.) the threads to allow the foot to be rotated to the de- sired position, with the jam nut locking it in place. Use a wrench to rotate the foot, then tighten the jam nut to prevent the foot from rotating.

  • Page 12: Audio Output Cables And Connectors

    SRc-941 Dual Receiver Audio Output Cables and Connectors External Power Cables MCSRPT 21747 Locking LZR style plug 12 inch long TA3 female to to stripped and tinned; stripped and tinned wires 6 feet long. for balanced output. PIN 1: Shield...

  • Page 13: Mounting And Orientation

    UHF Digital Hybrid Wireless ® Mounting and Orientation AMJ Rev. A Jointed Antenna A variety of accessories are available to enable various mounting options. For maximum operating range, the antennas should be vertical and above the camera and The AMJ-944 Rev. A antenna is a general purpose other equipment.

  • Page 14: Pca900 Printed Circuit Antenna

    COAXIAL CABLE ZSC24 SPLITTER Use Lectrosonics P/N 21770 BNC (F) to SMA (M) adapter; Pomona P/N 4290 A “bendable” mounting strap is included that allows vertical orientation on a variety of surfaces. Several other adapters are also available for temporary or fixed installations.

  • Page 15: Lcd Main Window

    UHF Digital Hybrid Wireless ® LCD Main Window NOTE: When the RATIO DIVERSITY mode is Receiver 1 Receiver 2 Diversity Transmitter Activity Battery Level selected, both receivers are combined to pick up the same transmitter, so the Main Window will display a single audio channel.

  • Page 16: Navigating The Lcd

    SRc-941 Dual Receiver Navigating the LCD Main Window NOTE: Press the BACK Receiver 1 Hold MENU and Mute Audio on Hold MENU Pilot Tone press UP Receiver 1 and hold UP button from the Main ON\OFF momentarily for 1 sec. or...

  • Page 17: Main Window

    945.600 MHz. The frequency can also be set accord- ing to the hex code, which is usually easier to remem- DOWN ber. Lectrosonics transmitters with LCD interfaces allow frequency to be set in MHz or hex settings. BKLIGHT Dims after 5 minutes...

  • Page 18: Menu Item Descriptions

    SRc-941 Dual Receiver Menu Item Descriptions LEVEL IR SYNC This setup screen displays the audio output level of the Navigate to this menu item to manually initiate the IR receiver in dBu when the transmitter is fully modulated. sync transfer. Hold the IR ports on the transmitter and...
  • Page 19 945.600 reduction to noticeably reduce hiss from subtle sources such as electret microphones. • FULL is very similar to the Lectrosonics noise NOTE: When a tuning group is selected, the available reduction system used for many years in legacy frequency selections will be limited to those that are in analog systems.

  • Page 20: Front Panel Shortcuts

    SRc-941 Dual Receiver TXBAT TONE Select the type of battery being used in the transmitter The TONE setup screen enables an audio test tone at to improve the accuracy of the battery monitor. the receiver output for precise level matching with other equipment.

  • Page 21: Scanning For Clear Frequencies

    UHF Digital Hybrid Wireless ® Scanning for Clear Frequencies Scan Window Zoom View Window Previously tuned Freq in Cursor (center bar) Block frequency Block Press both UP and DOWN arrows on control panel to switch to the Zoom View Press the BACK Freq in button to return RF activity level...

  • Page 22: Frequency Coordination

    2. Turn on all receivers. Leave transmitters off. This service is offered to authorized Lectrosonics deal- Look at the RF level display on each receiver. If ers and other customers who are using Lectrosonics ®...

  • Page 23: Specifications And Features

    4.5 dB of receiver output range, thus nician for help. reducing the measured S/N ratio figure by 4.5 dB. Changes or modifications to this equipment not ex- pressly approved by Lectrosonics, Inc. could void the user’s authority to operate it. Rio Rancho, NM...

  • Page 24: Troubleshooting

    SRc-941 Dual Receiver Troubleshooting Symptom Possible Cause INITIAL POWER ON LCD display not active or lit External power supply disconnected or inadequate. Wrong polarity power source. The external power input jack requires POSITIVE (+) to be on the center pin.
  • Page 25 UHF Digital Hybrid Wireless ® Symptom Possible Cause ANTENNAS AND RF SIGNAL STRENGTH RF Level is weak Receiver may need to be moved or reoriented. Antenna on transmitter or receiver may be defective or poorly connected - double check antennas. Improper length of antenna, or wrong antenna on transmitter or receiver.

  • Page 26: Service And Repair

    There are no adjustments inside that will make a malfunctioning unit start working. LECTROSONICS’ Service Department is equipped and staffed to quickly repair your equipment. In warranty repairs are made at no charge in accordance with the terms of the warranty. Out-of-warranty repairs are charged at a modest flat rate plus parts and shipping.
  • Page 27 UHF Digital Hybrid Wireless ® Rio Rancho, NM...

  • Page 28: Limited One Year Warranty

    This warranty does not apply to used or demonstrator equipment. Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any defective parts without charge for either parts or labor. If Lectrosonics, Inc. cannot correct the defect in your equipment, it will be replaced at no charge with a similar new item.

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