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Social Media WireLists50 350pxIf you find that the USB on your DSQD or M2R is not allowing you to make firmware updates or connect to Wireless Designer, but your unit is otherwise operating normally, you may need an EEPROM update.

EEPROM stands for Electrically Erasable Programmable Read-Only Memory and is a board chip integrated in electronic devices to store small amounts of data by allowing individual bytes to be erased and reprogrammed. EEPROM chips in Lectrosonics equipment control the behavior of the USB jack. Fortunately, updating your EEPROM is something you will rarely, if ever, have a need to do. But if it does need to be done, doing it yourself will save valuable time in not having to send it in to us.


Social Media WireLists48 350pxWhile most repairs should be done by us at the factory, there are some that you can do yourself. If the buttons on your SR receiver seem “soft” (they no longer “click” when pressed) or are slow to respond, or the keypad looks the worse for wear, you can easily replace it. 



Before you begin, assemble the following tools:

  • SR Keypad. For SR, SRa and SRb, the Lectrosonics Part Number is 48093. For the SRc, it is 48626.
  • Static grounding strap*
  • Small flathead and Phillips head screwdrivers
  • Small needle nose pliers or electronics tweezers
  • GooGone or similar adhesive remover
  • Lint-free wipe or paper towel
  • Soldering iron and solder wick
  • (Optional) Black Sharpie

Social Media WireLists47Today's wideband systems can easily overlap each other, which makes frequency band planning a necessity. In the US our wideband units cover 470 to 608 MHz; in Europe that goes up to 614 MHz. When working out of a bag, attention to avoiding frequency overlap between talent receivers and hop or IFB transmitters is doubly crucial, as these units sit in close physical proximity to each other. The goal is to keep different types of RF system spectrums separated from each other so that they don't cause interference and disrupt each other's range and performance. Proper band planning avoids overlap and interference issues.

Three general suggestions before you plan:


Social Media WireLists46 300pxDo you record reality TV, legal proceedings, corporate meetings, sports or other situations where you need to keep your audio signal away from prying ears? For those instances where your transmission needs to be kept secure, without sacrificing audio quality, Lectrosonics offers AES-256 encryption in our digital wireless systems. Receivers that support encryption are the DCHR, DR, DSQD, M2R (when loaded with 3.X firmware), and the DCR822.

What Is AES-256?

The Advanced Encryption Standard (AES) is the only publicly-accessible, military-grade code available for protecting highly confidential data. AES uses symmetric key encryption to scramble the signal, and only those who have the corresponding key can decrypt it. AES-256, with a key length of 256 bits, supports the largest bit size over a small bandwidth and is nearly unbreakable via brute force approach.
An encryption key is first created in the receiver. The key is then synced with an encryption-capable digital transmitter, via the IR port. The audio will be encrypted and can only be decoded if both receiver and any associated transmitters have the matching encryption key. If you are trying to transmit an audio signal and the keys do not match, no sound will be heard.


  1. Wire List #45 – Three Easy Steps to Setting Compatibility Modes and IR Sync in Lectrosonics Receivers
  2. Wire List #44 – Improved Frequency and Phase Response With Our New Wireless Systems
  3. Wire List #43 – Connecting to Wireless Designer Through A Personal Network: 
The Mac version
  4. Wire List #42 – Connecting To Wireless Designer Through A Personal Network, Using A Router or a Switch
  5. Wire List #41 – 7 Easy Steps to Streaming Online with Lectrosonics Duet
  6. Wire List #40 – Two Steps To Free A Trapped TA-5 Connector
  7. Wire-Lists #39: Distancing with Dante
  8. Wire-Lists #38: Solo Use of the Walk Test Recorder in Wireless Designer in 5 Easy Steps
  9. Wire-Lists #37: Custom Tuning Ranges + 4 Other Cool Things in Wireless Designer
  10. Wire-Lists #36: Additional Tricks for Gain Staging Transmitters and Receivers with Recorders - Part 2
  11. Wire-Lists #35: Two Pros Share Tricks for Gain Staging Transmitters and Receivers with Recorders – Part 1
  12. Wire-Lists #34: A Quick Primer on Setting Audio Input Gain On Wireless Mic Transmitters
  13. Wire-Lists #33: Hey! What's That Sound?
  14. Wire-Lists #32: 4 Quick Tips for Antenna Performance
  15. Wire-Lists #31: Improving Signal to Noise Ratios with PF25 Filters
  16. Wire-Lists #30: Maintaining Social Distancing With Dante-Enabled Equipment
  17. Wire-Lists #29: 4 Tips to Improving Your Wireless Signal To Noise Ratio
  18. Wire-Lists #28: Five Tips for Troubleshooting Wireless Mics
  19. Wire-Lists #27: Advice for Navigating The Block 19/470 Overlap
  20. Wire-Lists #26: Developing Sanitation Protocols for Lav Work:
  21. Wire-Lists #25: 5 Best Practices and Tips for Creating An Online Worship Experience
  22. Wire-Lists #24: Making A Coaxial Dipole Antenna With 6 Items, In 8 Easy Steps
  23. Wire-Lists #23: Phantom Power with M2Rs and Other Receivers, plus 6 Best Practices
  24. Wire-Lists #22: 5 Steps To Getting The Most Out Of The Broadcast Loop
  25. Wire-Lists#21: The #1 Way To Get Flawless Wedding Video Sound With MTCR
  26. Wire-Lists#20: Equipment Disinfection
  27. Wire-Lists#19: ETSI standards, 75 and 50 kHz Deviation for Transmitters, and You
  28. Wire-Lists#18: Everything You Need To Know About Firmware Updates: Part 3
  29. Wire-Lists#17: Everything You Need To Know About Firmware Updates: Part 2
  30. Wire-Lists#16: Everything You Need To Know About Firmware Updates: Part 1
  31. Wire-Lists#15: 4 Things To Check Before We Fix Your Equipment
  32. Wire-Lists#14: My Transmitter Took A Bath! Now What? 5 Steps To Help (plus a bonus tip).
  33. Wire-Lists#13: Three HM Transmitter Hacks (aka “MacGyvers”) for Desperate Situations
  34. Wire-Lists#12: Popular Receiver Antenna Combos
  35. Wire-Lists#11: Popular Transmitter Antenna Combos
  36. Wire-Lists#10: 1 Tip to Identify Types, and 9 Ways To Prevent Wireless Mic RF Drop-Outs
  37. Wire-Lists#9: Three Wireless Designer Tips and Tricks
  38. Wire-Lists#8: Why Are You Holding Your Mic Like That? The Dos and Don’ts of RF Attenuation
  39. Wire-Lists#7: Cold Weather Care for Transmitters, Mics and Receivers
  40. Wire-Lists#6: Preventing Pogo Pin Failure In Your SSM
  41. Wire-Lists#5: 4 Ways to Mangle Your Mic
  42. Wire-Lists#4: SM Transmitter Cleaning – Tips for Battery Doors and 5-Pin Jacks
  43. Wire-Lists#3: Lessons On Battery Care For The Long Ranger
  44. Wire-Lists#2: My Transmitter Doesn’t Work! Three Things To Check
  45. Wire-Lists#1: The 4 Don’ts for Preventing Sick Transmitters

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