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SRb Firmware Revision History


This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.


SRb v2.1 - 30 November 2018

  • Fixed problem introduced in v2.0 where the PLL didn't lock for some combinations of new and old circuit boards.

SRb v2.0 - 28 November 2018

  • Added NU Hybrid mode for compatability with current production digital hybrid transmitters certified for use in the US and Canada.
  • Change the way that Talkback mode is accessed, to make it available for both legacy and "Nu" digital hybrid modes.

SRb v1.8 - 23 December 2014

Added support for new RF boards using LMX2485 PLL (Rev. P). The RF board type is detected at power-on.

SRb v1.7 - 15 January 2014

Fixed a bug wherein the Rx2's battery status icon showed the Rx1 battery voltage.

SRb v1.6 - 11 November 2013

  • Added ability to display transmitter battery voltage. The "Back" button cycles between main window, external voltage and transmitter battery voltage pages.
  • Added "fine" tuning mode, which supports 25 kHz steps.
  • Replaced the warnings that were removed in version 1.5 with new ones that are applicable to the SRB. (The SRA warned if rx1 was approximately 4.5 MHz above rx2; the SRB will now warn if rx1 is approximately 4.5 MHz below rx2.)

SRb v1.5 - 26 July 2013

  • Removed warnings about two receiver frequencies differing by approximately 4.5 MHz, as the SRB does not have this limitation.
  • Fixed a problem wherein scans could erroneously report quiet channels as noisy under very specific circumstances.

SRb v1.4 - 01 May 2013

  • Added new compatibility mode 7.
  • Make squelch system ignore supersonic emissions from transmitters, especially "Mode 7" transmitters. If upgrading to this version for the purpose of using compatibility mode 7, hardware ECO #6746 is recommended for optimal audio quality.

SRb v1.3 - 13 February 2013

  • Fixed problem wherein an audio level setting of "+1" could result in an incorrect audio level after a power cycle.
  • Improved dynamic tracking accuracy in compatibility mode 6.
  • User interface now restores channel 2 settings when leaving ratio diversity mode.

SRb v1.2 - 26 October 2012

First production release.