Kevin "Practitioner of Wireless Black Magic" Parrish passes on this note regarding (revised) frequency selection and programming instructions for Lectrosonics SRb/5p Series Wireless Microphone Slot-Receivers:

There appears to be some confusion regarding the frequency separation requirements needed between RX-1 & RX-2.

The attached Technical Note will provide you with updated instructions that applies ONLY to SRB5P series slot-receivers… Please keep this information for future reference if by change you’re still using the old “A” series slot-receiver.

Download here:  SRb_FreqOffset_Notice.pdf