Brief description
The SILRX receiver is a double conversion FM superhet with a data slicer driven by the AF output. Additionally a fast acting carrier detect signal is available to indicate to external circuits that a signal is present. This signal is extremely useful when implementing duty cycle power save circuits (see fig 4) or to indicate to external logic that a signal is being received. It is internally derived from the degree of noise quieting due to the presence of a receive carrier.

Typical features include:
• PCB mounting, space saving SIL style
• 418 MHz SAW controlled wide band FM reception
• Selective double conversion superhet
• Sensitive typ. 0.5µV (-113 dBm) for 20 dB S/N
• High data rates, 5kbps and 10kbps
• Analogue and Digital data outputs
• Carrier detect output
• Fast enable time,< 3ms for duty cycle power save use
• Wide supply range, 4.0V to 9.0V
• Low current, 13 mA continuous, 130µA on power save (100:1)
• The SILRX radio receiver and the matching DTI (RA) approved transmitter (TXM-418-5) are self contained, PCB mounting modules capable of transferring analogue or digital data up to a distance of 200m.

Typical applications include:-
   Site paging receivers
   Line powered telephone auto diallers
   Guard patrol/lone worker protection
   Mobile panic attack
   Battery powered half duplex data networks
   Lighting control, Garage door openers
   Picture/antique protection alarms
   Paging car alarms Domestic and commercial security
   Medical Alert/Nurse Call system
   Remote industrial process monitoring
   Data transfer through hazardous environments
   Fire alarms
   Remote control, Access control