STR450 Datasheet | Unknown Manufacturer

STR450 UHF RECEIVER OPERATING INSTRUCTIONS These operating instructions are intended to provide the user with sufficient information to install and operate the unit correctly. The Wood & Douglas STR450 is a single channel synthesized UHF receiver. The unit is intended to fulfil the numerous OEM applications by virtue of its highly flexible design approach, miniature size and cost-effective performance. The unit plies with MPT1329 and as such does not require an operating licence in the UK. It is also approved to various EC specifications. INSTALLATION The STR450 is intended to fit easily and with minimum space requirements into the user's own equipment housing. The plete module is housed in a tin-plated enclosure and a bracket allows the module to be fitted in one of two planes using two screws. Figure 1 Figure 2 .. - Free Data Sheet Site. CONNECTION The type of radio antenna connector (via RF) is determined by the letter designator as follows: SAP- SMB miniature coaxial connector flying lead with a BNC connector PTFE (bush) feedthrough RSSI (when fitted) Figure 3 The audio output (AF), squelch output (SQ) and DC supply (+V) connections are made via feedthrough pins. These pins incorporate RF filtering, thus ensuring pliance with the spurious radiation levels required by MPT1329 and similar specifications. The squelch output (SQ) is an NPN open collector transistor driver. Connecting the anode of a LED to the input supply rail and the cathode to the squelch output, via a suitable current-limiting resistor, will provide an LED that is illuminated when no RF signal is present. RSSI Option An ‘S’ meter output is always available for set-up purposes on the internal test point TP1. Depending on the version specified this signal may be wired to an extra feedthrough pin, or it may replace the SQ output (the squelch mute will still operate in this instance) IC4 Location of RSSI pin when fitted C15 RV1 PL2 L8 Figure 4 USER...