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Introduction

This covers various sub-systems that formed part of radar types and upgrades but did not necessarily change the system type number.

Parametric Receiver Type S2001

This was developed to take full advantage of new techniques of low noise amplification to improve the performance (by enhancing receiver sensitivity) of the S232 and S264 systems by extending the effective range by 30 to 40%, while preserving the phase characteristics essential to MTI performance.

Large Vertical Aperture SSR Antenna (Type S1095)

Developed for use with the Marconi Messenger MSSR. Following a competition with the Cossor equivalent it was purchased by the UK CAA for “hogtrough” antenna replacement in 1984.  The slightly higher gain of the Marconi type (and the lower price to get the business!) were the winning factors. The Cossor LVA was largely based on the Marconi design that was submitted to RRE under a design “consultancy” that RRE funded. Essentially Cossor used the Marconi data to develop their product. Apparently there was no copyright or patents taken out and therefore RRE just passed on the information.

In 2003 Raytheon won a contract to upgrade and/or replace aging primary and secondary ATC radars in the UK under a program named Radar Station Services (RSS). This program includes the replacement of Cossor SSR equipment and the Marconi LVA antennas which have served CAA/NATS well for over 25 years.

Adaptive Signal Processor

Transmitter/Receiver Equipment

Introduction

This covers the various types of transmitter/receivers developed by Marconi and used in combination with a number of sensors to provide systems with a range of performance.

200Mhz Transmitter T3705 used on Type 7

Pictures

Transmitter Type ? used on Type 11, S232 and S264 (50cm)

Transmitter/Receiver SR1000 (10cm)

Transmitter/Receiver SR1030? (23cm)

Transmitter/Receiver SR100 used on S264A and S650 (50cm)

Transmitter/Receiver ???? used on S512

Transmitter/Receiver Types S2010, 2011, 2012, 2013, 2020, 2021

This is a range of transmitter/receivers housed in similar cabinets and using common techniques and components. They individually cover the S, L, C and 50cm bands.

S2010 1MW 10cm S-Band in four versions using a tunable magnetron especially designed to work in MTI systems; the receiver uses a low-noise parametric amplifier  [5/B1]

S2011 2MW and S2021 800kW 23cm L-Band each in two versions using a tunable magnetron which covers both powers; the receiver uses a low-noise parametric amplifier  [5/B2] [9/87]

S2012 2.25MW 10cm S-Band in two versions using spot magnetrons. the receiver uses a low-noise parametric amplifier  [5/B3] [9/87]

S2013 1MW 5.5cm C-Band in two versions using spot magnetrons especially designed to work in a height-finder system; the receiver use a low-noise parametric amplifier  [5/B4] [9/87]

S2020 500kW 50cm Band in six versions using a crystal-controlled driven power klystron especially designed to work in coherent MTI systems; the receiver uses transistor amplifiers  [5/B5] [9/88]

There are two additional equipments of later design.

S2018 3.3MW S-Band and S2019 L-Band each in two versions using a twystron broad-band output stage driven by a low-power frequency synthesizer with frequency agile and pulse compression capability. [9/88]

Equipment

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