Codan 5700 Series CBand Transceiver Technical Overview 5700

Codan 5700 Series C-Band Transceiver Technical Overview

5700 Series C-Band Transceiver Components • type 5700 Converter Module • SSPA types – – – – 5705 - 5 W 5710 - 10 W 5720 - 20 W 5730 - 30 W 5740 - 40 W 5760 - 60 W 5712 H - 120 W • LNA & TRF • type 5582 Power Supply Units

C-Band Transceiver Block Diagram Tx RF (6 GHz) Transmit IF Input (70/140 MHz) Monitor & Control SSPA Up/Down Converter Receive IF Output (70/140 MHz) SSPA Pwr & Control LNA Rx RF (4 GHz)+ LNA Pwr 48 V DC Power AC Mains Power Supply OMT TRF Antenna

HPA Transceiver Block Diagram 48 V DC Power AC Mains Tx RF (6 GHz) Transmit IF Input (70/140 MHz) Monitor & Control Receive IF Output (70/140 MHz) SSPA Up/Down Converter SSPA Control LNA Rx RF (4 GHz)+ LNA Pwr OMT TRF Antenna

C-Band Converter Module –Not on CE converters

C-Band Converter Module Transmit Side Receive Side

IF Paths • Tx IF input attenuator – 25 d. B typical range, 1 d. B steps. – 10 d. B gain from Tx IF input to Tx RF output of converter at attenuator setting of 0 d. B. • Rx IF output attenuator – 25 d. B typical range, 1 d. B steps. – 45 d. B gain from Rx RF input to Rx IF output of converter at attenuator setting of 0 d. B. • Tx IF switch - controlled by: – Warm-up timer

Tx IF Path Cable Compensation No longer available with CE market converters • Cable Compensation – Provides up to 1. 2 d. B boost (70 MHz) or 2. 5 d. B boost (140 MHz) in 16 steps – Suits over 120 m (400 ft) of low loss Belden 9913 coax – Ideal for DAMA systems - constant EIRP across entire IF band

Tx IF Path Temperature Compensation • Temperature Compensation – – – Compensates for gain variations of SSPA and Converter Selectable for 5 W, 10 W or higher SSPA’s (via SPT 5, 6 or 7) ± 1. 0 d. B level stability over -40 o. C to +55 o. C Look-up tables in EPROM Uses temperature sensors in SSPA and Converter

Synthesisers • All oscillators locked to 10 MHz oven controlled reference • 10 MHz Reference Warm-up timer – 5 -14 minute warm-up from cold switch-on (14 mins. at -40 C !) – 30 second warm-up if power interrupted momentarily – Timer Over-ride • RS 232 (SRO 1) • Allows transmission immediately from switch-on • Warm-Up LED flashes • Beware frequency accuracy! • SHF oscillator signals: Up and Down paths – Fixed 2225 MHz offset for single synthesiser models only – Step size 1 MHz in both single & dual synthesiser models

LNA Connections • LNA power source is DIP switch Selectable (LNA+15 V) • LNA Power via Rx RF input – LNA alarm and voltage shut down if >250 m. A – LNA alarm if <50 m. A or short circuited – Take care when testing at this input (turn off DC or use DC block) • LNA Power via separate connector – Current limited (max 400 m. A) – LNA alarm relay contact input

SSPA Connections • Low Power SSPA Interface – – – 48 V DC - via fuse in Converter SSPA temperature sensor for gain compensation SSPA Fail SSPA over temperature alarm Fan Supply (+12 V) • High Power SSPA Interface – – 110/220 V AC Mains Input SSPA Fail 48 V DC to Converter SSPA over temperature alarm • Fan Supply – Converter monitors current from fan to detect fan fault – Fault monitoring can be disabled (SFE 0) for SSPA’s without a fan – Not available with high power SSPAs (self-monitoring by SSPA)

SSPA Block Diagram RF INPUT FROM CONVERTER 6 V 5 INPUT BIAS -3 V 2 5 V 1 UNDER VOLTAGE 10 V 3 DC IN 10 V SWITCHED SSPA ACTIVATE 6 V 5 SWITCHED SUPPLY FAULT FROM CONVERTER SWITCHED MODE TEMP. FAULT SUPPLY AND LOGIC TEMP. SENSOR -3 V 2 OVERCURRENT UNDERVOLTAGE OVER TEMP. SENSOR FAN OUTPUT BIAS NEGATIVE RAIL GENERATOR FAULT DETECTION OVER TEMP. SENSOR

Low Power SSPA (1) • N-connector or Waveguide output options • Internal input isolator for good input VSWR • Internal output isolator for protection and good O/P VSWR • High system gain: 74 d. B (10 W to 40 W SSPA’s) nominal • Operates from 48 V DC (fully floating) – All bias supplies are generated internally • Fan supply provided separately by Converter Module • Internal fault monitoring of Ga. As FET bias conditions • Automatic shut-down if: – Bias fault detected when SSPA on - needs to be manually reset – SSPA case temperature is >75 o. C, automatically resets when SSPA cools down

Low Power SSPA (2) • Two temperature sensors: – Over Temperature shut-down – Gain v Temperature compensation (in Converter) High MTBF fan standard on 10 W, 20 W, 30 W and 40 W SSPA’s • 5 W SSPA’s are convection cooled - no fan • Maintenance – Check heatsink fins for obstructions (webs, nests, insects etc. ) – Clean heatsink to remove dust, dirt, grime etc. – Recommendation - check at least once per year

High Power SSPA • • • Available in 60 W and 120 W Completely sealed assembly WR 137 waveguide output Internal Temperature compensation Full monitor & control from 5700 Up/Down Converter • DC power supplied to the Up/Down Converter from SSPA • SSPA’s can also be operated in a stand alone configuration via front panel controls or serial commands

5582 Mains Power Supply • Switch Selectable operation from 115 V AC or 230 V AC -15%/+20% • Transceiver uses wide input range DC-DC converters – Provide low power consumption – High efficiency over full 37 V to 76 V range • Simple design ensures high reliability. – toroidal power transformer and bridge rectifier combination

Transceiver Controls • Power – Off – Stand-by – On - All circuits off - Only reference oscillator and microprocessor on - Operational mode • SSPA – Inhibit • SSPA cannot be turned on remotely (Serial or Control Input) – Remote • SSPA on only if turned on remotely (Serial or Control Input) – Activate • SSPA on unless inhibited remotely (Serial or Control Input) • DIP Switches

Front Panel Indicators • Power – Stand-by – On – Warm-Up - Only reference oscillator and microprocessor on - Operational mode - In warm-up mode, flashes if Timer Override selected • SSPA – SSPA On - SSPA on! • Fault – Conv • One or more phase locked loops in the Converter are unlocked – LNA • LNA fault detected (current sense at Rx RF input or fault input) – SSPA • SSPA fault (only detected when SSPA is activated) – Temp • SSPA case temperature too high – Fan • Fan not operating or too slow (low power transceivers only)