Codan 5700 Series C-Band Transceiver Technical Overview

5700 Series C-Band Transceiver Components type 5700 Converter Module SSPA types – W – W – W – W – W – W –5712H - 120W LNA & TRF type 5582 Power Supply Units

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

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

C-Band Converter Module –Not on CE converters

C-Band Converter Module Transmit Side Receive Side

IF Paths Tx IF input attenuator –25dB typical range, 1 dB steps. –10dB gain from Tx IF input to Tx RF output of converter at attenuator setting of 0dB. Rx IF output attenuator –25dB typical range, 1 dB steps. –45dB gain from Rx RF input to Rx IF output of converter at attenuator setting of 0dB. 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 1.2dB boost (70 MHz) or 2.5dB boost (140MHz) in 16 steps –Suits over 120m (400ft) 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 5W, 10W or higher SSPA’s (via SPT5, 6 or 7) –±1.0dB 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 10MHz oven controlled reference 10MHz Reference Warm-up timer –5-14 minute warm-up from cold switch-on (14 mins. at -40C !) –30 second warm-up if power interrupted momentarily –Timer Over-ride RS232 (SRO1) 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 1MHz in both single & dual synthesiser models

LNA Connections LNA power source is DIP switch Selectable (LNA+15V) LNA Power via Rx RF input –LNA alarm and voltage shut down if >250mA –LNA alarm if <50mA 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 mA) –LNA alarm relay contact input

SSPA Connections Low Power SSPA Interface –48V DC - via fuse in Converter –SSPA temperature sensor for gain compensation –SSPA Fail –SSPA over temperature alarm –Fan Supply (+12V) High Power SSPA Interface –110/220V AC Mains Input –SSPA Fail –48V DC to Converter –SSPA over temperature alarm Fan Supply –Converter monitors current from fan to detect fan fault –Fault monitoring can be disabled (SFE0) for SSPA’s without a fan –Not available with high power SSPAs (self-monitoring by SSPA)

SSPA Block Diagram

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: 74dB (10W to 40W SSPA’s) nominal Operates from 48V DC (fully floating) –All bias supplies are generated internally Fan supply provided separately by Converter Module Internal fault monitoring of GaAs 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 on10W, 20W, 30W and 40W SSPA’s 5W 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 60W and 120W Completely sealed assembly WR137 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 115V AC or 230V AC -15%/+20% Transceiver uses wide input range DC-DC converters –Provide low power consumption –High efficiency over full 37V to 76V range Simple design ensures high reliability. –toroidal power transformer and bridge rectifier combination

Transceiver Controls Power –Off - All circuits off –Stand-by - Only reference oscillator and microprocessor on –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 - Only reference oscillator and microprocessor on –On - Operational mode –Warm-Up - 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)