Codan 5700 Series C-Band Transceiver

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Codan 5700 SeriesC-Band Transceiver
Technical Overview
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5700 Series C-Band Transceiver Components

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

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C-Band Transceiver Block Diagram
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HPA Transceiver Block Diagram
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C-Band Converter Module

• Not on CE converters

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C-Band Converter Module
Transmit Side
Receive Side
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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

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Tx IF PathCable CompensationNo 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

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Tx IF PathTemperature Compensation

• Temperature Compensation
• Compensates for gain variations of SSPA and
  Converter
• Selectable for 5W, 10W or higher SSPAs (via
  SPT5, 6 or 7)
• 1.0dB level stability over -40oC to 55oC
• Look-up tables in EPROM
• Uses temperature sensors in SSPA and Converter

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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

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LNA Connections

• LNA power source is DIP switch Selectable
  (LNA15V)
• LNA Power via Rx RF input
• LNA alarm and voltage shut down if gt250mA
• LNA alarm if lt50mA 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

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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
  SSPAs without a fan
• Not available with high power SSPAs
  (self-monitoring by SSPA)

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SSPA Block Diagram
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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 SSPAs)
  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 gt75oC, automatically
  resets when SSPA cools down

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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 SSPAs
• 5W SSPAs 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

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High Power SSPA

• Available in 60W and 120W
• Completely sealed assembly
• WR137 waveguide output
• Internal Temperature compensation
• Full monitor control from 5700Up/Down
  Converter
• DC power supplied to the Up/DownConverter from
  SSPA
• SSPAs can also be operated in a stand alone
  configuration via front panel controls or serial
  commands

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5582 Mains Power Supply

• Switch Selectable operation from 115V AC or 230V
  AC -15/20
• Transceiver uses wide input range
  DC-DCconverters
• Provide low power consumption
• High efficiency over full 37V to 76V range
• Simple design ensures high reliability.
• toroidal power transformer and bridgerectifier
  combination

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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

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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)