Radar and Measurement Technology

Command Transmitter System (CTS)

SPC’s Command Transmitter Systems (CTS) provides remote control and flight termination functions through a fully-redundant self-contained solid-state system, comprised of the following:

CTS ExciterThe Exciter incorporates state-of-the-art Direct-Digital-Synthesis technology to simultaneously generate an RF carrier and up to 6 of 20 available standard IRIG-B tones. It has 20 watts of output power and an internal ferrite isolator. The Exciter may also be used as a standalone unit. For more information on the CTS Exciter, please request the Exciter brochure using the form below.
High-Power Amplifier

The high-power amplifier (HPA) is solid-state, dependable, and cool running, allowing continuous 1-kW output power at temperatures from 0 to 50 degrees Celsius, and from sea level to 30,000 feet AMSL. The CTS is MIL-STD-461C qualified and designed to military standards for high MTBF and continuous 24-hour-per-day operation.

State-of-the-art CMOS micro-controllers provide full fault detection and reporting. High-power ferrite isolators allow full-power operation with antenna VSWRs up to 2:1. As an optional feature, each HPA sub-system is provided with an RF switch matrix that allows real-time replacement of HPA units. External modulation inputs may be used to modulate the transmitters with externally-generated tones from 10 Hz to 100 kHz.

The system can be switched automatically or manually between transmitters. Automatic switching to the redundant system is completed in less than 5 ms upon detection of an internal fault or at preset RF power thresholds.

The system is mounted in two standard 60" racks for easy installation in mobile platforms. The roller-bearing, tiltable rack slides allow easy access within the chassis for low MTTR. CTS generally ships with front panel button operation for broadcast frequency and tones.

Add-on options are available from SPC for remote control features. For more information on an integrated control system, see SPC's Flight Termination System

Controls & Indicators

Local Control: CTS Exciter

  • Automatic or manual
  • Either transmitter as primary or secondary Local/Remote
  • Alarm reset and audio alarm disable
  • System fault
  • Overtemperature fault

RF Power Monitor:

  • Forward and reflected RF output power level
  • Forward and reflected RF output power fault
  • Overtemperature


  • Local/Remote
  • Carrier enable, carrier on
  • RF output power attenuator
  • RF carrier frequency
  • Selected audio tone (up to 6 of 20)
  • Deviation monitor
  • Compressor on/off and limit set
  • Overtemperature fault

HPA Power Supply:

  • Line power (indicators)
  • System power (circuit breaker/switch)
  • HPA 28-volt power (circuit breakers/switches, indicators)
  • Overtemperature

Dimensions: 2 standard 19" racks, 32" deep and 60" high

Antenna Connectors: Female type LC, mounted on left-rear upper rack surfaces

Weight: Approx. 800 lb/rack

Access More Information on CTS
To access more details (brochures, technical specifications, etc.) fill out the form below. After submitting the form, you will be directed to our list of downloads. (This form is for internal SPC business purposes only. No information will be provided to third parties.)