TIMTER™ Dual Transmitters

Quasonix TIMTER™ dual transmitter

Ultimate Bitstream Accuracy Starts Here

Quasonix digital multi-mode dual telemetry transmitters provide the flexibility of two high performance, independent transmitters in one package. The standard 2.0 inch by 3.0 inch design includes a single MDM-15 interface as a primary connector for power, clock and data, and serial communications, while providing two separate RF outputs via SMA connectors. This configuration is ideal for two antenna applications that utilize Space-Time Coding (STC) or Frequency Diversity. The transmitters are designed to transmit airborne telemetry data from a test article to ground stations.

A legacy side-by-side design is employed in applications requiring bands that currently are not available in the Quasonix TIMTER Multi-mode Dual Telemetry Transmitter.

ARTM Modulations

Quasonix transmitters offer three different modulations of increasing spectral efficiency – PCM/FM, SOQPSK-TG, and Multi-h CPM – also known as ARTM Tiers 0, I, and II, at standard bit rates from 0.1 to 28 Mbps (0.05 to 14 Mbps for PCM/FM). Options (HR/LR) are available to extend the upper limit to a maximum of 46 Mbps (23 Mbps for PCM/FM) and the lower limit to a minimum of 50 kbps (25 kbps for PCM/FM). With bandwidth at a growing premium in flight test telemetry, you can take advantage of 2 to 2.5 times the data capacity of the legacy PCM/FM waveform with SOQPSK-TG and Multi-h CPM.

Product Configurations

RF Output Power

  • 10 W per output

Frequency Band

  • Lower S (2200.5 MHz – 2300.5 MHz)
  • Mid C and Euro Mid C (5091.0 MHz – 5250.0 MHz)
  • Lower C (4400.0 MHz – 4950.0 MHz)
  • C with Mid C (4400.0 MHz – 4950.0 MHz) and (5091.0 MHz – 5150.0 MHz)
  • C and Euro Mid C (4400.0 MHz – 4950.0 MHz) and (5091.0 MHz – 5250.0 MHz)
  • Lower L (1435.5 MHz – 1534.5 MHz)
  • Upper S (2300.5 MHz – 2394.5 MHz)
  • S (2200.5 MHz – 2394.5 MHz)

Baseband Interface

  • TTL – 10k ohms to ground
  • TTL – 75 ohms to ground
  • TTL – Selectable between 75 ohms to ground and 10k ohms to ground
  • TIA/EIA-422 (RS-422) – 120 ohms differential
  • TIA/EIA-422 (RS-422) – 120 ohms differential, even when unit is powered off
  • Dual-mode – Selectable between TTL (terminated 10 ohms to ground) and RS-422 (terminated 120 ohms differential)
  • Dual-mode – Selectable between TTL (terminated 75 ohms to ground) and RS-422 (terminated 120 ohms differential)
  • Tri-mode – Selectable between TTL (terminated 75 ohms to ground), TTL (terminated 10k ohms to ground), and RS-422 (terminated 120 ohms differential)
  • LVDS (Low Voltage Differential Signal)

Other Highlights

  • Many Output Power Options with Exceptional Efficiency
  • Outputs from 5 W to 10 W, per output, and optional variable power – all while drawing less current than the competition
  • Automatic Data Rate Tracking
  • As long as the external clock remains within the specified data rates above, the transmitter will automatically adjust to it with no programming or configuration required
  • Bypassable Randomizer
  • Standard IRIG-106 fifteen-stage randomizer, for applications with non-encrypted data
  • Intuitive Control
  • Straightforward configuration and control and platform-independence with serial terminal programming

Related Literature


TIMTER™ Dual Transmitter ManualJan-2021

Installation and operation of Quasonix’s TIMTER™ Multi- mode Dual Telemetry Transmitters.

TIMTER™ Dual Transmitter DatasheetJun-2020

Features, popular options, and specifications for Quasonix’s dual telemetry transmitters.

Available on Most Dual Transmitters 

  • Space-Time Coding (STC)
  • Low Density Parity Check (LDPC) Error Correction System
  • Wide input voltage range
  • Clock generator output to baseband connector
  • Randomizer output to baseband connector
  • Dual power (two settings, “high” and “low”)
  • Variable power (32 discrete power level settings, spanning 24 dB)
  • Clock-free baseband interface
  • Frequency offset
  • High bit rate option increases maximum bit rate to 46 Mbps (23 Mbps for Tier 0)
  • Low bit rate option decreases minimum bit rate to 50 kbps (25 kbps for Tier 0)
  • Limited current in RF Off state
  • Modulation scaling
  • Hardware presets (PS2, PS4, PS8, or PS16)
  • Automatic carrier wave output
  • Adapter plate

Related Literature


STC vs. Traditional Two-Antenna Solution (Video)Oct-2010

Recording from an early test flight showing how Space-Time Coding eliminates signal fades inherent in a normal two-antenna solution.

Receiver and Transmitter Low-Density Parity Check GuideSep-2019

This technical guide introduces Low-Density Parity Check (LDPC) encoding, its uses and benefits, the Quasonix products it is available for, and considerations for optimal set-up and use.

Receiver and Transmitter Space-Time Coding DatasheetOct-2018

The Quasonix Space Time Coding Solution eliminates link outages caused by the “two-antenna problem,” improving behavior of received signal power and overall link availability.

Receiver and Transmitter Low-Density Parity Check DatasheetOct-2019

The Low Density Parity Check (LDPC) Forward Error Correction mode improves link margin equivalent to nearly tripling the operating distance on your telemetry link.

IRIG 106-13, Appendix N InterpretationJul-2020

Explains Quasonix’s standard transmitter protocol and how transmitters with the C7 option (IRIG 106-07 control protocol) will behave differently.


Supporting Items

Quasonix TIMTER™ transmitter adapter plate for a 2" x 3" transmitter onto a 2.5" x 3.5" footprint
Adapter Plate for 2.5″ x 3.5″ FootprintThis adapter plate allows for the standard 2” x 3” TIMTER™ to be mounted to the larger 2.5” x 3.5” mounting surface occupied by other industry transmitters. Part Number: QSX-AP96
Quasonix TIMTER™ transmitter MDM-15 RS-422 and TTL wiring harness
MDM-15 RS-422 and TTL Wiring HarnessFemale MDM-15 connector wiring harness with banana plugs for power and ground, BNC connectors for both RS-422 and TTL clock and data, and a DB-9 connector for serial control. Part Number: QSX-AC-MDM15-HARNESS-PIN-VR
Quasonix TIMTER™ transmitter MDM-15 RS-422 connector with pigtails
MDM-15 RS-422 Connector with PigtailsFemale MDM-15 connector with 36-inch pigtails. For RS-422 clock and data. Part Number: QSX-AC-MDM15-36-PIN
Quasonix TIMTER™ transmitter MDM-15 RS-422 wiring harness
MDM-15 RS-422 Wiring HarnessFemale MDM-15 connector wiring harness with banana plugs for power and ground, BNC connectors for RS-422 clock and data, and a DB-9 connector for serial control. Part Number: QSX-AC-MDM15-HARNESS-PIN
Quasonix TIMTER™ transmitter MDM-15 TTL connector with pigtails
MDM-15 TTL Connector with PigtailsMale MDM-15 connector with 36-inch pigtails. For TTL clock and data. Part Number: QSX-AC-MDM15-36-SOCK
Quasonix TIMTER™ transmitter MDM-15 TTL wiring harness
MDM-15 TTL Wiring HarnessMale MDM-15 connector wiring harness with banana plugs for power and ground, BNC connectors for TTL clock and data, and a DB-9 connector for serial control. Part Number: QSX-AC-MDM15-HARNESS-SOCK
Quasonix MDM-9 female to MDM-9 male harness
MDM-9 Female to MDM-9 Male HarnessMDM-9 Female to MDM-9 Male Harness, 18 inches. Part Number: QSX-AC-MDM9MF-HARNESS
Quasonix transmitter handheld programmer
Ruggedized Handheld ProgrammerThe easiest way to remotely control transmitters and receivers without a bulky computer or monitor. Part Number: QSX-AC-HHPROG-1050-B
Quasonix TIMTER™ transmitter AC-powered heat sink
Transmitter AC-Powered Heat SinkFan-cooled, AC-powered heat sink for transmitters. Used for testing at the bench; not airborne approved. Part Number: QSX-AC-32-HS-12V (formerly QSX-TIMTER-HS-12V).
Quasonix TIMTER™ transmitter digital frequency and mode switchbox
Transmitter Digital Frequency and Mode SwitchboxTransmitter digital frequency and mode switch box with MDM-9 connector allows configuration without the use of a computer. Part Number: QSX-AC-DSWBX
Quasonix TIMTER™ transmitter-powered heat sink, cable, SMA extender, and base plate
Transmitter-Powered Heat SinkFan-cooled heat sink for 2″ x 3″ transmitters for airborne applications. Operates from 21 VDC to 34 VDC, powered from existing transmitter wiring. Part Number: QSX-AC-HS-28V-SP
Quasonix TIMTER™ transmitter-powered heat sink wiring harness
Transmitter-Powered Heat Sink Wiring HarnessExternal wiring harness for fan-cooled heat sink for 2″ x 3″ transmitters. For airborne applications. Part Number: QSX-AC-HARNESS-HEATSINK-TX
Quasonix USB-to-serial converter cable
USB to Serial Converter CableAllows for transmitter configuration using a computer that has a USB port but no serial ports. Part Number: QSX-AC-USBSER-CONV

Related Literature


Transmitter Handheld Programmer DatasheetOct-2019

Features of the ruggedized programmer, which is the easiest way to remotely control transmitters without a bulky computer or monitor.

Transmitter Heat Sinks DatasheetOct-2018

Quasonix offers different types of integrated and add-on heat sinks, as described in this datasheet. Please contact Quasonix for heat sink recommendations for your particular TIMTER™ transmitter.

Transmitter Handheld Programmer Manual (Gen 2)Aug-2019

Operation of the 2nd Generation Quasonix Ruggedized Handheld Programmer, which is designed to facilitate setting up transmitters for operation.

Transmitter Switchbox Manual (Gen 2)Apr-2020

How to set up and use the second-generation digital frequency and mode switchbox, released in 2018, for TIMTER™ transmitters.

Quasonix Product Lines

4 thoughts on “TIMTER™ Dual Transmitters”

    • Correct, there is no FM option available on the dual transmitter. The FM option is for support of legacy systems, but the dual transmitter is designed to support modern modulations.

      Package code will be defined for you once you have settled on all of the features that you want.

  1. The dual transmitter are used with 2 antennas to improve irradiation diagram, so to improve reception data into temetery ground station.
    Into dual transmitter there are some special feature to improve irradiation diagram?
    the dual transmitter has some special connection with stc feature?
    There is some great difference if a use 2 normal transmitter instead dual transmitter.



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