TIMTER™ Transmitters

Fourth-Generation Powerhouse

Quasonix digital multi-mode telemetry transmitters are the benchmark of the industry, providing unparalleled performance and value, in small, robust, power-efficient packages. The TIMTER™ transmitter, now in its third generation and smaller than ever at 4.1 cubic inches, offers the most versatility of any transmitter in the industry, with advanced capabilities like L/S/C frequency tuning and output power up to 25 Watts.

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 mW, 1 W, 5 W, 10 W, or 20 W
  • S band also available in 25 W

Frequency Band

  • Lower L band (1435.5 MHz – 1534.5 MHz)
  • Upper L band (1750.0 MHz – 1855.0 MHz)
  • S band (2200.5 MHz – 2394.5 MHz)
  • L/S band
  • C band (4400.0 MHz – 4940.0 MHz)
  • C band with “mid” option (C + 5091.0 MHz – 5150.0 MHz)
  • Euro Mid C (5150.0 MHz – 5250.0 MHz)
  • L/C band
  • S/C band
  • L/S/C band

Baseband Interface

  • TTL or TIA/RS-422 (RS-422)

Other Highlights

  • Outputs from 10 mW to 25 W and optional variable power – all while drawing less current than the competition
  • Supports migration to 4400-4950 MHz and 5091-5150 MHz bands at 5 W or 10 W
  • Automatic Data Rate Tracking
  • As long as the external clock remains within specified data rates, 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
  • Straightforward configuration and control and platform-independence with serial terminal programming

Product Literature

TypeTitleVersionFile SizeUpdatedLengthDescription

TIMTER™ Transmitter Datasheet2023.09.25Features, options, specifications, and select accessories for Quasonix’s range of multi-mode telemetry transmitters, including nanoTX™ and nanoPuck™.

Receiver and Transmitter Catalog2022.11.28Catalog of products including Rackmount and Compact RDMS™ Receivers; TIMTER™, nanoTX™, and nanoPuck™ Transmitters; transmitter accessories and heat sinks; Ethernet Via Telemetry (EVTM); and the Receiver Analyzer.

Available on Most Transmitters

  • Low Density Parity Check (LDPC) Error Correction System
  • Multiple hardware-selected presets (2, 4, 8, or 16)
  • 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
  • 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)
  • Parallel port frequency programming
  • Parallel port mode selection
  • Automatic carrier wave output

Option Literature

TypeTitleVersionFile SizeUpdatedLengthDescription

SOQPSK with LDPC ITC Paper2013.10.21“SOQPSK with LDPC: Spending Bandwidth to Buy Link Margin,” by Terry Hill & Jim Uetrecht; presented at ITC 2013.

Receiver and Transmitter Low-Density Parity Check Datasheet2023.10.12The Low Density Parity Check (LDPC) Forward Error Correction mode improves link margin equivalent to nearly tripling the operating distance on your telemetry link.


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
Heat Sink Thermal Pad2″ x 3″ Thermal Pad, Bergquist QPAD II, 0.006″/0.152mm thick, for use with heat sinks. Part Number: QSX-AC-TXTP
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
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
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
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
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
MDM-9 Female to MDM-9 Male HarnessMDM-9 Female to MDM-9 Male Harness, 18 inches. Part Number: QSX-AC-MDM9MF-HARNESS
Transmitter Airborne IntelliCool™ 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
Transmitter Airborne IntelliCool™ 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
Transmitter Bench 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).
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
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

Accessory Literature

TypeTitleVersionFile SizeUpdatedLengthDescription

Transmitter Heat Sinks Datasheet2023.11.17Quasonix 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.

User Manuals and Guides

TypeTitleVersionFile SizeUpdatedLengthDescription

Transmitter SMA Replacement Guide1.02022.02.01Simple instructions for the field replacement of an SMA (F) connector in a Quasonix TIMTER™ or Dual TIMTER™ telemetry transmitter.

J/F 12 Files (1 MB Download)2010.07.29These files address the applicability of the US Government’s J/F 12 and DD Form 1494 classification documents to Quasonix’s TIMTER™ transmitter product line.

Receiver and Transmitter Low-Density Parity Check Guide1.1.12024.01.26This 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.

Transmitter RF Troubleshooting Guide1.22019.07.25Quick, three-part test to verify that the RF output on a Quasonix telemetry transmitter is working correctly.

Transmitter Overtemp Control Guide1.02018.10.26How to modify the internal overtemperature (OT) setting using the OC command. This applies to all Quasonix telemetry transmitters.

TIMTER™ Transmitter Manual3.9.182024.01.30Installation and operation of Quasonix’s TIMTER™ Multi-mode Digital Telemetry Transmitters.

Transmitter Binary Protocol Tester Manual1.0.42021.02.04How to test the binary protocol of Quasonix telemetry transmitters using Binary Protocol Tester software provided by Quasonix.

Transmitter Binary Protocol Manual4.0.32021.02.03The binary serial protocol is designed to facilitate efficient machine to machine communication. This manual defines the binary protocol version 1.009.

IRIG 106-13, Appendix N Interpretation1.22020.07.14Explains Quasonix’s standard transmitter protocol and how transmitters with the C7 option (IRIG 106-07 control protocol) will behave differently.

GMLRS Transmitter Manual1.3.182023.11.27Installation and operation of Quasonix’s GMLRS multi-mode digital telemetry transmitters.

Software Downloads

TypeTitleVersionFile SizeUpdatedLengthDescription

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