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
| Type | Title | Updated | Description |
|---|---|---|---|
| TIMTER™ Dual Transmitter Manual, Firmware v2 | May-2022 | Installation and operation of Quasonix’s TIMTER™ Multi-Mode Dual Telemetry Transmitters, Firmware version 2.xxx (required for transmitters with the -D2 option). Find firmware version with VE command or in startup banner. |
| TIMTER™ Dual Transmitter Manual, Firmware v1 | May-2022 | Installation and operation of Quasonix’s TIMTER™ Multi-Mode Dual Telemetry Transmitters, Firmware version 1.xxx. Find firmware version with VE command or in startup banner. |
| TIMTER™ Dual Transmitter Datasheet | Nov-2022 | Features, popular options, and specifications for Quasonix’s dual telemetry transmitters, which optionally support Low-Density Parity Check (LDPC) Coding and are Space-Time Coding (STC) capable. |
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
| Type | Title | Updated | Description |
|---|---|---|---|
| Receiver and Transmitter Low-Density Parity Check Guide | Sep-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 Datasheet | Nov-2022 | 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 Datasheet | Nov-2022 | 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 Interpretation | Jul-2020 | Explains Quasonix’s standard transmitter protocol and how transmitters with the C7 option (IRIG 106-07 control protocol) will behave differently. |
Supporting Items
| Image | Item | Description |
|---|---|---|
| Adapter Plate for 2.5″ x 3.5″ Footprint | This 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 Pad | 2″ 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 Harness | Female 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 Pigtails | Female 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 Harness | Female 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 Pigtails | Male MDM-15 connector with 36-inch pigtails. For TTL clock and data. Part Number: QSX-AC-MDM15-36-SOCK |
| MDM-15 TTL Wiring Harness | Male 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 Harness | MDM-9 Female to MDM-9 Male Harness, 18 inches. Part Number: QSX-AC-MDM9MF-HARNESS |
| Transmitter AC-Powered Heat Sink | Fan-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 Switchbox | Transmitter digital frequency and mode switch box with MDM-9 connector allows configuration without the use of a computer. Part Number: QSX-AC-DSWBX |
| Transmitter-Powered Heat Sink | Fan-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-Powered Heat Sink Wiring Harness | External wiring harness for fan-cooled heat sink for 2″ x 3″ transmitters. For airborne applications. Part Number: QSX-AC-HARNESS-HEATSINK-TX |
| USB to Serial Converter Cable | Allows for transmitter configuration using a computer that has a USB port but no serial ports. Part Number: QSX-AC-USBSER-CONV |
Related Literature
| Type | Title | Updated | Description |
|---|---|---|---|
| Transmitter Heat Sinks Datasheet | Nov-2022 | 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) | Feb-2021 | Operation of the 2nd Generation Quasonix Ruggedized Handheld Programmer, which is designed to facilitate setting up transmitters for operation. |
| Transmitter Switchbox Manual (Gen 2) | Feb-2021 | How to set up and use the second-generation digital frequency and mode switchbox, released in 2018, for TIMTER™ transmitters. |
Thermal Considerations
It is important that the transmitter’s bottom surface (on the face opposite the product label) be securely attached to a baseplate capable of dissipating the power produced by the transmitter model in use. This mounting baseplate must be flat, smooth, and clean.
ATTENTION: You must operate the transmitter with a proper heat sink. Failure to do so may lead to permanent damage to the unit and will void the warranty. Overheating can occur in a matter of seconds when a transmitter is not properly heat-sinked. In absolutely no case should any type of stickers or labels be applied to the bottom surface of the transmitter.
The heat sink required for a particular transmitter depends heavily on the installation. Factors such as altitude, air temperature, air flow, and mass of the mounting surface all have a substantial impact on the flow of heat away from the transmitter. Quasonix offers several types of integrated and add-on heat sinks. Please contact support@quasonix.com for the power dissipation required and heat sink recommendations for your particular TIMTER™ transmitter.
Regardless of the heat sink, Quasonix strongly suggests using a thermal pad, such as Q-Pad® II from Bergquist.
Is there a way for me to get a Mock-up model of a Dual TIMTER?
Thanks for your query, Gregory. One of our representatives will contact you to learn more about your use case and to determine the best possible solution for your needs.
There is no FM option into dual transmitter?
How I can define package code?
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.
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.
Regards
Here is some information that may help answer your questions. It starts with a few papers presented at the International Telemetering Conference and also includes excerpts from a couple of training presentations:
https://repository.arizona.edu/handle/10150/605606
https://repository.arizona.edu/handle/10150/595758
https://repository.arizona.edu/handle/10150/595778
https://www.quasonix.com/files/hill-itc-short-course-stc-excerpt-2013.zip
https://www.quasonix.com/files/transmitter-configuration-with-stc-and-ldpc.zip
You can also do a search of our website – click the magnifying glass in the top menu and type in “STC” – to learn more about Space-Time Coding and its inclusion in Quasonix products.