H-311 VHF Transmitter (TMU)

Dimensions L x W x H (in, cm) Unit Weight (g) Transmitter Electronics Operational Life @ 60BPM, Std Pow (months) Operational Life @ 60BPM, Low Pow (months) Microprocessor Control Options
1.4 x 1.4 x 1.1
3.5 x 3.5 x 2.8
88 MK9 10.3 n/a MS6, MA, MS9, MDC, MS4, MS5

Telonics designed the H-311 transmitter configuration for medium birds.

Operational Life Information

Specifications for Transmitter Electronics

MK9 Transmitter General Specifications

The MK9 Transmitter is a single frequency, microprocessor controlled pulsed-CW transmitter, designed for operation in the 140 - 220 MHz frequency range.

Frequency Range 145-160 MHz, 160-175 MHz, 175-190 MHz, 210-230 MHz
The MK9 can generally be programmed in 10 kHz steps within a given frequency range (e.g. 148.010 - 148.020 MHz). Intermediate steps may be available - contact factory for details.
Frequency Tolerance Better than ±25 ppm over temperature and voltage range
Temperature Range -30 to + 50°C (Note: Temperature range is for the transmitter only. The power supply must provide the required peak current and voltage requirements for the transmitter over the expected temperature range.)
Shutdown Component Externally controllable by presence of a small magnet
Output Power Programmable standard/ high power (1x/ 2x measured into 100Ω load).
Output Power OptionPeak Power Output Levels
Relative to Standard Power
LowNot Available
Standard1 x
High2 x
Extra highNot Available
RF Pulse WidthConfigurable from 15 - 250 msec
Pulse PeriodConfigurable from 400 - 2000 msec (30-150 Bpm)
Spurious Emissions<-40 dBc at frequency offset > 10 kHz from carrier
Harmonic SuppressionBetter than 30 dB (>40 dB typical)
Available Sensors Option MS6 - Mortality Sensor (parameters are user programmable)
Option MS9Tip Switch (head up/head down - user programmable)
Seasonal Timing Option MDC - 8 programmable seasons, 8 programmable on-off duty cycles within each season. Programmable real-time clock control seasons and duty cycles. Programming can be completed at the factory or in the field with the purchase of software. Typical timing accuracy of <± 30 min/yr is reasonable for most applications. Chart reflects known error limits.
Temperature (°C)Error Limits (min/yr)
-40°C~ -73 to -105 (extrapolated)
-20°C-25 to -58
0°C2.6 to -29
50°C2.6 to -29
70°C-25 to -58
FCC Emission Designator 1k00P0N
* California Users - The MK9 transmitter exceeds the emission designator requirement of 2k00P0N for operation in California. The MK9's 1k00P0N emission designator is identical to 2k00P0N except that it occupies only half of the 2 kHz bandwidth allowed by the State of California for wildlife tracking.

VHF Transmitter Option Descriptions

MK9 Microprocessor Control Sensor Options

Opt. MS6 Mortality-Motion Sensor Provides "active or alive" or "inactive or dead" pulse period depending on activity state of the study animal. A motion-sensitive switch is incorporated in the unit to detect animal movements. The microprocessor continuously monitors the motion switch to determine when motion occurs. Once per second, the microprocessor increments an "activity counter" if motion was detected during the preceding one-second time period. This "activity counter" keeps a running total of the number of times motion was detected over a user-defined mortality evaluation time (8 sec to 6 days). The active pulse period is maintained as long as the number of switch closures in the mortality evaluation time is greater than the mortality threshold. If the number of switch closures falls below the established threshold, the unit produces the inactive period. A separate resurrection threshold allows the unit to return to the active pulse period if the number of activity counts during the mortality evaluation time exceeds the resurrection threshold.
Note: The microprocessor updates the active/inactive pulse period at intervals of 1/16th of the evaluation time. This means that after the "resurrection" threshold criterion is met, there will be a delay of up to 6.25% of the evaluation time before the transmitter reverts to the "active" pulse period. The same is true with the transition between "active" and "inactive" pulse periods. The actual time between cessation of motion and initiation of the "inactive/dead" pulse period can be up to 6.25% longer than the evaluation time.
Opt. MS9 Tip Switch Sensor Transmits one of two different pulse rates depending on orientation of transmitter. Usually designed to switch pulse rates as it passes through an angle of 0° (parallel to horizontal). Other switching angles may be selected with some configurations (factory set within 10°).** Typical uses include monitoring "head "up" and "head down" positions.
Note: The MK9 transmitter integrates the time spent "head up" vs "head down" with ~0.5sec time constant. If the transmitter position changes rapidly with respect to the integration time constant, the resulting pulse period will be between the "head up" and "head down" pulse period, providing an indication of the average amount of time the transmitter spent in the two positions.
Opt. MDC MK9 Duty Cycles Transmitters can be programmed for up to eight sequential time periods or "seasons", generally used to extend transmitter life. During each season, the transmitter may be "enabled" or "disabled". Timing is controlled by a Real-Time-Clock, allowing seasons to start and end on any desired calendar date and time, regardless of when the transmitter is initialized. Once the transmitter enters the last programmed "season", it continues to operate under the last season's parameters for the duration of the transmitter's lifetime.
Within each season, the transmitter may be programmed with an on/off "duty cycle" to further extend transmitter lifetime. Each on/off cycle can be defined in one hour increments from 1 hour to 255 hours (about 10.6 days).



Size1.4 x 1.4 x 1.1
3.55 x 3.55 x 2.79
Weight88 grams
PackagingHermetic 1
Maximum allowable leak rateWaterproof (< 1 part in 106 atmospheric CC per second) 2




Minimum operating temperature-40° C
Maximum operating temperature65° C
Operational life10.3 months @ 60 BPM and 25° C

1: All electronic components, including batteries, sensors, and power sources are totally enclosed in a hermetically sealed metal housing, which is plated to resist corrosion. All external connections (antennas) are made through military approved glass-to-metal feed-throughs.

2: Helium leak bomb test- capable of operational life in 100% humidity, or while fully submerged in fresh water. (Transmission range will be reduced while transmitter is submerged.)

Related Products

Service Commitment

Since 1970, Telonics has built a reputation based on product quality, product support, service, and customer satisfaction. Telonics strives to produce the highest quality products, and to support those products accordingly.

Because of extreme conditions and the unpredictable nature associated with most telemetry applications, problems occasionally arise. Most problems can be resolved quickly. In all cases, we hope to be able to work in partnership with users to resolve problems to the user's satisfaction and to uphold our demonstrated commitment to excellence. If problems should arise, all products must be returned to our factory for failure analysis.

Warranty: VHF Transmitting Subsystems

The VHF Transmitting Subsystem includes the following main components: internal digital and radio frequency electronics comprising the transmitter, power supply (battery), exterior packaging, transmitting antenna and attachment. A refurbished Subsystem is warranted as if the Subsystem was purchased new, unless otherwise stated.

Telonics warranties only the following with respect to the Subsystem:
1.1 The internal electronics (excluding batteries) are warranted to be free from defects in materials and workmanship and to perform to the operational specifications over the specified operating temperature range as published by Telonics for the rated operational life of the Subsystem (as recorded on the final test data sheet accompanying the unit), up to a maximum of three (3) years from the date of initial shipment of the Subsystem by Telonics.
1.2 The exterior packaging integrity of hermetically sealed subsystems are warranted for the full operational life of the Subsystem, up to a maximum of three (3) years from the date of initial shipment of the Subsystem by Telonics.
1.3 The exterior packaging integrity of polymerically sealed subsystems are warranted for the operational life of the Subsystem, up to a maximum of one (1) year from the date of initial shipment of the Subsystem by Telonics.

Although each Subsystem is supplied with a power supply in the form of a battery, Telonics does not manufacture batteries (electrochemical cells), and therefore cannot warranty the battery lifespan, mechanical integrity or other battery performance issues. However, Telonics conducts extensive testing of all types of electro-chemical subsystems to determine suitability to the application. Once an electrochemical system is chosen for a configuration, testing procedures are employed at Telonics to evaluate every individual battery that is installed in each transmitting subsystem. Even using these advanced testing procedures it is not possible to determine a specific battery's lifespan or mechanical integrity.

Telonics conducts tests to assure that each unit is transmitting at the power level selected by the user. Actual range performance is a system characteristic dependent upon numerous conditions including receiver sensitivity and noise figure, receiving antenna tuning and pattern, transmitter antenna integrity, line of sight conditions in the field, and vegetation and habitat conditions and other factors specific to individual study sites. Therefore it is not possible to warranty a minimum range that will be achieved for units deployed in the field.

"Packaging integrity" as applicable to 1.2 and 1.3 above, is limited to normal wear as encountered on the animal.

It is the purchaser's obligation to make certain that it orders the correct size and type of Subsystem for the particular type and size of animal that the Subsystem will be applied to, and no warranty is expressed or implied for any failure to meet operational specifications due in whole or in part to use of an incorrect size or type of Subsystem.

No warranty is expressed or implied with regard to abnormal events or damage due to human actions such as gunshot damage, vehicle encounters, etc. Further, no warranty is expressed or implied with regard to damage resulting from misuse, accidents, unauthorized service, extreme conditions, or other causes not specifically enumerated herein.

The entire risk, as to the results and performance of the Subsystem, is assumed by the customer. Neither Telonics, nor its suppliers, shall have any liability to the customer or any other person or entity for any indirect, incidental, special, or consequential damage whatsoever, regardless whether Telonics has been told of the possibility of such damages or that such damages might be foreseeable. Telonics has no responsibility or liability for the claims of any third party. Telonics' and its suppliers' maximum aggregate liability shall not exceed the amount paid by the customer for the Subsystem.

Exercising the Warranty
If a defect occurs, return the Subsystem to Telonics within the applicable time frame noted above at the following address: TELONICS, 932 E. IMPALA AVENUE, MESA AZ USA 85204-6699. Telonics does not assume responsibility for loss or damage to equipment during shipment. Telonics does not assume responsibility for delays resulting from shipment on commercial or private carriers. We insure all equipment shipped from our facility and suggest that shipments to Telonics also be insured. Customer shall arrange for and pay all shipping, insurance and related charges incurred in the shipment of Subsystems to and from Telonics under this warranty.

Upon the timely return to our facility within the applicable time frame noted above, if the exterior packaging integrity and/or internal electronics (excluding batteries) are defective, the Subsystem will be replaced or repaired, at Telonics' sole discretion, at no cost to the customer, other than shipping charges. This remedy is the exclusive remedy. This product is supplied without any further warranties or conditions, expressed or implied, including warranties of merchantability, quality or fitness for particular reason or those arising by laws, statutes or trade usage or course of dealing.

The above warranty extends only to the original purchaser and does not cover any Subsystem which is resold or otherwise transferred from the original purchaser to another party. The warranty will be extended to customers who purchase the Subsystem directly from a Telonics-authorized distributor.