MK8 Transmitter Specifications

The MK8 Transmitter is a single frequency, microprocessor controlled pulsed-CW transmitter, designed for operation in the 140 - 220 MHz frequency range.

Frequency Range 140 - 220 MHz
Frequency Tolerance ±17 ppm max @ 25°C
±25 ppm max -40°lC < Temp < +60°C
(<7ppm typical w/ variation in load impedance - 6:1VSWR)
(<3ppm typical over supply voltage range at room temperature)
Temperature Range -40°C to +60 °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 shutdown by presence of a small magnet
Output Power
Output Power Option Peak Power Output Levels
Relative to Standard Power
Low 0.5 x
Standard 1 x
High 2 x
Extra high 5 x
RF Pulse Width 15 msec standard
Can optionally be configured from 12 - 255 msec
Pulse Period Configurable from 200 - 10000 msec (6-300 Bpm)
Spurious Emissions Non-coherent Spurs <-50 dBc
Harmonic Suppression Coherent Spurs <-10 dBc
Available Sensors Motion (Hg switch - activity/mortality) - options MS6, MA
Position (Hg switch - head up/head down) - option MS9
Temperature Triggered Mortality Sensor - option MS5
Temperature Measurement Sensor - MS4
Option Resolution at standard center temperature of 37°C Calibrated Accuracy
MS4-400 0.4 deg ±(0.6°C + cal. uncertainty*)
±20°C from center temperature
MS4-400 0.4 deg ±(0.9°C + cal. uncertainty*)
±40°C from center temperature
MS4-410 0.1 deg ±(0.15°C + cal. uncertainty*)
±10°C from center temperature
*(Note: "Cal. uncertainty" is the error inherent in the calibration procedure. This value is dependant on the end users calibration procedure and equipment accuracy. For example, if the calibration process measures temperature to within ±0.1°C, then the MK8 calibrated accuracy would be:
- For 0.4 deg resolution option
±(0.6deg + 0.1deg) = ±0.7degC (±20°C)
±(0.9deg + 0.1deg) = ±1.0degC (±40°C)

- For 0.1 deg resolution option
±(0.15deg + 0.1deg) = ±0.25degC (±10°C)
Seasonal Timing 8 factory programmable on-off duty cycles - option MDC
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°C 2.6 to -29
25°C ±16
50°C 2.6 to -29
70°C -25 to -58
FCC Emission Designator 1k00P0N * California Users - The MK8 transmitter exceeds the emission designator requirement of 2k00P0N for operation in California. The MK8'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.