HARDWARE / PRODUCTAdded 16 Jul 2026

FSK Transmitters (EFT Series)

Emhiser Research
FSK Transmitters (EFT Series)

Frequency-shift-keyed command/data uplink transmitters, 9 cubic-inch airborne package

Typed specifications62 values

Discloses 5 of 13 fields engineers filter by in this category (category median 3).

Frequency band
S
single frequency or channelized · datasheet p.2
Mass
340.2 g
datasheet p.3 396.9 g  |  793.8 g  |  340.2 g
Frequency range
1 435.5–1 539.5 MHz
datasheet p.3 2 300.5–2 399.5 MHz Channlized  |  2 300.5–2 399.5 MHz Single Frequency  |  1 710–1 850 MHz  |  2 300.5–2 399.5 MHz Single Frequency  +7
Envelope (L×W×H)
9 Cubic Inches
datasheet p.3 11 Cubic Inches  |  36 Cubic Inches  |  9 Cubic Inches
TX RF output power
2 W
datasheet p.3 2 W  |  5 W  |  10 W  |  20 W  +8
Data rate
0–5 000 kbps
product page
Modulation
2FSK
product page
Supply voltage
4–28 V
supply · datasheet p.3 4–28 V supply  |  4–28 V supply  |  4–28 V supply
Power consumption
3.6 W
10 Watts · datasheet p.3 1.2 W 2 Watts  |  6 W 20 Watts  |  7.5 W 30 Watts  |  9.5 W 40 Watts  +9
Operating temperature
-20–70 °C
datasheet p.3 -20–70 °C  |  -20–70 °C  |  -20–70 °C
Survival temperature
-54–125 °C
datasheet p.3 -54–125 °C  |  -54–125 °C  |  -54–125 °C

Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.

As published by the supplier12 lines, in the manufacturer's own wording
Power
2, 5/10/20 Watts Minimum
Input Impedance
50 Ohms
Deviation
+/- 25 KHz Peak
Modulation
FSK
Modulation Index
2.5 Max
Harmonics & Spurious
-60 dBc
Interface
RS232 or RS422 Compatible
Data rate
0 to 5.0 MBPS
Supply voltage
+28 +/-4 Vdc
Operating temperature
-20 to +70 °C
Altitude
Unlimited
Mass
12 oz.

About

The EFT FSK Transmitter series provides frequency-shift-keying (FSK) modulated RF transmitters used for digital data and command-link applications where FSK’s robustness to noise is preferred over wideband FM telemetry links. Catalog examples include the EFT-09D1D103 family (suffixes -00, -01, -02 for differing digital interface/coding options) in Emhiser’s 09 (9 cubic inch) package, operating in the 1435-1540 MHz D1 band at 10 W output with DC-coupled power, and related EFT-09D1D203 and EFT-09D1D502 variants covering different data-rate/power combinations, plus a D2-band (1710-1850 MHz) equivalent line such as EFT-09D2D103. These units are intended for airborne platforms needing a reliable digital FSK uplink or command transmitter counterpart to Emhiser’s analog telemetry transmitter lines, and are documented in Emhiser’s dedicated FSK Transmitters catalog (900 KB PDF).

Documentation

Need the full ICD, test reports or a specific revision? Ask the supplier directly.

Source: www.emhiser.com ↗

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