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VSAT ODU RF Unit - Block Upconverter (13.75-14.5GHz) with Integrated LNB (950-1700MHz), 58dB Gain

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VSAT ODU RF Unit - Block Upconverter (13.75-14.5GHz) with Integrated LNB (950-1700MHz), 58dB Gain

Name: VSAT ODU RF Unit Block Upconverter 1375145GHz with Integrated LNB 9501700MHz 58dB Gain
Brand: SETON
Price: 1 USD

Brand Name : SETON

Model Number : ST-Tx6W

Place of Origin : China

MOQ : 1pcs

Payment Terms : T/T,Western Union

Delivery Time : 30-35 days

Packaging Details : CARTON

Output Frequency Range : 13.75 ~ 14.5GHz

Input Frequency Range : 950 ~ 1700MHz

LO Frequency : 12.8GHz

Noise Figure : 15dB[Max.]

Operating Temperature : -40 ~ +60℃

small Signal Gain : 58dB[Typ.]/ 54dB[Min.]

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VSAT KU Band Block Up Converter (BUC) - ST-Tx6W

VSAT RF Assembly: LNB (950-1700MHz In) & BUC (13.75-14.5GHz Out) - 58dB Small Signal Gain

Technical Specifications

No.	ITEM	SPECIFICATION	UNIT
K-1	Output Frequency Range	13.75 ~ 14.5	GHz
K-2	Input Frequency Range	950 ~ 1700	MHz
K-3	LO Frequency	12.8	GHz
K-4	Noise Figure	15[Max.]	dB
K-5	10MHz External Reference Frequency sensitivity	-15 ~ +5	dBm
K-6	Output Power (P1dB)	+37.8[Typ.] (+25℃)	dBm
K-7	IF Input VSWR	2.0:1	/
K-8	RF Shut off	-70	dBm
K-9	In Band Spurious(Power +30dBm Output)	-50	dBc
K-10	Out of Band Spurious (Power +30dBm Output)	-50	dBc
K-11	(a) over any 2MHz Band (pk-pk)	0.5	dB
K-12	(b) over any 125MHz Band (pk-pk)	2.5	dB
K-13	(c) over any 500MHz Band (pk-pk)	4	dB
K-14	Power Draw	38[Max.]	W
K-15	DC Voltage Range	20 ~ 30	V
K-16	Weight	880	g
K-17	Operating Temperature	-40 ~ +60	℃
K-18	RF Output VSWR	2.0:1	/
K-19	Small Signal Gain	58[Typ.]/54[Min.]	dB

What is a Block Up Converter (BUC)?

A Block Up Converter (BUC) is a critical radio frequency (RF) device used in satellite communications (satcom) to transmit a signal from Earth to a satellite. Its primary function is to convert a lower frequency signal to a much higher frequency (microwave band) and amplify it with enough power to travel the vast distance to a geostationary or other satellite.

Think of it as the powerful "shouter" in a satellite link:

Your modem creates the message (data)
The BUC shouts this message on a very high-frequency channel so the satellite far away can hear it clearly
The satellite's "ears" are its transponders

It is almost always used in conjunction with a LNB (Low-Noise Block downconverter), which performs the reverse function for receiving signals.

In a nutshell: BUC (Transmit) + LNB (Receive) = ODU (Outdoor Unit) in a VSAT antenna system.

How Does a BUC Work? (Key Functions)

A BUC performs three essential operations in sequence:

Frequency Up-Conversion: This is its core task. It takes an intermediate frequency (IF) signal coming from the indoor satellite modem (typically in the L-band, e.g., 950-1750 MHz or 1400 MHz) and mixes it with a stable, high-frequency local oscillator (LO) signal. This process shifts the IF signal up to the final radio frequency (RF) band used for satellite uplinks, such as Ku-band (14 GHz), Ka-band (30 GHz), or C-band (6 GHz)
Power Amplification: The up-converted signal is very weak. The BUC contains a High-Power Amplifier (HPA), using technology like GaAs FET or GaN, to boost the signal power dramatically. Output power is a key specification, ranging from 2W (for small mobile terminals) to hundreds of watts (for large teleports)
Filtering: Internal filters clean the signal, removing unwanted harmonics and spurious emissions generated during the up-conversion and amplification process to ensure a pure transmission that meets regulatory standards

Block Diagram & Signal Flow:

Satellite Modem (Indoor)
↓
IF Signal (e.g., 1400 MHz) + DC Power via Coaxial Cable
↓
**BUC (Outdoor on antenna)**
↓
1. **Up-Converter:** IF + LO → RF (e.g., 14.25 GHz)
↓
2. **Power Amplifier:** Boosts to, e.g., 8 Watts
↓
3. **Filter:** Removes unwanted noise
↓
RF Output to Feed Horn
↓
Transmitted to Satellite

BUC vs. LNB: A Quick Comparison

Feature	Block Up Converter (BUC)	Low-Noise Block downconverter (LNB)
Function	Transmit (Uplink)	Receive (Downlink)
Direction	Earth → Satellite	Satellite → Earth
Key Task	Up-Convert & Amplify Power	Amplify with Low Noise & Down-Convert
Critical Spec	Output Power (Watts)	Noise Figure (dB)
Typical Location	On the transmit feed of antenna	On the receive feed (or part of a combined feed)

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