HV-330TX-S

COFDM Video Transmitter

Name: HV-330TX-S COFDM Video Transmitter
Brand: HiDes Technology
SKU: HV-330TX-S

Turns a CVBS feed into a DVB-T/ISDB-T/ISDB-Tb broadcast in real time — direct digital conversion across 1900–2500 MHz, ≥300 mW RF out, 98 × 60 × 45 mm.

Contact Specifications ↓

HV-330TX-S COFDM video transmitter, three-quarter view

Direct digital conversion, 1 kHz steps: 1900–2500 MHz
RF output, measured at 2250 MHz: ≥300 mW
MER with no external PA: >30 dB
Enclosure, 98 × 60 × 45 mm: 200 g

Overview

The HV-330TX-S is a COFDM video transmitter that encodes an analogue CVBS feed in H.264 and modulates it to EN 300 744 DVB-T, ARIB STD-B31 ISDB-T or ABNT NBR 15601 ISDB-Tb for delivery over coax or antenna, so any compliant receiver able to decode H.264 — set-top box, digital TV, USB DTV dongle or capture card — picks it up directly. It tunes 1900–2500 MHz in 1 kHz steps and delivers ≥300 mW of RF measured at 2250 MHz, holding MER above 30 dB with no external PA. Encryption is available at both the RF layer and the TS data layer, and GPS or avionics UART data can be multiplexed into the same transport stream.

[ GPS data mux ]

Video and position on one RF channel

NMEA from a GPS receiver goes into the UART and travels inside the same transport stream as the video. At the receiving end the stream is decoded for the display and the NMEA comes back out of a UART, ready for map software.

GPS receiver NMEA

Camera CVBS · D1

HV-330TX-S

UART mux

COFDM receiver UART demux

Display

Map software NMEA

UARTCVBSVideo + GPS · one RF channel

GPS receiver NMEA

Camera CVBS · D1

HV-330TX-S

UART mux

COFDM receiver UART demux

Display

Map software NMEA

Video + GPS · one RF channel

Video
UART / NMEA

Redrawn from the HV-330TX-S datasheet; its example uses an HV-120 receiver.

HV-330TX-S

Specifications

System features

01Direct digital conversion to 1900–2500 MHz in 1 kHz steps
02DVB-T bandwidth 1/1.5/2/2.5/3/4/5/6/7/8 MHz; ISDB-T/Tb fixed at 6 MHz
03UART data mux: GPS or avionics data carried in the same transport stream, port parameters configurable
04Encryption at both the RF layer and the TS data layer, against eavesdropping
05Channel switching by IR remote or on-board push buttons
06At least 500 m over a single 3C2V/RG59 coax with no repeater
07Differential RF output, so twisted pair (telephone or RJ-45) can replace coax
08Daisy-chain bus topology: several units on different channels share one cable
09Digital gain/attenuator +0 dB to −47 dB in 1 dB steps, default −15 dB
10No frame drop under QEF, low transmission latency

Video and audio

Video input: CVBS — 720×480×30I (NTSC, D1), 720×576×25I (PAL, D1)
Audio input: Stereo line-in
Video compression: H.264 — 720×480×30P (NTSC, D1), 720×576×25P (PAL, D1)
Audio compression: AAC or MPEG

RF output

RF connector: 50-Ω SMA
RF output level: ≥300 mW @ 2250 MHz
MER: Above 30 dB (no external PA)
MER may drop at high gain or attenuation levels
Spectrum shoulder (adjacent channel): Above 30 dB (no external PA)
Phase noise: < −92 dBc @ 10 kHz
Carrier suppression: Above 42 dB
Digital gain / attenuator: +0 dB to −47 dB, 1 dB step, default −15 dB

Power, mechanical and environmental

Power: 12 V / 1 A
Dimensions (W×D×H): 98 × 60 × 45 mm
Weight: 200 g
Operating temperature: 0 °C ~ 60 °C

Modulation and channel

TV standard: DVB-T EN 300 744 · ISDB-T ARIB STD-B31 · ISDB-Tb ABNT NBR 15601
Frequency range: 1900–2500 MHz, 1 kHz step
Bandwidth: DVB-T 1/1.5/2/2.5/3/4/5/6/7/8 MHz; ISDB-T/Tb 6 MHz
Constellation: QPSK, 16QAM, 64QAM
FFT: 2K, 4K, 8K
Code rate: 1/2, 2/3, 3/4, 5/6, 7/8
Guard interval: 1/4, 1/8, 1/16, 1/32
Segment: ISDB-T/Tb 13 Seg; DVB-T n/a

※ Specifications are taken from the specification tables of the 2025-11-08 manufacturer datasheet and are subject to change without notice. The resolution ceiling comes from the CVBS input, not from the modulator. No over-the-air range is listed here: real distance depends on antenna design, any external power amplifier and receiver quality — ask us for figures for your configuration.

[ Next steps ]

Bring the HV-330TX-S into your project

Tell us your vehicle, range and band, and HiDes will help plan the configuration. The full datasheet is available by email on request.

Contact Request the datasheet →

info@hides.com.tw · +886-2-2917-2417

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https://hides.com.tw/en/products/hv-330tx-s/ · +886-2-2917-2417 · info@hides.com.tw