QO-100 WB Spectrum & Web Ryde Tuner – Guernsey Amateur Radio Station GU6EFB

System Overview

The QO-100 wideband transponder is an approximately 8–9 MHz linear amateur-radio repeater payload aboard

Es’hail-2 (Qatar-OSCAR 100), used primarily for digital amateur television (DATV) and other wideband transmissions

Parameter	Value
Orbit	Geostationary at 25.9° East
Uplink	2401.5–2409.5 MHz
Downlink	10491.0–10499.0 MHz
Bandwidth	Approximately 8–9 MHz
Polarisation	Horizontally polarised

Foot print of the QO-100 Satellite show the surface area of the world covered by the satellite

Live Viewing

SRT Stream	srt://g8koe.ddns.net:8890?streamid=read:qo100
Web Chrome Browser	http://g8koe.ddns.net:8888/qo100/
Web Browser Tune Control	http://webtune.lebs.org.uk:5000

Receiver Control Web Interface

To be able to control the tuning of the satellite receiver open a web page and navigate to http://webtune.lebs.org.uk:5000/

Receiver-control page showing the live spectrum, frequency field, symbol-rate selector and Tune Ryde control.

How to tune

Move your mouse over the spectrum — any active signal rising above the noise floor.
Click a peak to tune the receiver to it. If the slot system is free, Then click on the blue bar Click to Tune Ryde Satellite Receiver
Chanel chosen should then be displayed on your chosen viwer

How slots work

The receiver is a shared, single-tuner resource — one controlling viewer at a time, no account needed.
First to request gets a 2-minute slot. Anyone else who clicks joins a queue and see a timer showing the remaining time of the current viewer.
Leaving the page (or clicking on Release Control) releases the receiver automatically within seconds.

Connecting to the QO-100 SRT Channel

Use the following sequence:

1. Open your chosen SRT-capable viewing software and use the information srt://g8koe.ddns.net:8890?streamid=read:qo100 to connect to the stream.

Recommended software is the Haivison Play ISR Video Player software, Link to software below.

https://www.haivision.com/products/download-play-isr

2. Open web control page.3. Confirm that DATV video is being received.

Example DATV video received from the QO-100 SRT stream.

If no transmission is visible, open the receiver-control web interface and check the spectrum and available channels.

Selecting and Tuning a DATV Channel

The spectrum display represents the wideband transponder and allows a transmission to be selected directly.

The normal operating sequence is:

1. Locate the required DATV signal on the spectrum.

2. Move the mouse pointer to the centre of the signal.

3. Click the centre of the transmission.

4. Symbol rate selection should be automatic when the required signal to view has been selected by clicking on the spectrum display, but you have the option from the drop down menu to chose a symbol rate.

5. Click the blue Tune Ryde button.

The receiver should tune to the selected channel and the transmission should appear in the SRT player or

browser window.

Symbol Rate Selection

The selected symbol rate must match the transmission being tuned. The example uses 500 KS.

If the symbol rate does not match the transmission, the Ryde receiver will not correctly decode or display the DATV service.

Beacon Failure Condition

Note that the QO-100 beacon can occasionally fail. When this occurs, receive picture may no longer look normal, we just have to wait until the beacon resets its self-back to normal.

Example of the abnormal DATV display