Portsdown 2020 Buster Software - Revision history

G3gja: /* Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only) */

2023-03-30T23:01:17Z

Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only)

G8GKQ: /* Introduction */

2020-03-16T15:47:30Z

Introduction

G8GKQ: /* Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only) */

2020-03-09T21:24:12Z

Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only)

G8GKQ: /* Introduction */

2020-03-07T22:40:55Z

Introduction

G8GKQ: /* Introduction */

2020-03-07T22:34:57Z

Introduction

G8GKQ at 20:46, 28 February 2020

2020-02-28T20:46:12Z

G8GKQ: /* Static Test Card input, MPEG-2 DVB-S output using LimeDVB */

2020-02-24T10:22:10Z

Static Test Card input, MPEG-2 DVB-S output using LimeDVB

G8GKQ: /* Reduced Power Output */

2020-02-20T15:59:20Z

Reduced Power Output

G8GKQ: /* Carrier Mode using LimeDVB */

2020-02-17T16:48:19Z

Carrier Mode using LimeDVB

G8GKQ: /* Limitations */

2020-02-17T16:38:46Z

Limitations

← Older revision		Revision as of 23:01, 30 March 2023
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	==Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only)==		==Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only)==
		+
		+	===External IP Transport Stream, H264 output===
		+
		+	This mode transmits good HD pictures at symbol rates from 500 kS/s to 2 MS/s when used with F1EJP's FreeStreamCoder v2.79 and OBS Studio. Reasonable pictures can be transmitted at 250 or 333kS/s.
		+	Note that it is often necessary to reboot the Portsdown 2020 if the symbol rate is changed and you '''must''' include an audio channel even if there is no content.

	===EasyCap input, H264 output===		===EasyCap input, H264 output===

@@ Line 9: / Line 9: @@
 * A transport stream viewer that will display H264 transport streams sent the Portsdown for testing purposes.
-The notes below apply to the latest release 202002290, built on Portsdown Buster 2020-02-05.
+The notes below apply to the latest release 202003140, built on Portsdown Buster 2020-02-05.
 ==Tested Modes of Operation using LimeDVB Firmware==

@@ Line 117: / Line 117: @@
 ===C920 Webcam input, MPEG-2 output===
 This mode transmits good pictures and audio at symbol rates from 250 kS to 5 MS.
 ==LongMynd DATV Receiver==

@@ Line 4: / Line 4: @@
 The changes being introduced with this software include:
-* A new LimeDVB mode that uses custom Firmware written by F4IHX for a LimeSDR Mini to produce DVB-S and DVB-S2 signals.
+* A new LimeDVB mode that uses custom Firmware written by F4IHX and F5OEO for a LimeSDR Mini to produce DVB-S and DVB-S2 signals.
 * The ability to select whether LimeSDR calibration takes place before transmission
 * A specific capability to transmit 1MS DVB-S2 with high reliability for use in repeater transmitters.

@@ Line 4: / Line 4: @@
 The changes being introduced with this software include:
-* A new LimeDVB mode that uses custom Firmware for a LimeSDR Mini to produce DVB-S and DVB-S2 signals.
+* A new LimeDVB mode that uses custom Firmware written by F4IHX for a LimeSDR Mini to produce DVB-S and DVB-S2 signals.
 * The ability to select whether LimeSDR calibration takes place before transmission
 * A specific capability to transmit 1MS DVB-S2 with high reliability for use in repeater transmitters.

@@ Line 7: / Line 7: @@
 * The ability to select whether LimeSDR calibration takes place before transmission
 * A specific capability to transmit 1MS DVB-S2 with high reliability for use in repeater transmitters.
-The notes below apply to the latest release 202002140, built on Portsdown Buster 2020-02-05.
+The notes below apply to the latest release 202002290, built on Portsdown Buster 2020-02-05.
 ==Tested Modes of Operation using LimeDVB Firmware==
@@ Line 74: / Line 75: @@
 ===External Transport Stream Transmission using LimeDVB===
-Portsdown version 202002290 (not yet available) introduced support for the transmission of an externally generated transport stream (generated from vMix or OBS and encoded using ffmpeg on a Windows or Linux PC) using DVB-S or DVB-S2 and the LimeDVB firmware.  More information can be found here [[IPTS Input to Portsdown with the LimeSDR]].
+Portsdown version 202002290 introduced support for the transmission of an externally generated transport stream (generated from vMix or OBS and encoded using ffmpeg on a Windows or Linux PC) using DVB-S or DVB-S2 and the LimeDVB firmware.  This works well from 333 to 1000 kS.More information can be found here [[IPTS Input to Portsdown with the LimeSDR]].  There is also a Transport Stream viewer on Menu 2.
 ==Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only)==
@@ Line 147: / Line 152: @@
 The custom LimeDVB firmware only supports QPSK and 8PSK (untested as yet).  It does not support 16APSK or 32APSK.
 ===LimeRFE Control===

← Older revision		Revision as of 10:22, 24 February 2020
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	This mode transmits reasonable pictures from Test Card C (with callsign caption if selected), or the contest numbers card at symbol rates from 333 kS to 6 MS. Audio is disabled when using the static test card or contest numbers.		This mode transmits reasonable pictures from Test Card C (with callsign caption if selected), or the contest numbers card at symbol rates from 333 kS to 6 MS. Audio is disabled when using the static test card or contest numbers.
		+
		+	===External Transport Stream Transmission using LimeDVB===
		+
		+	Portsdown version 202002290 (not yet available) introduced support for the transmission of an externally generated transport stream (generated from vMix or OBS and encoded using ffmpeg on a Windows or Linux PC) using DVB-S or DVB-S2 and the LimeDVB firmware. More information can be found here [[IPTS Input to Portsdown with the LimeSDR]].

	==Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only)==		==Tested Modes of Operation using the Portsdown Filter-Modulator Board (DVB-S only)==

@@ Line 134: / Line 134: @@
 ===Reduced Power Output===
-The Power output from the LimeSDR Mini using the LimeDVB software is less than that available using Portsdown 2019.  This has yet to be exactly characterised but initial indications are that at Lime Gain 100 it is 4 dB less than the line on this chart [[LimeSDR_Mini_Output_Power_Levels]] which was drawn up using the older software at Lime Gain 88.
+The Power output from the LimeSDR Mini using the LimeDVB software is less than that available using Portsdown 2019.  This has yet to be exactly characterised but initial indications are that at Lime Gain 100 it is one or 2 dB less than the line on this chart [[LimeSDR_Mini_Output_Power_Levels]] which was drawn up using the older software at Lime Gain 88.
 ===Increased Delay at Low Symbol Rates===

← Older revision		Revision as of 16:48, 17 February 2020
Line 139:		Line 139:

	At low symbol rates, there is an increased delay in the video/audio stream - maybe 15 seconds increase at 333 kS. It is hoped that this can be reduced in a future update.		At low symbol rates, there is an increased delay in the video/audio stream - maybe 15 seconds increase at 333 kS. It is hoped that this can be reduced in a future update.
		+
		+	===Limited DVB-S2 Modes===
		+
		+	The custom LimeDVB firmware only supports QPSK and 8PSK (untested as yet). It does not support 16APSK or 32APSK.

	===Carrier Mode using LimeDVB===		===Carrier Mode using LimeDVB===

@@ Line 132: / Line 132: @@
 The only USB Webcam that is planned to be supported in Portsdown Buster is the Logitech C920.  If you have other webcams working with Portsdown Jessie or Portsdown Stretch, then please keep using the older software.
-===Power Output===
+===Reduced Power Output===
 The Power output from the LimeSDR Mini using the LimeDVB software is less than that available using Portsdown 2019.  This has yet to be exactly characterised but initial indications are that at Lime Gain 100 it is 4 dB less than the line on this chart [[LimeSDR_Mini_Output_Power_Levels]] which was drawn up using the older software at Lime Gain 88.