BATC Wiki - Recent changes [en-gb]

Portsdown 4 Signal Generator

M0DNY — Sat, 07 Nov 2026 13:20:48 GMT

← Older revision		Revision as of 13:20, 7 November 2026
(2 intermediate revisions by the same user not shown)
Line 1:		Line 1:
	[[File:Sgmenu1.png\|400px]][[File:sgmenu11.jpg\|400px]]		[[File:Sgmenu1-reupload.png\|400px]][[File:sgmenu11.jpg\|400px]]

	The Sig Gen is selected from a button on the top line of the Portsdown Menu 2. Selecting this takes you to the Sig Gen Menu. Here you can select the output device to use, a settings menu, or the main control page.		The Sig Gen is selected from a button on the top line of the Portsdown Menu 2. Selecting this takes you to the Sig Gen Menu. Here you can select the output device to use, a settings menu, or the main control page.

File:Sgmenu1-reupload.png

M0DNY — Sat, 07 Nov 2026 13:16:23 GMT

M0DNY uploaded File:Sgmenu1-reupload.png

New page

File:Sgmenu1-reupload.png

M0DNY — Sat, 07 Nov 2026 13:15:56 GMT

M0DNY deleted page File:Sgmenu1-reupload.png Fix thumbnail issue - [PC]

File:Sgmenu1.png

M0DNY — Sat, 07 Nov 2026 13:15:46 GMT

M0DNY deleted page File:Sgmenu1.png Fix thumbnail issue - [PC]

File:Sgmenu1-reupload.png

M0DNY — Sat, 07 Nov 2026 13:14:53 GMT

M0DNY uploaded File:Sgmenu1-reupload.png

New page

Portsdown 4 Signal Generator

M0DNY — Sat, 07 Nov 2026 13:13:06 GMT

← Older revision		Revision as of 13:13, 7 November 2026
Line 1:		Line 1:
	[[File:Sgmenu1.png\|~~800px~~]][[File:sgmenu11.jpg\|400px]]		[[File:Sgmenu1.png\|400px]][[File:sgmenu11.jpg\|400px]]

	The Sig Gen is selected from a button on the top line of the Portsdown Menu 2. Selecting this takes you to the Sig Gen Menu. Here you can select the output device to use, a settings menu, or the main control page.		The Sig Gen is selected from a button on the top line of the Portsdown Menu 2. Selecting this takes you to the Sig Gen Menu. Here you can select the output device to use, a settings menu, or the main control page.

The Muntjac SDR

G4EWJ — Fri, 06 Nov 2026 20:29:30 GMT

← Older revision		Revision as of 20:29, 6 November 2026
Line 17:		Line 17:
	'''The latest version of the Muntjac firmware is 1v0p. Please check your version on the Portsdown INFO screen.'''		'''The latest version of the Muntjac firmware is 1v0p. Please check your version on the Portsdown INFO screen.'''

	''' ~~The~~ ADE-30+ mixer is ~~out of~~ stock at DigiKey ~~and low stock at Mouser, with lead times of August / September~~.'''		'''As of 2026-11-06, the ADE-30+ mixer is in stock at DigiKey.'''

	[[File:cqtvmj25-1a.jpg\|400px]] [[File:cqtvmj25-2a.jpg\|400px]]		[[File:cqtvmj25-1a.jpg\|400px]] [[File:cqtvmj25-2a.jpg\|400px]]

Portsdown Band Viewer

G8GKQ — Wed, 04 Nov 2026 10:58:49 GMT

Band and Input Switching

← Older revision		Revision as of 10:58, 4 November 2026
Line 114:		Line 114:
	When using the Pluto BandViewer, the 4 Portsdown band-switching lines can be controlled by the center frequency set on the BandViewer. To enable this capability, switch it on in the "system" menu. The exact frequency to band relationship then needs to be set by manually editing (using a text editor) the file /home/pi/rpidatv/src/plutoview/plutoview_bands.txt		When using the Pluto BandViewer, the 4 Portsdown band-switching lines can be controlled by the center frequency set on the BandViewer. To enable this capability, switch it on in the "system" menu. The exact frequency to band relationship then needs to be set by manually editing (using a text editor) the file /home/pi/rpidatv/src/plutoview/plutoview_bands.txt

	When Pluto BandViewer is selected, GPIO pin 21 is set high to enable a system ~~inoput~~ to be switched from a PicoTuner/MiniTiouner to the Pluto input.		When Pluto BandViewer is selected, GPIO pin 21 is set high to enable a system input to be switched from a PicoTuner/MiniTiouner to the Pluto input.

	=====Portsdown 2020 with Waveshare 3.5 inch Screen and the RTL-SDR=====		=====Portsdown 2020 with Waveshare 3.5 inch Screen and the RTL-SDR=====

Portsdown Noise Meter

G8GKQ — Wed, 04 Nov 2026 10:58:18 GMT

Absolute Carrier Level Measurement

← Older revision		Revision as of 10:58, 4 November 2026
Line 48:		Line 48:

	For the carrier meausement modes, a "Flat Top" windowing function is used to measure the peak amplitude, which provides an almost constant reading across 2 fft "bins". While this is good for stability, there is a 4 dB reduction in apparent sensitivity compared to the Hanning windowing function used in the absolute and differential noise measurement modes.		For the carrier meausement modes, a "Flat Top" windowing function is used to measure the peak amplitude, which provides an almost constant reading across 2 fft "bins". While this is good for stability, there is a 4 dB reduction in apparent sensitivity compared to the Hanning windowing function used in the absolute and differential noise measurement modes.

			===Input Switching===

			When the Pluto Noise Meter is selected, GPIO pin 21 is set high to enable a system input to be switched from a PicoTuner/MiniTiouner to the Pluto input.

Portsdown NF Meter

G8GKQ — Wed, 04 Nov 2026 10:57:09 GMT

Preparing for a Measurement

← Older revision		Revision as of 10:57, 4 November 2026
(One intermediate revision by the same user not shown)
Line 41:		Line 41:
	==Preparing for a Measurement==		==Preparing for a Measurement==

	Ensure you have the latest Portsdown software loaded (Version 202110300 published Nov 2nd 2021 or later) and connect your LimeSDR to the Portsdown by USB. Note - the LimeSDR should have gateware V1.30 or the LimeDVB gateware loaded.		Ensure you have the latest Portsdown software loaded (Version 202110300 published Nov 2nd 2021 or later) and connect your LimeSDR or Pluto to the Portsdown by USB. Note - the LimeSDR should have gateware V1.30 or the LimeDVB gateware loaded.

	Connect your switched power supply to pin 26 of the Portsdown GPIO.		Connect your switched power supply to pin 26 of the Portsdown GPIO.
Line 72:		Line 72:

	The Meter will now display the Noise Figure of your LimeSDR. This is very dependent on screening and digital noise pickup, but should be in the range 5 dB to 10 dB between 146 and 1255 MHz.		The Meter will now display the Noise Figure of your LimeSDR. This is very dependent on screening and digital noise pickup, but should be in the range 5 dB to 10 dB between 146 and 1255 MHz.

			====Input Switching====

			When Pluto Noise Figure Meter is selected, GPIO pin 21 is set high to enable a system input to be switched from a PicoTuner/MiniTiouner to the Pluto input.

	==Making a Simple Measurement==		==Making a Simple Measurement==

Portsdown Band Viewer

G8GKQ — Wed, 04 Nov 2026 10:54:26 GMT

Band Switching

← Older revision		Revision as of 10:54, 4 November 2026
Line 110:		Line 110:
	It is hoped to add the waterfall capability to the BandViewer for the Airspy and RTL-SDR when time permits.		It is hoped to add the waterfall capability to the BandViewer for the Airspy and RTL-SDR when time permits.

	=====Band Switching=====		=====Band and Input Switching=====

	When using the Pluto BandViewer, the 4 Portsdown band-switching lines can be controlled by the center frequency set on the BandViewer. To enable this capability, switch it on in the "system" menu. The exact frequency to band relationship then needs to be set by manually editing (using a text editor) the file /home/pi/rpidatv/src/plutoview/plutoview_bands.txt		When using the Pluto BandViewer, the 4 Portsdown band-switching lines can be controlled by the center frequency set on the BandViewer. To enable this capability, switch it on in the "system" menu. The exact frequency to band relationship then needs to be set by manually editing (using a text editor) the file /home/pi/rpidatv/src/plutoview/plutoview_bands.txt

			When Pluto BandViewer is selected, GPIO pin 21 is set high to enable a system inoput to be switched from a PicoTuner/MiniTiouner to the Pluto input.

	=====Portsdown 2020 with Waveshare 3.5 inch Screen and the RTL-SDR=====		=====Portsdown 2020 with Waveshare 3.5 inch Screen and the RTL-SDR=====

Portsdown 4 Signal Generator

G8GKQ — Wed, 04 Nov 2026 10:47:11 GMT

← Older revision		Revision as of 10:47, 4 November 2026
(4 intermediate revisions by the same user not shown)
Line 1:		Line 1:
	[[File:~~sgmenu1~~.~~jpg~~\|~~400px~~]][[File:sgmenu11.jpg\|400px]]		[[File:Sgmenu1.png\|800px]][[File:sgmenu11.jpg\|400px]]

	The Sig Gen is selected from a button on the top line of the Portsdown Menu 2. Selecting this takes you to the Sig Gen Menu. Here you can select the output device to use, a settings menu, or the main control page.		The Sig Gen is selected from a button on the top line of the Portsdown Menu 2. Selecting this takes you to the Sig Gen Menu. Here you can select the output device to use, a settings menu, or the main control page.

File:Sgmenu1.png

G8GKQ — Wed, 04 Nov 2026 10:36:40 GMT

G8GKQ uploaded File:Sgmenu1.png File uploaded with MsUpload

New page

Portsdown 4 Signal Generator

G8GKQ — Wed, 04 Nov 2026 10:32:55 GMT

Controlling an ADF4135-based Synthesizer

← Older revision		Revision as of 10:32, 4 November 2026
Line 52:		Line 52:

	The Portsdown 4 signal generator can also control an ADF4135-based Synthesizer. Pin connections: SPI Clock 29, SPI Data 31 and SPI Latch Enable 8.		The Portsdown 4 signal generator can also control an ADF4135-based Synthesizer. Pin connections: SPI Clock 29, SPI Data 31 and SPI Latch Enable 8.

			===Controlling the CMT2119A MicroSynth===

			Support for G4EML's MicroSynth (using the CMT2119A synthesizer IC) has been added to the Portsdown 4 Signal Generator. Connect the Clk to GPIO pin 29 (Portsdown standard interface pin 8) and the Data to GPIO pin 31 (Portsdown standard interface pin 9). Full details on this tiny 160 MHz to 1297 MHz synth with on-chip frequency memory here https://github.com/g4eml/MicroSynth. Thanks to Colin G4EML for doing all the hard work on this one.

BATC Wiki

G8GKQ — Wed, 04 Nov 2026 09:27:36 GMT

CONTENTS

← Older revision		Revision as of 09:27, 4 November 2026
(One intermediate revision by the same user not shown)
Line 1:		Line 1:
	'''Welcome to the British Amateur Television Club Wiki''' - the place to find information on all Amateur Television related equipment and projects. For details on how to join the BATC, the member's shop and CQ-TV archive and download visit the BATC website https://batc.org.uk/		'''Welcome to the British Amateur Television Club Wiki''' - the place to find information on all Amateur Television related equipment and projects. For details on how to join the BATC, the member's shop and CQ-TV archive and download visit the BATC website https://batc.org.uk/

	This is your site, developed by the BATC for use by the worldwide ATV community - any information which you feel is of use to others can be put on the Wiki but editing accounts are only available to trusted members. Please get in touch with any member of the BATC Committee if you have something of interest to post~~. Please do not request an account before contacting a member of the BATC Committee; requests without pre-approval are ignored~~.		This is your site, developed by the BATC for use by the worldwide ATV community - any information which you feel is of use to others can be put on the Wiki but editing accounts are only available to trusted members. Please get in touch with any member of the BATC Committee if you have something of interest to post.

	* New to Amateur TV - Get the basics on our [[Getting Started\|Getting Started page]]		* New to Amateur TV - Get the basics on our [[Getting Started\|Getting Started page]]
Line 11:		Line 11:
	* For the DATV equipment capability list go to [[DATV equipment capability\|https://wiki.batc.org.uk/DATV_equipment_capability]]		* For the DATV equipment capability list go to [[DATV equipment capability\|https://wiki.batc.org.uk/DATV_equipment_capability]]


	~~== Contents ==~~
	* [[Registering]] on the BATC wiki

	== New to Amateur TV? ==		== New to Amateur TV? ==

File:Site logo.gif

G8GKQ — Tue, 03 Nov 2026 16:30:40 GMT

G8GKQ uploaded File:Site logo.gif File uploaded with MsUpload

New page

File uploaded with MsUpload

RSGB Convention 2026

G8GKQ — Tue, 13 Oct 2026 09:55:12 GMT

Created page with "Dave G8GKQ presented on "Getting Started in ATV": Media:20261010 ATV Getting Started G8GKQ.pdf In the AMSAT-UK stream, Phil M0DNY gave an update on HamTV fronm the ISS w..."

New page

Dave G8GKQ presented on "Getting Started in ATV": [[:Media:20261010 ATV Getting Started G8GKQ.pdf]]

In the AMSAT-UK stream, Phil M0DNY gave an update on HamTV fronm the ISS which can be viewed on Youtube here: https://youtu.be/CS6i-xeDm7o?t=19450

File:20261010 ATV Getting Started G8GKQ.pdf

G8GKQ — Tue, 13 Oct 2026 09:53:25 GMT

G8GKQ uploaded File:20261010 ATV Getting Started G8GKQ.pdf File uploaded with MsUpload

New page

File uploaded with MsUpload

BATC Wiki

G8GKQ — Tue, 13 Oct 2026 09:52:09 GMT

National and International Events

← Older revision		Revision as of 09:52, 13 October 2026
Line 70:		Line 70:
	* [[ HAM RADIO 2022 ]] ATV Presentations from HAM RADIO 2022 at Friedrichshafen.		* [[ HAM RADIO 2022 ]] ATV Presentations from HAM RADIO 2022 at Friedrichshafen.

	* [[ RSGB Convention 2022 ]] ATV Presentation at the 2022 RSGB Convention ~~2022~~		* [[ RSGB Convention 2022 ]] ATV Presentation at the 2022 RSGB Convention

	* [[ HAM RADIO 2023 ]] ATV Presentations from HAM RADIO 2023 at Friedrichshafen.		* [[ HAM RADIO 2023 ]] ATV Presentations from HAM RADIO 2023 at Friedrichshafen.
Line 79:		Line 79:

	* [[ HAM RADIO 2025 ]] ATV Presentations from HAM RADIO 2025 at Friedrichshafen.		* [[ HAM RADIO 2025 ]] ATV Presentations from HAM RADIO 2025 at Friedrichshafen.

			* [[ RSGB Convention 2026 ]] ATV Presentation at the 2026 RSGB Convention

	==HAMTV on the ISS==		==HAMTV on the ISS==

User:M1RXO

G8GKQ — Mon, 12 Oct 2026 12:01:32 GMT

User account M1RXO was created by G8GKQ and password was sent by email Welcome to the BATC Wiki