VGP OSSC Pro User manual

OSSC Pro
Quick Start Guide
This document is copyright © VGP Media Ltd 2023
All rights reserved worldwide
VideoGameper ection.com is a trading name o VGP Media Ltd
Registered in Republic o Ireland number 637539

OSSC Pro Quick Start Guide VideoGamePer ection.com
OSSC Pro – Quick Start Guide
Contents
Important sa ety in ormation...........................................................................................................3
Overview..........................................................................................................................................4
Connectors and external controls ( ront).....................................................................................4
Connectors (le t side)..................................................................................................................5
Connectors (Right side)..............................................................................................................5
Connectors (Back).......................................................................................................................6
Remote control............................................................................................................................7
Connecting your OSSC Pro........................................................................................................8
Getting to know your OSSC Pro....................................................................................................10
One scaler, three modes............................................................................................................10
Changing modes........................................................................................................................12
Connecting consoles, PCBs or other hardware.........................................................................12
Scanlines...................................................................................................................................13
Setting output resolutions..........................................................................................................13
Framelock..................................................................................................................................15
Scaling algorithm......................................................................................................................15
Interlace video and the OSSC Pro.............................................................................................15
Fine tuning the image................................................................................................................16
Audio input and output.............................................................................................................16
Firmware updates...........................................................................................................................17
Troubleshooting.............................................................................................................................18
More in ormation......................................................................................................................19
Disposing o your OSSC Pro.........................................................................................................19
Thank you or purchasing the OSSC Pro. Please take time to read through this short document
be ore you start using the unit.
Page 2

Important safety information
Please observe the ollowing sa ety precautions when using your OSSC Pro.
Use the correct power supply – OSSC Pro is designed to run with a 5 volt, 2.1 x 5.5mm positive
tip power supply unit (PSU) supplying at least 2.5 amps o current. Please ensure your power
supply meets these requirements. Never connect a power supply that supplies more than 5 volts.
Doing so can damage the OSSC.
Turn off the power before connecting/disconnecting equipment – To prevent damage o the
OSSCs integrated circuits, always turn o the power be ore connecting to a display or a device.
Do not expose to moisture – Droplets o moisture may contact the PCB and cause a short circuit.
Never submerge the unit in water.
Keep away from fire or high heat sources – OSSC is not lammable but high temperatures, such
as those rom a ire or electric heater may melt the plastic casing.
Please supervise children – This product is not a toy and is not designed or use by children.
Please supervise children i they use the OSSC Pro.
eware of using the bob deinterlace mode on sources that display static graphics or text for a
long period of time – This deinterlacing mode produces a constant lickering e ect. This can cause
image retention/burn-in to occur aster than normal. Usually this applies to LCD TVs/monitors only,
CRT displays are not adversely a ected by this mode. We recommend using the scaler mode and
motion adaptive deinterlacing where possible, see page 15 or more details.

OSSC Pro Quick Start Guide VideoGamePer ection.com
Overview
OSSC Pro is a next generation video processor and scaler. The device is designed to take video
signals rom a range o older computers and video games consoles and convert and process these
signals so they are usable on modern, ixed resolution displays. While these modern displays are the
primary target o OSSC Pro, it also has the capability to convert newer video signals into ormats
that are more suitable or older displays, such as CRTs.
Connectors and external controls (front)
In the ront view picture you can see the ollowing eatures on your OSSC Pro.
US Port – For connecting and controlling external devices such as video switching hardware, or
connecting accessories (note, these eatures are not currently available but may be added in uture
irmware updates).
MicroSD Card Slot – For updating the devices irmware and storing display pro iles. See
“Firmware Updates” on page 17 or more in ormation.
IR Receiver – Receives commands rom the remote control unit. Line o sight is required.
OLED Display – Two line character display enables the user to navigate the OSSC Pro’s menus.
The display is particularly use ul i the user accidentally selects an incompatible output mode and
there ore cannot see the OSSC Pro’s on-screen menu.
Status LEDs – Indicate various unctions o the OSSC Pro. The top most LED will illuminate Red
when the OSSC Pro is in standby (all other LEDs will be o ). A Red and Green LED illuminated
together indicates an error condition with the current input. The middle LED will also blink when
an IR command is received.
Finally, the blue LED at the bottom illuminates when rame lock is active. Frame lock is discussed
on page 15.
Menu utton – Press this button to enter or exit the OSSC Pro’s menu. Press and hold this button
to toggle the OSSC between On and Standby.
Control Stick – Use the control stick to navigate through the OSSC Pro’s menus. Move the control
stick up, down, le t or right to navigate the menus. Click the control stick in to choose a menu
option. Press the Menu button to cancel your selection or exit the menus.
Page 4

Connectors (left side)
Expansion Connector – For adding expansion boards to the OSSC Pro. Expansion boards can add
new unctionality and input and output options.
Connectors ( ight side)
JTAG Connector - For so tware development purposes and irmware updates.
AV1 (SCART) Input – Connect an RGB SCART source to this input. Note the input must be RGB
or YPbPr, S-video and composite SCART sources are not supported and require transcoding into
RGB irst. Only European spec RGB SCART cables are supported, the less common Japanese JP21
cables must be used with a converter, a suitable one can be purchased here:-
https://videogameper ection.com/products/jp21-to-scart-adapter/

OSSC Pro Quick Start Guide VideoGamePer ection.com
Connectors (Back)
AV3 Audio input/output connector – This connector can be set to be an audio input (assignable to
AV1, AV2 or AV3) or as an audio output/break out rom AV1 SCART.
AV3 In – Standard D-Sub15 (VGA) connector. You can connect sources such as the Sega
Dreamcast or a retro gaming PC.
AV2 In – Connect component video or RGB with sync on green sources to this input.
AV2 Audio - Connect any analogue audio source to these two RCA connectors. This
audio input can be assigned to any video input.
SPDIF Input – For connecting high quality digital audio input rom compatible consoles or
devices. This audio input can also be assigned to any video input.
AV4 In – Connect a standard digital video source to this port. DVI sources will require an adapter.
Video Out – Connect a standard high de inition digital cable to this port and then connect the other
end o the cable to your television or monitor.
Power Connector – Connect a 5 volt, 2.1 x 5.5mm positive tip power supply unit (PSU) supplying
at least 2.5 amps o current. Note that use o the OSSC Classic power supply is not recommended
as it does not provide su icient amps or the OSSC Pro.
Page 6

emote control
The OSSC Pro uses a new, larger remote control to control all o its unctions. We will cover the
most important unctions in this guide, while you can learn about other eatures by visiting the
OSSC Pro Wiki page (https://junkerhq.net/xrgb/index.php?title=OSSC_Pro).
Info – Display in ormation about the current active
source and output mode.
Power – Toggles between On and Standby modes.
P-LM, A-LM, Scaler – Use these buttons to toggle
between the OSSC Pro’s three operating modes.
Keypad – Select the active input using these button
controls.
P.Load – Pro ile load. Use this button, ollowed by a
number on the keypad, to instantly load a display
pro ile.
Navigation – Use the Menu button to call up the OSSC
Pro’s menu. Use the directional arrows to navigate the
menu. Use the OK button to choose a menu option, or
enter a sub menu. Use the “Return” button to go back
up to the previous menu.
Scanline controls – Use these controls to adjust the
post processing scanlines, or to adjust image phase on
optimal pro iles. For more in ormation on this, consult
the wiki.
P1 to P9 – These buttons are reserved or uture use.
Scaler keys – These keys provide various shortcuts
when in scaler mode. The AR key can be pressed to
quickly select a new aspect ratio. The Zoom and Pan
buttons can be used to adjust the size o the image, or
move the image i it is o centre.

OSSC Pro Quick Start Guide VideoGamePer ection.com
Connecting your OSSC Pro
Connect a suitable power supply (5 volts, 2.5 amp positive tip) to the OSSC Pro’s power connector.
Connect a DVI or HDMI cable between the video out on the OSSC and your display. Almost any
display that supports HDMI or DVI-D can be used, but please remember some output modes do not
adhere ully to DVI/HDMI speci ications so compatibility cannot be guaranteed. For displays that
only have analogue inputs, a converter is required. OSSC Pro does not use HDCP, so any basic
converter should work.
Ensure the PSU is turned on at the wall, the red Standby light should then illuminate on the ront o
the unit. Power on your OSSC Pro using the power button on the remote control or by holding the
menu button on the ront o the unit. The OLED display on the ront o the unit should light up and
display “TP 480p”, as shown in the picture.
Switch your display to the correct input. I everything is working correctly, a grey test card pattern
should appear.
Page 8

Finally, power on your source device and press the Menu button on the OSSC remote. Use the
menu navigation buttons and OK to choose “Input Select” and then select the relevant input or
your console. For standard RGB SCART devices, choose “AV1_RGBS”. Component video sources
most commonly use “AV2_YpbPr”. VGA sources, such as a Sega Dreamcast, require
“AV3_RGBHV”. For digital video sources, choose “AV4”.
You should now see a picture rom your video device.
Congratulations, you have now set up your OSSC Pro and you can start experimenting with its
eatures.

OSSC Pro Quick Start Guide VideoGamePer ection.com
Getting to know your OSSC Pro
All settings or the OSSC Pro are con igured using the on-screen menu. To call up the menu at any
time, press the Menu button on the remote. The root or top level menu is shown below.
You can return to the top level menu at any time by pressing the “Return” button on the remote
(multiple presses may be required).
The menu is also shown on the ront OLED display, though navigating the menu on your
TV/monitor is usually easier and more convenient as more in ormation can be displayed.
One scaler, three modes
The OSSC Pro has three operating modes.
•Pure line multiplier
•Adaptive line multiplier
•Scaler
Pure and adaptive line multiplication modes o er a lag ree scaling solution or retro video
consoles, while the scaler mode o ers more lexible output options, at the expense o some input
lag.
We recommend users choose either adaptive line multiplication mode or scaler mode. Adaptive line
multiplication o ers many more options over the old, pure line multiplication that also eatured on
the classic OSSC. Theoretically, the pure line multiplication mode has slightly less input lag than
the adaptive mode, but in practise this di erence is so small that it is imperceptible. Re er to the
ollowing table or a summary o all the modes and their advantages and disadvantages.
Page 10

Pure LM Adaptive LM Scaler – framelock Scaler - no
framelock
Latency Max 2 lines Max 60 lines ~1 rame 1-2 rames
Display
compatibility Variable Very high Very high Full
Deinterlace alg.
Bob,
Noninterlace
restore
Bob,
Noninterlace
restore
Bob, Weave, Motion
adaptive
Bob, Weave,
Motion adaptive
Scaling alg. X: oversample,
integer Y: integer
X: oversample,
integer Y: integer
X: oversample,
polyphase Y:
polyphase
X: oversample,
polyphase Y:
polyphase
Input mode switch
delay Very ast Very ast Fast Instant
Transformations Pan Pan Zoom, Pan,
(Rotate*)
Zoom, Pan,
(Rotate*)
Postprocessing opt. Scanlines,
Border, Masks Scanlines, Masks Scanlines, Masks, BFI
Scanlines, Masks,
BFI
* The rotation unction is planned or a uture irmware update.

OSSC Pro Quick Start Guide VideoGamePer ection.com
Changing modes
To change between line multiplier and scaler mode, navigate to the top level menu and then select
“Output opt.” and press “OK”. you should now see the options shown below.
Use the le t and right navigation buttons on the remote to change between “Line multiplier” and
“Scaler”.
To change between adaptive and pure line multiplier mode, irst choose Line multiplier mode by
ollowing the steps above, then use the Return button on the remote, i necessary, to get back to the
top level menu.
Now, navigate to “Line multiplier opt” and press “OK”.
You can now use the remote to choose “Pure” or “Adaptive” mode. Adaptive mode is recommended
or most users.
Connecting consoles, PCBs or other hardware
Power your OSSC Pro o be ore you connect or disconnect external hardware. For the best results,
always use the best quality connection rom your source device to your OSSC Pro.
For most vintage or retro systems, using a properly wired RGB SCART cable connected to the AV1
input is the best and easiest option. I RGB is not available, component video (YPbPr) can be used
instead and will produce equally good results.
For any systems that output digital video (including systems with a ter-market modi ications), use a
digital cable with the AV4 input. Systems with a ter market modi ications may require you to put
them into “pass through” or “direct mode”, so that OSSC can handle any upscaling.
Systems which output only composite video or S-Video will require a converter or transcoder, such
as the Koryuu.
Page 12

You can connect almost any video source to the OSSC Pro. All analogue video ormats are
supported as well as most digital ormats (excluding 4k). More in ormation on connecting di erent
types o hardware is covered on the wiki.
Once you have connected your hardware, power on the OSSC Pro and select the appropriate input
using the remote. Now, power on your console, PCB or vintage computer hardware. You should
now see it displayed on your TV or monitor.
Scanlines
Vintage games consoles such as the Sega Megadrive and Nintendo SNES used a special screen
mode which resulted in alternating lines on a CRT display being le t blank. Typically when people
in the retro-gaming communities re er to scanlines, they mean the blank lines between parts o an
image on a CRT that were a result o this screen mode. OSSC Pro allows you to simulate these
scanlines, making the image look more authentic. You can enable or disable post-processing
scanlines on the OSSC Pro by pressing the Menu button on the remote and navigating to “Scanline
opt.”
You can also con igure various scanline settings by using the SL buttons on the remote.
In scaler mode, the OSSC Pro also supports custom scaling algorithms (see page 15 or more
in ormation). Some o these may add scanlines to the image as the image is scaled. In this case,
post-processing scanlines should be turned o .
How pronounced the scanlines would look on a real CRT varies greatly between displays, so set the
scanline strength to your taste.
Setting output resolutions
In line multiplication mode the OSSC Pro takes in one scanline and outputs two or more, resulting
in a lag ree conversion o 240p to 480p, 720p or higher.
To change the line multiplication output resolution, press the Menu button so that the on screen
menu is displayed and use the Return button i necessary to navigate to the top menu. Select “Line
multiplier opt” and press “OK”. The menu shown below will be displayed.
Choose “Pure LM opt.” or “Adaptive LM opt.” depending on the mode you are in, or this example
we will assume adaptive mode. The menu shown below will then appear.

OSSC Pro Quick Start Guide VideoGamePer ection.com
You can now choose the output resolution based on the input resolution. The most common input
resolutions are 240p or NTSC region retro consoles and 288p or PAL/European region consoles.
There is no right or wrong setting or the output resolution, results will vary based on the scaler and
processing in your television or monitor. Some users pre er a so ter, more natural CRT type look
while others pre er a sharper image.
You cannot damage your display by trying the di erent line multiplication modes. I your display
re uses to show a picture, simply use the remote to change to a di erent mode again.
I the OSSC Pro is set to scaler mode, the range o output resolutions is more lexible. Again, some
experimentation may be required to ind the best looking or most compatible modes or your
display.
Changing resolution in scaler mode works in much the same way, but is done by accessing “Scaler
opt.” rom the top level menu. This menu is shown in the picture below.
Page 14

Ensure “DFP output mode” is selected, then use the le t and right buttons on the remote to change
the resolution. You can also press “OK” to see a list o all supported resolutions.
Usually the best results in scaler mode are obtained by choosing the highest resolution supported by
your display. I you do not get a picture, or the picture intermittently disappears or blanks, choose a
lower resolution.
Framelock
Framelock (the ourth option down in the Scaler opt menu) is an important option to understand.
When Framelock is on, output re resh rate is matched to the input. This results in a smooth image
with no judder. While this is desirable, it may be necessary to turn Framelock o or the purpose o
compatibility or i your game title uses multiple screen modes (such as a game which uses interlace
in the menu screens but progressive modes during gameplay). In these cases, choose “O (50hz)”
or PAL material or “O (60hz)” or NTSC.
In line multipler modes, ramelock is always on and cannot be disabled.
Scaling algorithm
You can use this option to change the appearance o the scaled image. Generally, it is just a matter
o choosing which option you personally think looks the best. For more in ormation on these
options or to use the custom scaling algorithms, please visit the wiki.
Interlace video and the OSSC Pro
Certain retro consoles and computers (e.g Sony PS2, Nintendo Gamecube) output in interlace
modes. These modes send alternating scanlines to the display in each rame and were how standard
de inition analogue television was broadcast. To display interlace video on modern displays, it must
be deinterlaced irst.
In line multiplication mode, the OSSC Pro can deinterlace content like this with no input lag.

OSSC Pro Quick Start Guide VideoGamePer ection.com
However, the image that is produced tends to exhibit some lickering and combing arte acts.
I the licker is distracting, we recommend you use the scaler mode and the motion adaptive
deinterlacer. To activate the motion adaptive deinterlacer, ollow these steps.
1) First ensure you are in scaler mode. See “Changing modes” on page 12 to con irm.
2) On the main menu, navigate to “Scaler Opt.” and press OK.
3) Navigate to “Deinterlace mode” and choose “Motion adaptive”.
4) I your game changes between interlace and non-interlace during play, you may also need to
disable Framelock, choose “O (50hz)” or PAL material or “O (60hz)” or NTSC.
Try to avoid interlace so tware and modes where possible. I your so tware title supports
progressive or 480p mode then be sure to enable this.
eware of using the OSSC Pro’s bob deinterlacer on sources that display static graphics or
text for a long period of time. On certain types o display, the constant lickering can cause image
retention/burn-in to occur aster than normal. Usually this applies to LCD TVs/monitors only, CRT
displays are not adversely a ected by this mode.
Fine tuning the image
Just like with the OSSC Classic, it is possible to ine tune image settings using the advanced timing
options. For most sources, ine tuning the image is not necessary and you will get excellent results
with the de aults, but i you are interested in learning more about ine tuning, please visit the wiki
page and also our support orums here:-
https://videogameper ection.com/ orums/ orum/ossc/ossc-discussion-support/
Audio input and output
The OSSC Pro’s analogue audio inputs and the SPDIF input are all ully assignable. For example, i
you have a source such as a Sega Dreamcast, which has a D-Sub 15 video output and 2 x RCA
audio outputs, you can connect the video output o the console to the AV3 input, and the audio to
the AV2 RCA audio inputs.
It is then simply a matter o assigning the audio input AV2 to the video input AV3. To do so, open
the OSSCs menu and use the “Return” button, i necessary, to get to the top most level. Then,
choose “Audio opt.”. The resulting menu is shown below.
Page 16

Using this menu you can assign di erent audio inputs to di erent video inputs. For example, to use
the AV2 RCA audio inputs with AV3 (VGA/D-Sub 15), you simply select “AV3 audio source” and
change it to “AV2 (analogue)”.
Note that it is not possible to assign AV4 (digital) audio to any other input.
Remember, routing your OSSCs video output through equipment such as home theatre receivers or
video processors can in many instances add input lag. Routing the signal through home theatre
receivers, switches, splitters, audio integrators or other video processors can also increase the time it
takes to re-sync the signal on game titles which switch between 480i and 240p screen modes.
Firmware updates
New eatures are periodically added to the OSSC Pro in the orm o irmware updates. The devices
irmware can be updated using an MicroSD card. Unlike the OSSC Classic, no special tool is
required to write the irmware update to the card. All that is needed is a FAT32 ormatted MicroSD
card. Firmware updates are typically no bigger than 3MB, so any capacity card will su ice.
To update the irmware, remove your MicroSD card rom the OSSC Pro, insert it into your
computers SD card reader and then copy over the new irmware ile. Ensure that the irmware ile is
renamed to “ossc_pro.bin”.
Once the irmware is copied over, re-insert the MicroSD card into the OSSC Pro and power on the
device. Open the on-screen menu and choose “Settings” and then “Fw. Update”. Follow the on-
screen prompts in order to update the irmware.
To check or the latest irmware, visit this page:-
https://junkerhq.net//xrgb/index.php?title=OSSC_Pro#Firmware_update

OSSC Pro Quick Start Guide VideoGamePer ection.com
Troubleshooting
Symptom Possible Cause Solution
Image has a vertical licker/shimmer
e ect
Interlace source connected Set deinterlace mode to motion
adaptive, see page 15.
Horizontal jitter/wobble on image Fine tuning required Try adjusting low pass ilter settings.
See the wiki or recommendations
Missing pixels in the image Wrong optimal mode selected Use generic 4:3 or Generic 16:9 mode
instead
No audio Display incompatibility Use a di erent display or choose a
di erent output mode
No audio Sample mode incompatible Change the Sampling ormat under
“Audio options” to 24bit/48kHz
No image Sync mode set wrong Press the source button again to
change sync mode. Most common
sync type is RGBs or SCART, YPbPr
or component and RGBHV or
DSub15/VGA
No image Incompatible output mode selected Switch to a compatible mode.
No image HDMI/DVI handshake ailed Power cycle the OSSC Pro
Black screen and NO SYNC message Source not powered on Check power to source device
Black screen and NO SYNC message Source not outputting RGBs or
YPbPr
Make sure your source device outputs
RGB and your SCART cable is wired
or RGB.
Page 18

More information
For more in ormation on using your OSSC Pro, see the Wiki page here –
https://junkerhq.net//xrgb/index.php?title=OSSC Pro
For technical support, visit the support orums here -
https://www.videogameper ection.com/ orums/ orum/ossc/
Disposing of your OSSC Pro
I your OSSC Pro mal unctions, please contact us via e-mail or through our
website to arrange repair or replacement. All OSSC Pro units sold by
VideogamePer ection.com/VGP Media come with one years warranty. Outside o
warranty, we can service and repair most aulty units.
Please consider contacting us be ore disposing o your OSSC Pro, even i you no
longer want it. I you do need to dispose o the unit, in most countries you can
recycle the unit or ree at your local recycling centre. To ind your nearest centre in the UK, visit
the Recycle More website at http://www.recycle-more.co.uk and type in your postcode. In the
Republic o Ireland, visit https://www.weeeireland.ie/household-recycling/where-can-i-recycle/
I you live outside o the UK or ROI, please check with local authorities or contact us to arrange or
a return o your unit.