Re: How to display installed options screen on a HP 8920A
You need to test the signal generator output at 1MHz (or less) to be sure of attenuator type.
For? a 8920A the Firmware is in ROMs. I don't know of an image available.
The memory card slot in the 8920A takes "Epson" style Ram or ROM cards. These are NOT PCMCIA cards. They use a side contact connector a bit like an edge connector covered by a shutter. Similar cards were used in the HP 48GX calculator but I don't know if they are compatible. I have heard of clone cards being made (certainly for the calculator) but have not seen firm evidence of them working in the 8920A.?
Even if you buy an HP RAM card you still have the problem of writing to it. (the ROM cards are one time programmed)
The best option is to load the software through the serial port. See the thread on here about reading configuration data for some ideas on how to do this. Basically you set up the 8920x to receive a file as ASCII text as if you were typing it at a serial terminal.
Good luck.
|
Re: How to display installed options screen on a HP 8920A
Isn't this card imaged on files area? PS: I'll now have to look for "HP 11807A opt 100 (RF Tools)", instead of the "HP 11807E opt 100 (RF Tools)" I bought the other week thinking that I'd buying a 8920B later on.--
|
Re: How to display installed options screen on a HP 8920A
Hi George
I was hoping to get one that covers the whole of the HF spectrum
:-)
I'd like to update its firmware (only if doesn't cause any other
problems).
I also have RF tools on a card for a 8920B, so I need to get them
transferred to a card I can use in an 8920A.
I believe the 8920A is an early SRAM card (maybe PCMCIA type 1)
that Epson use to use in their printers.
Best Regards
Danny
On 20/01/2021 21:42, george edmonds via groups.io wrote:
toggle quoted message
Show quoted text
Hi Danny
The serial number says that it was manufactured between 1998 and
1999 is Scotland, so you should be lucky and have the
electo-mechanical input assembly and it will go down to 400KHz
73 George G6HIG Dover UK
On Wednesday, 20 January 2021, 20:23:59 GMT, DANIEL
RAFFERTY <daniel1967@...> wrote:
Hello George
The sticker on the rear has serial No 3427Uxxxxx and
the start screen has the manufacture date as 1990-94.
Attached screen shot for the installed options, got at
by using your instructions :-)
Best Regards
Danny G7TTR
On 19/01/2021 00:37, george edmonds via groups.io
wrote:
Hi Danny
Do you know the first five characters of the serial
number, Generally 8920A's manufactured before
1999/2000 have an electro-mechanical input assembly
(attenuator) and will work down to 400Khz. After
1999/2000 they were "improved" with a PIN diode
input assembly which HP specs down to 30MHz (it
works down to about 11MHz and then falls off a
cliff)
Option 055 in a later 8920A restores the
electro-mechanical input assembly, so is critical if
you want to work below about 15MHz. DO NOT BELIEVE
THE FREQUENCY RANGE LABEL ON THE FRONT.
Options 001 and 102 are nice with 102 being
essential.
ALL 8920B's, unless they have option 055 have a
lower specified limit of 30MHz.
73 George G6HIG Dover UK
On Tuesday, 19 January 2021, 00:13:17 GMT,
DANIEL RAFFERTY <daniel1967@...>
wrote:
Hello
George
Thank you, you've saved me from heaps of
digging through pdf's
I think the instructions are fairly
straight forward, so no need to dig out
your 8920A.
I'll just cut and paste them into an email
to the seller.
What options would you recommend that the
8920A be fitted with if you wanted to work
on HAM transceivers and homebrew items.
The one I have purchased comes with the
following options :-
001 (High stability reference)
003 (GPIB / RS232 interface)
004 (Audio Signaling)
005 I believe this
is a 512K memory upgrade
011 (CCITT Filter)
102 (Spectrum Analyzer)
In time, I'm thinking of swapping out 003
for 103 (GPIB / RS232 interface /
Parallel)
Possibly also swapping 011 for one of the
other filters, not sure which one yet.
The final thought would be up the power
i/p from the standard 60W to 100W with opt
016.
For the moment I just happy I'll get my
hands on a HP8920A
Best Regards
Danny G7TTR
PS: I'll now have to look for "HP 11807A
opt 100 (RF Tools)", instead of the "HP
11807E opt 100 (RF Tools)" I bought the
other week thinking that I'd buying a
8920B later on.
On 18/01/2021 23:44, george edmonds via
groups.io wrote:
Try this
To check your installed options:
1) Press the ¡°TESTS¡± button,
2) Select ¡°ROM¡± under procedure location
3) Select LIST_OPTS under procedure
4) Select RUN
5) The HP8920A will now list the
included options on the screen
If necessary I can dig out my HP8920A
and photograph the procedure
George G6HIG Dover UK
On Monday, 18 January 2021,
23:18:05 GMT, DANIEL RAFFERTY <daniel1967@...>
wrote:
Hello HP8920 hive
mind :-)
I am asking a seller
to get me a photo of the installed
options/firmware
screen of an 8920A i
have just bought.
He has given me the
options from the rear label, but
the options could
have been removed and
the label left unchanged.
To be on the safe
side, I want to see a photo of the
installed on the
instruments display.
How do I instruct
someone remotely on how to get
display installed
options screen on a
HP 8920A? (see attached photo of a
different 8920A
from an ebay auction)
I just need to know
the correct chain of key presses
on the instrument
to get to that
screen.
Best Regards
Danny G7TTR
|
Re: How to display installed options screen on a HP 8920A
Hi Danny
The serial number says that it was manufactured between 1998 and 1999 is Scotland, so you should be lucky and have the electo-mechanical input assembly and it will go down to 400KHz
73 George G6HIG Dover UK On Wednesday, 20 January 2021, 20:23:59 GMT, DANIEL RAFFERTY <daniel1967@...> wrote:
Hello George
The sticker on the rear has serial No 3427Uxxxxx and the start screen has the manufacture date as 1990-94.
Attached screen shot for the installed options, got at by using your instructions :-)
Best Regards
Danny G7TTR
On 19/01/2021 00:37, george edmonds via groups.io wrote:
Hi Danny
Do you know the first five characters of the serial number, Generally 8920A's manufactured before 1999/2000 have an electro-mechanical input assembly (attenuator) and will work down to 400Khz. After 1999/2000 they were "improved" with a PIN diode input assembly which HP specs down to 30MHz (it works down to about 11MHz and then falls off a cliff)
Option 055 in a later 8920A restores the electro-mechanical input assembly, so is critical if you want to work below about 15MHz. DO NOT BELIEVE THE FREQUENCY RANGE LABEL ON THE FRONT.
Options 001 and 102 are nice with 102 being essential.
ALL 8920B's, unless they have option 055 have a lower specified limit of 30MHz.
73 George G6HIG Dover UK On Tuesday, 19 January 2021, 00:13:17 GMT, DANIEL RAFFERTY <daniel1967@...> wrote:
Hello George
Thank you, you've saved me from heaps of digging through pdf's
I think the instructions are fairly straight forward, so no need to dig out your 8920A.
I'll just cut and paste them into an email to the seller.
What options would you recommend that the 8920A be fitted with if you wanted to work on HAM transceivers and homebrew items.
The one I have purchased comes with the following options :-
001 (High stability reference)
003 (GPIB / RS232 interface)
004 (Audio Signaling)
005 I believe this is a 512K memory upgrade
011 (CCITT Filter)
102 (Spectrum Analyzer)
In time, I'm thinking of swapping out 003 for 103 (GPIB / RS232 interface / Parallel)
Possibly also swapping 011 for one of the other filters, not sure which one yet.
The final thought would be up the power i/p from the standard 60W to 100W with opt 016.
For the moment I just happy I'll get my hands on a HP8920A
Best Regards
Danny G7TTR
PS: I'll now have to look for "HP 11807A opt 100 (RF Tools)", instead of the "HP 11807E opt 100 (RF Tools)" I bought the other week thinking that I'd buying a 8920B later on.
On 18/01/2021 23:44, george edmonds via groups.io wrote:
Try this
To check your installed options:
1) Press the ¡°TESTS¡± button,
2) Select ¡°ROM¡± under procedure location
3) Select LIST_OPTS under procedure
4) Select RUN
5) The HP8920A will now list the included options on the screen
If necessary I can dig out my HP8920A and photograph the procedure
George G6HIG Dover UK On Monday, 18 January 2021, 23:18:05 GMT, DANIEL RAFFERTY <daniel1967@...> wrote:
Hello HP8920 hive mind :-)
I am asking a seller to get me a photo of the installed options/firmware
screen of an 8920A i have just bought.
He has given me the options from the rear label, but the options could
have been removed and the label left unchanged.
To be on the safe side, I want to see a photo of the installed on the
instruments display.
How do I instruct someone remotely on how to get display installed
options screen on a HP 8920A? (see attached photo of a different 8920A
from an ebay auction)
I just need to know the correct chain of key presses on the instrument
to get to that screen.
Best Regards
Danny G7TTR
|
Re: How to display installed options screen on a HP 8920A
Hello George
The sticker on the rear has serial No 3427Uxxxxx and the start
screen has the manufacture date as 1990-94.
Attached screen shot for the installed options, got at by using
your instructions :-)
Best Regards
Danny G7TTR
On 19/01/2021 00:37, george edmonds via groups.io wrote:
toggle quoted message
Show quoted text
Hi Danny
Do you know the first five characters of the serial number,
Generally 8920A's manufactured before 1999/2000 have an
electro-mechanical input assembly (attenuator) and will work
down to 400Khz. After 1999/2000 they were "improved" with a PIN
diode input assembly which HP specs down to 30MHz (it works down
to about 11MHz and then falls off a cliff)
Option 055 in a later 8920A restores the electro-mechanical
input assembly, so is critical if you want to work below about
15MHz. DO NOT BELIEVE THE FREQUENCY RANGE LABEL ON THE FRONT.
Options 001 and 102 are nice with 102 being essential.
ALL 8920B's, unless they have option 055 have a lower specified
limit of 30MHz.
73 George G6HIG Dover UK
On Tuesday, 19 January 2021, 00:13:17 GMT, DANIEL
RAFFERTY <daniel1967@...> wrote:
Hello George
Thank you, you've saved me from heaps of digging
through pdf's
I think the instructions are fairly straight forward,
so no need to dig out your 8920A.
I'll just cut and paste them into an email to the
seller.
What options would you recommend that the 8920A be
fitted with if you wanted to work on HAM transceivers
and homebrew items.
The one I have purchased comes with the following
options :-
001 (High stability reference)
003 (GPIB / RS232 interface)
004 (Audio Signaling)
005 I believe this is a 512K
memory upgrade
011 (CCITT Filter)
102 (Spectrum Analyzer)
In time, I'm thinking of swapping out 003 for 103
(GPIB / RS232 interface / Parallel)
Possibly also swapping 011 for one of the other
filters, not sure which one yet.
The final thought would be up the power i/p from the
standard 60W to 100W with opt 016.
For the moment I just happy I'll get my hands on a
HP8920A
Best Regards
Danny G7TTR
PS: I'll now have to look for "HP 11807A opt 100 (RF
Tools)", instead of the "HP 11807E opt 100 (RF Tools)"
I bought the other week thinking that I'd buying a
8920B later on.
On 18/01/2021 23:44, george edmonds via groups.io
wrote:
Try this
To check your installed options:
1) Press the ¡°TESTS¡± button,
2) Select ¡°ROM¡± under procedure location
3) Select LIST_OPTS under procedure
4) Select RUN
5) The HP8920A will now list the included options on
the screen
If necessary I can dig out my HP8920A and photograph
the procedure
George G6HIG Dover UK
On Monday, 18 January 2021, 23:18:05 GMT,
DANIEL RAFFERTY <daniel1967@...>
wrote:
Hello HP8920 hive mind :-)
I am asking a seller to get me a
photo of the installed options/firmware
screen of an 8920A i have just
bought.
He has given me the options from
the rear label, but the options could
have been removed and the label
left unchanged.
To be on the safe side, I want to
see a photo of the installed on the
instruments display.
How do I instruct someone
remotely on how to get display installed
options screen on a HP 8920A?
(see attached photo of a different 8920A
from an ebay auction)
I just need to know the correct
chain of key presses on the instrument
to get to that screen.
Best Regards
Danny G7TTR
|
Re: How to display installed options screen on a HP 8920A
Hello Robert
Now all I have to do is figure a way of using the RF Tools on the
PCMCIA card I recently bought on a 8920A rather than the 8920B I
was hoping to get.
The sticker on the rear has serial No 3427Uxxxxx and the start
screen has the manufacture date as 1990-94.
Attached screen shot for the installed options.
Thank you for the advice :-)
I'd prefer an internal attenuator but I already have a big feck
off external attenuator available if I need it.
Best Regards
Danny G7TTR
On 19/01/2021 11:35, Robert G8RPI via groups.io wrote:
toggle quoted message
Show quoted text
Hi Danny,
You got that one for a good price. Our friends across the pond pay
a lot more than $1025 :-)
You should run the IODIAG2 test from the ROM
tests list if it is present in your test set's firmware. It
gives lower level information on the hardware installed.
The parallel I/F option may not be applicable to your unit
depending on what standard of hardware is fitted. In any case a
serial to USB adaptor is probably more useful for screen capture
to a PC unless you have a parallel printer already. There is a
handy serial screen capture utility, BTS, that works OK.
It is probably better (and cheaper) to use an external power
attenuator than fit the 100W option. duming that extra 40W into
the test set does not help reliability.
Robert G8RPI.
|
And it became a blog post =)
|
Re: How to display installed options screen on a HP 8920A
Hi Danny,
You got that one for a good price. Our friends across the pond pay a lot more than $1025 :-)
You should run the IODIAG2 test from the ROM tests list if it is present in your test set's firmware. It gives lower level information on the hardware installed.
The parallel I/F option may not be applicable to your unit depending on what standard of hardware is fitted. In any case a serial to USB adaptor is probably more useful for screen capture to a PC unless you have a parallel printer already. There is a handy serial screen capture utility, BTS, that works OK.
It is probably better (and cheaper) to use an external power attenuator than fit the 100W option. duming that extra 40W into the test set does not help reliability.
Robert G8RPI.
|
On Monday, January 18, 2021, 11:36:26 PM EST, Alexandre Souza <alexandre.tabajara@...> wrote:
Oh, it worked! It was a problem with the LM1881 supply. Thanks a lot, Ralph!
?
---8<---Corte aqui---8<---
---8<---Corte aqui---8<---
|
Re: How to display installed options screen on a HP 8920A
Hi Daniel
I should also say that the ONLY way that you can be absolutely certain of the frequency range of a HP8920A or a HP8920B is to measure it, so many changes to then have been made by past owners.
George G6HIG Dover UK On Tuesday, 19 January 2021, 00:13:17 GMT, DANIEL RAFFERTY <daniel1967@...> wrote:
Hello George
Thank you, you've saved me from heaps of digging through pdf's
I think the instructions are fairly straight forward, so no need to dig out your 8920A.
I'll just cut and paste them into an email to the seller.
What options would you recommend that the 8920A be fitted with if you wanted to work on HAM transceivers and homebrew items.
The one I have purchased comes with the following options :-
001 (High stability reference)
003 (GPIB / RS232 interface)
004 (Audio Signaling)
005 I believe this is a 512K memory upgrade
011 (CCITT Filter)
102 (Spectrum Analyzer)
In time, I'm thinking of swapping out 003 for 103 (GPIB / RS232 interface / Parallel)
Possibly also swapping 011 for one of the other filters, not sure which one yet.
The final thought would be up the power i/p from the standard 60W to 100W with opt 016.
For the moment I just happy I'll get my hands on a HP8920A
Best Regards
Danny G7TTR
PS: I'll now have to look for "HP 11807A opt 100 (RF Tools)", instead of the "HP 11807E opt 100 (RF Tools)" I bought the other week thinking that I'd buying a 8920B later on.
On 18/01/2021 23:44, george edmonds via groups.io wrote:
Try this
To check your installed options:
1) Press the ¡°TESTS¡± button,
2) Select ¡°ROM¡± under procedure location
3) Select LIST_OPTS under procedure
4) Select RUN
5) The HP8920A will now list the included options on the screen
If necessary I can dig out my HP8920A and photograph the procedure
George G6HIG Dover UK On Monday, 18 January 2021, 23:18:05 GMT, DANIEL RAFFERTY <daniel1967@...> wrote:
Hello HP8920 hive mind :-)
I am asking a seller to get me a photo of the installed options/firmware
screen of an 8920A i have just bought.
He has given me the options from the rear label, but the options could
have been removed and the label left unchanged.
To be on the safe side, I want to see a photo of the installed on the
instruments display.
How do I instruct someone remotely on how to get display installed
options screen on a HP 8920A? (see attached photo of a different 8920A
from an ebay auction)
I just need to know the correct chain of key presses on the instrument
to get to that screen.
Best Regards
Danny G7TTR
|
Oh, it worked! It was a problem with the LM1881 supply. Thanks a lot, Ralph!
?
---8<---Corte aqui---8<---
---8<---Corte aqui---8<---
|
Re: How to display installed options screen on a HP 8920A
The SA and signalling option are the only ones I consider required.
The high stability means longer warm up time to come on frequency and with the?
cheap availability of GPS locked references not sure I would worry about that one.
standard audio filtering should be adequate
The test to display the installed HW and options may vary by firmware release.
I usually have to look at the list of available tests to see which ones are installed...more than one
|
Re: How to display installed options screen on a HP 8920A
Hi Danny
Do you know the first five characters of the serial number, Generally 8920A's manufactured before 1999/2000 have an electro-mechanical input assembly (attenuator) and will work down to 400Khz. After 1999/2000 they were "improved" with a PIN diode input assembly which HP specs down to 30MHz (it works down to about 11MHz and then falls off a cliff)
Option 055 in a later 8920A restores the electro-mechanical input assembly, so is critical if you want to work below about 15MHz. DO NOT BELIEVE THE FREQUENCY RANGE LABEL ON THE FRONT.
Options 001 and 102 are nice with 102 being essential.
ALL 8920B's, unless they have option 055 have a lower specified limit of 30MHz.
73 George G6HIG Dover UK On Tuesday, 19 January 2021, 00:13:17 GMT, DANIEL RAFFERTY <daniel1967@...> wrote:
Hello George
Thank you, you've saved me from heaps of digging through pdf's
I think the instructions are fairly straight forward, so no need to dig out your 8920A.
I'll just cut and paste them into an email to the seller.
What options would you recommend that the 8920A be fitted with if you wanted to work on HAM transceivers and homebrew items.
The one I have purchased comes with the following options :-
001 (High stability reference)
003 (GPIB / RS232 interface)
004 (Audio Signaling)
005 I believe this is a 512K memory upgrade
011 (CCITT Filter)
102 (Spectrum Analyzer)
In time, I'm thinking of swapping out 003 for 103 (GPIB / RS232 interface / Parallel)
Possibly also swapping 011 for one of the other filters, not sure which one yet.
The final thought would be up the power i/p from the standard 60W to 100W with opt 016.
For the moment I just happy I'll get my hands on a HP8920A
Best Regards
Danny G7TTR
PS: I'll now have to look for "HP 11807A opt 100 (RF Tools)", instead of the "HP 11807E opt 100 (RF Tools)" I bought the other week thinking that I'd buying a 8920B later on.
On 18/01/2021 23:44, george edmonds via groups.io wrote:
Try this
To check your installed options:
1) Press the ¡°TESTS¡± button,
2) Select ¡°ROM¡± under procedure location
3) Select LIST_OPTS under procedure
4) Select RUN
5) The HP8920A will now list the included options on the screen
If necessary I can dig out my HP8920A and photograph the procedure
George G6HIG Dover UK On Monday, 18 January 2021, 23:18:05 GMT, DANIEL RAFFERTY <daniel1967@...> wrote:
Hello HP8920 hive mind :-)
I am asking a seller to get me a photo of the installed options/firmware
screen of an 8920A i have just bought.
He has given me the options from the rear label, but the options could
have been removed and the label left unchanged.
To be on the safe side, I want to see a photo of the installed on the
instruments display.
How do I instruct someone remotely on how to get display installed
options screen on a HP 8920A? (see attached photo of a different 8920A
from an ebay auction)
I just need to know the correct chain of key presses on the instrument
to get to that screen.
Best Regards
Danny G7TTR
|
Re: How to display installed options screen on a HP 8920A
Hello George
Thank you, you've saved me from heaps of digging through pdf's
I think the instructions are fairly straight forward, so no need
to dig out your 8920A.
I'll just cut and paste them into an email to the seller.
What options would you recommend that the 8920A be fitted with if
you wanted to work on HAM transceivers and homebrew items.
The one I have purchased comes with the following options :-
001 (High stability
reference)
003 (GPIB / RS232
interface)
004 (Audio
Signaling)
005 I believe this is a 512K memory upgrade
011 (CCITT Filter)
102 (Spectrum
Analyzer)
In time, I'm thinking of swapping out 003 for 103 (GPIB / RS232
interface / Parallel)
Possibly also swapping 011 for one of the other filters, not sure
which one yet.
The final thought would be up the power i/p from the standard 60W
to 100W with opt 016.
For the moment I just happy I'll get my hands on a HP8920A
Best Regards
Danny G7TTR
PS: I'll now have to look for "HP 11807A opt 100 (RF Tools)",
instead of the "HP 11807E opt 100 (RF Tools)" I bought the other
week thinking that I'd buying a 8920B later on.
On 18/01/2021 23:44, george edmonds via groups.io wrote:
toggle quoted message
Show quoted text
Try this
To check your installed options:
1) Press the ¡°TESTS¡± button,
2) Select ¡°ROM¡± under procedure location
3) Select LIST_OPTS under procedure
4) Select RUN
5) The HP8920A will now list the included options on the screen
If necessary I can dig out my HP8920A and photograph the
procedure
George G6HIG Dover UK
On Monday, 18 January 2021, 23:18:05 GMT, DANIEL
RAFFERTY <daniel1967@...> wrote:
Hello HP8920 hive mind :-)
I am asking a seller to get me a photo of the
installed options/firmware
screen of an 8920A i have just bought.
He has given me the options from the rear
label, but the options could
have been removed and the label left
unchanged.
To be on the safe side, I want to see a photo
of the installed on the
instruments display.
How do I instruct someone remotely on how to
get display installed
options screen on a HP 8920A? (see attached
photo of a different 8920A
from an ebay auction)
I just need to know the correct chain of key
presses on the instrument
to get to that screen.
Best Regards
Danny G7TTR
|
Re: How to display installed options screen on a HP 8920A
Try this
To check your installed options:
1) Press the ¡°TESTS¡± button,
2) Select ¡°ROM¡± under procedure location
3) Select LIST_OPTS under procedure
4) Select RUN
5) The HP8920A will now list the included options on the screen
If necessary I can dig out my HP8920A and photograph the procedure
George G6HIG Dover UK On Monday, 18 January 2021, 23:18:05 GMT, DANIEL RAFFERTY <daniel1967@...> wrote:
Hello HP8920 hive mind :-)
I am asking a seller to get me a photo of the installed options/firmware
screen of an 8920A i have just bought.
He has given me the options from the rear label, but the options could
have been removed and the label left unchanged.
To be on the safe side, I want to see a photo of the installed on the
instruments display.
How do I instruct someone remotely on how to get display installed
options screen on a HP 8920A? (see attached photo of a different 8920A
from an ebay auction)
I just need to know the correct chain of key presses on the instrument
to get to that screen.
Best Regards
Danny G7TTR
|
Here is what I did. ?While it does not have anything to do with it working, I used one of the DC to DC ?converters that takes any reasonable voltage and will lower it to a value set by a pot on the board to give 5 volts to the video boards. ?I used a 12 volt wall cube to power the unit and that DC to DC converter to get to 5 volts for both the video board and the lm1881.
Looking at the video board with the 3 yellow pots and the inputs nearest you. ?Calling it pin 1 with a black wire, ?Ground that wire. pin 2 and 3 are empty. ?Pin 4 (yellow wire) not connected. ? Pin 5 ?(grey) goes to pin 1 of the lm1881. ?Pin6 (blue) not connected. ?Pin 7 ( green) to the video input coming from the center of the BNC ?of the 8924C. ? Pin 8 (red) not connected.
Looking at the data sheet for the Lm1881. ?Pin 1 goes to the grey wire coming from Pin 5 of the video board (see above for the same wire) ?Pin 2 has a .1 uF capacitor going to the video from the 8924, it is also to the green wire on pin 7 from above.
PIn 3 not connected. ? Pin 4 Ground. ?Pin 5 not connected.
PIn 6 has a 680 ?K resistor and a .1 uF in parallel going to ground.
Pin 7 not connected. ?Pin 8 goes to the 5 volts power supply.
I used the small 2 pin power connector on the video board for the power for that board and supplied it with 5 volts and a ground.?
Be sure to put the 50 K ohm resistors on capacitors 29,32,33,36 on the video board. ?Without those resistors the board looked like it was working but went all green after about 2 minutes. ?
Put a VGA monitor on the video output of the board and a BNC connector from the output of the 8924.
You will have to work your way through the menus on the video board to get it to correctly center on the screen. ?
I am thinking that if you hook the red, green and blue wires on the video board connector together you can get a white screen instead of green ,but never tried it.??
Ralph ku4pt
On Monday, January 18, 2021, 05:47:44 PM EST, Alexandre Souza <alexandre.tabajara@...> wrote:
I'm waiting for my GBS card to arrive and test it. By the photos you need a sync separator, so I connected a LM1881 chip to extract h-sync and v-sync, and I'll test it on RGB input (as a MDA signal, since the sync rate is near) and in the component input G signal (which should already have sync on that), Lets see what happens =)
|
How to display installed options screen on a HP 8920A
Hello HP8920 hive mind :-)
I am asking a seller to get me a photo of the installed options/firmware screen of an 8920A i have just bought.
He has given me the options from the rear label, but the options could have been removed and the label left unchanged.
To be on the safe side, I want to see a photo of the installed on the instruments display.
How do I instruct someone remotely on how to get display installed options screen on a HP 8920A? (see attached photo of a different 8920A from an ebay auction)
I just need to know the correct chain of key presses on the instrument to get to that screen.
Best Regards
Danny G7TTR
|
Tried the GBS 8200 V4.0, CDMA service monitor E8285A. My results:
- Composite video into the Y input...No signal
- Composite video thru a LM1881 sync separator, video as G, HSync as Sync...No signal
- Composite video thru a LM1881 sync separator, video as G, Hsync as Hsync, VSync as VSync...No signal
Board working at 5.0V measured on board, works ok with composite video from an Amiga 600 on Y input of the board. Inputs changed with the left button as needed (YPbPr/RGBS/RGBHV).
Tried another scaler, Ambery AV-1 (also known as AV-1M)
- Composite video into the Y input - Perfect signal on screen, but wasn't able to fit entire signal on screen. This list allows attachments? I can send a photo.
Any tips? I will blog the results ASAP.
|
I'm waiting for my GBS card to arrive and test it. By the photos you need a sync separator, so I connected a LM1881 chip to extract h-sync and v-sync, and I'll test it on RGB input (as a MDA signal, since the sync rate is near) and in the component input G signal (which should already have sync on that), Lets see what happens =)
?
---8<---Corte aqui---8<---
---8<---Corte aqui---8<---
Em sex., 15 de jan. de 2021 ¨¤s 21:13, sv1mne < sv1mne@...> escreveu:
I see some very interesting photos? of the HP8924C with GBS8220 Video Converter. (mostly from wb7dmx and others, transferred from the old Yahoo! group)
In some of them it seems the GBS8220 was modified with some extra connections added to the main FPGA chip and also a Sync separator in an external PCB.
?
If anybody has used this configuration, please post some more information on the connections and settings used.
|
Hi,
?
I see some very interesting photos? of the HP8924C with GBS8220 Video Converter. (mostly from wb7dmx and others, transferred from the old Yahoo! group)
In some of them it seems the GBS8220 was modified with some extra connections added to the main FPGA chip and also a Sync separator in an external PCB.
?
If anybody has used this configuration, please post some more information on the connections and settings used.
?
Thank you in advance
?
wb7dmx
|
Alexandre Souza
sv1mne