Driver to drive?

[Phil Hobbs]

On 6/23/19 7:14 AM, Winfield Hill wrote:

arjen@personalrecharge.com wrote...

On 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday.
I noticed that it doesn't have the serial cable--is it a
regular straight-through 9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A,
no serial cable and for the love of peet, i cannot find the
cable connection diagram, and standard RS232 didn't work
either, could you help out and show me how to do it please?

Another question of interest, what's the next, more modern
version of this instrument, one could look for on eBay?

I think the 89441A was the last one with a baseband input.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[Phil Hobbs]

On 6/23/19 6:30 AM, arjen@personalrecharge.com wrote:

On Saturday, 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed
that it doesn't have the serial cable--is it a regular straight-through
9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A, no serial cable and for the love of peet, i cannot find the cable connection diagram, and standard RS232 didnt work either, could you help out and show me how to do it please?

Thanks!

Arjen.

It's a straight-through D-25 cable.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[Castorp]

On Sunday, 23 June 2019 12:30:58 UTC+2, ar...@personalrecharge.com wrote:

On Saturday, 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed
that it doesn't have the serial cable--is it a regular straight-through
9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A, no serial cable and for the love of peet, i cannot find the cable connection diagram, and standard RS232 didnt work either, could you help out and show me how to do it please?

Thanks!

Arjen.

I made my own cable and it works. It's just a 1:1 connection with DB-9 on both sides, without any crossing of the TX and RX lines. I can double-check tomorrow but I'm almost sure there's nothing else.

Cheers,
Nikolai

 

[Winfield Hill]

Phil Hobbs wrote...

Winfield Hill wrote:

Another question of interest, what's the next, more modern
version of this instrument, one could look for on eBay?

I think the 89441A was the last one with a baseband input.

What's its floppy drive? A weird HP LIF format?
Can you get the "Standard data format utilities"?


--
Thanks,
- Win

 

>What's its floppy drive?  A weird HP LIF format?

No, it's a DOS DS/DD 1.44 MB unit. You can make decent-looking TIFF plots easily, but (unlike e.g. my TDS 784As) you can't get the measurement data in a plain text file.

Cheers

Phil Hobbs

 

On Sunday, 23 June 2019 20:00:19 UTC+7, Castorp wrote:

On Sunday, 23 June 2019 12:30:58 UTC+2, ar...@personalrecharge.com wrote:
On Saturday, 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed
that it doesn't have the serial cable--is it a regular straight-through
9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A, no serial cable and for the love of peet, i cannot find the cable connection diagram, and standard RS232 didnt work either, could you help out and show me how to do it please?

Thanks!

Arjen.

I made my own cable and it works. It's just a 1:1 connection with DB-9 on both sides, without any crossing of the TX and RX lines. I can double-check tomorrow but I'm almost sure there's nothing else.

Cheers,
Nikolai

Hi Nikolai, thanks for your reply! i have tried to wire it true straight, but that did not work, i just connected pin 1 to pin 1, pin 2 to pin 2, ETC. i stopped getting the error at start-up when i omitted pins 1-6-9, but then when i want to measure something requiring the RF section, it gives a communication error. having said that, it seems that the shielding requirements and cable quality requirements could be high, im using two rather Chinese DB9's and un shielded cable

any advice is most welcome!

Thanks so far,

Arjen.

 

[Gerhard Hoffmann]

Am 23.06.19 um 12:30 schrieb arjen@personalrecharge.com:

On Saturday, 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed
that it doesn't have the serial cable--is it a regular straight-through
9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A, no serial cable and for the love of peet, i cannot find the cable connection diagram, and standard RS232 didnt work either, could you help out and show me how to do it please?

Thanks!

Arjen.

I'm currently in southern France, so i cannot check anything.

I use it over LAN only. If the 441A has the network option,
you just open port 50?? on 192.168.178.111 or whatever and then
you can read and write GPIB commands/data from/to it. The network is
old style Ethernet on BNC, so you need a converter box. I had
to terminate both ends of the RG58 cable, even if the cable was only
10 cm long.

I have written a program that runs on Linux, maybe others.
It controls the 441A and does sweeps over seven decades &
creates gnuplot output with dB / log-f axes. That involves
at least 7 different sweeps and it sorts the data together.

This is open source.

cheers, Gerhard

 

On Tuesday, 25 June 2019 05:17:50 UTC+7, Gerhard Hoffmann wrote:

Am 23.06.19 um 12:30 schrieb arjen@personalrecharge.com:
On Saturday, 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed
that it doesn't have the serial cable--is it a regular straight-through
9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A, no serial cable and for the love of peet, i cannot find the cable connection diagram, and standard RS232 didnt work either, could you help out and show me how to do it please?

Thanks!

Arjen.


I'm currently in southern France, so i cannot check anything.

I use it over LAN only. If the 441A has the network option,
you just open port 50?? on 192.168.178.111 or whatever and then
you can read and write GPIB commands/data from/to it. The network is
old style Ethernet on BNC, so you need a converter box. I had
to terminate both ends of the RG58 cable, even if the cable was only
10 cm long.

I have written a program that runs on Linux, maybe others.
It controls the 441A and does sweeps over seven decades &
creates gnuplot output with dB / log-f axes. That involves
at least 7 different sweeps and it sorts the data together.

This is open source.

cheers, Gerhard

Sounds cool Gerhard! just to make things clear, the serial cable i need to make is for the serial 2 port that connects the RF unit to the main unit.. if anyone can let me know how that is wired, then i'd be very happy. i can then use the device up to 2.8GHZ. i was really lucky with this buy, the machine i bought is literally brand new.... not a spec of dust inside, no yellowing, perfect.... i will learn allot with this setup!

 

[Castorp]

On Tuesday, 25 June 2019 04:43:35 UTC+2, ar...@personalrecharge.com wrote:

On Tuesday, 25 June 2019 05:17:50 UTC+7, Gerhard Hoffmann wrote:
Am 23.06.19 um 12:30 schrieb arjen@personalrecharge.com:
On Saturday, 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed
that it doesn't have the serial cable--is it a regular straight-through
9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A, no serial cable and for the love of peet, i cannot find the cable connection diagram, and standard RS232 didnt work either, could you help out and show me how to do it please?

Thanks!

Arjen.


I'm currently in southern France, so i cannot check anything.

I use it over LAN only. If the 441A has the network option,
you just open port 50?? on 192.168.178.111 or whatever and then
you can read and write GPIB commands/data from/to it. The network is
old style Ethernet on BNC, so you need a converter box. I had
to terminate both ends of the RG58 cable, even if the cable was only
10 cm long.

I have written a program that runs on Linux, maybe others.
It controls the 441A and does sweeps over seven decades &
creates gnuplot output with dB / log-f axes. That involves
at least 7 different sweeps and it sorts the data together.

This is open source.

cheers, Gerhard

Sounds cool Gerhard! just to make things clear, the serial cable i need to make is for the serial 2 port that connects the RF unit to the main unit. if anyone can let me know how that is wired, then i'd be very happy. i can then use the device up to 2.8GHZ. i was really lucky with this buy, the machine i bought is literally brand new.... not a spec of dust inside, no yellowing, perfect.... i will learn allot with this setup!

Sorry about the delay, I was suffering from jet lag yesterday (-:

I assumed we were talking about the same thing - the interconnection between the RF and the baseband units.

Here's what I'm using:
https://photos.app.goo.gl/FdixNHhrkBmujr656

The cable itself is short, about 1 m. It's just unshielded ribbon cable. On one side it's crimped, on the other one it's soldered. Nothing special at all, and it works.

Cheers,
Nikolai

 

On Tuesday, 25 June 2019 12:50:27 UTC+7, Castorp wrote:

On Tuesday, 25 June 2019 04:43:35 UTC+2, ar...@personalrecharge.com wrote:
On Tuesday, 25 June 2019 05:17:50 UTC+7, Gerhard Hoffmann wrote:
Am 23.06.19 um 12:30 schrieb arjen@personalrecharge.com:
On Saturday, 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed
that it doesn't have the serial cable--is it a regular straight-through
9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A, no serial cable and for the love of peet, i cannot find the cable connection diagram, and standard RS232 didnt work either, could you help out and show me how to do it please?

Thanks!

Arjen.


I'm currently in southern France, so i cannot check anything.

I use it over LAN only. If the 441A has the network option,
you just open port 50?? on 192.168.178.111 or whatever and then
you can read and write GPIB commands/data from/to it. The network is
old style Ethernet on BNC, so you need a converter box. I had
to terminate both ends of the RG58 cable, even if the cable was only
10 cm long.

I have written a program that runs on Linux, maybe others.
It controls the 441A and does sweeps over seven decades &
creates gnuplot output with dB / log-f axes. That involves
at least 7 different sweeps and it sorts the data together.

This is open source.

cheers, Gerhard

Sounds cool Gerhard! just to make things clear, the serial cable i need to make is for the serial 2 port that connects the RF unit to the main unit. if anyone can let me know how that is wired, then i'd be very happy. i can then use the device up to 2.8GHZ. i was really lucky with this buy, the machine i bought is literally brand new.... not a spec of dust inside, no yellowing, perfect.... i will learn allot with this setup!

Sorry about the delay, I was suffering from jet lag yesterday (-:

I assumed we were talking about the same thing - the interconnection between the RF and the baseband units.

Here's what I'm using:
https://photos.app.goo.gl/FdixNHhrkBmujr656

The cable itself is short, about 1 m. It's just unshielded ribbon cable. On one side it's crimped, on the other one it's soldered. Nothing special at all, and it works.

Cheers,
Nikolai

Thank you Nicolai, oddly enough, i cannot connect with the RF unit, despite the cable beeing the same as yours. only difference is that i may have reversed it as well, after testing 1 on 1 2 on 2, etc. no results.

the sub-d connectors are quite poor in quality, it may play a role, but im supprised as to why it doesnt work. just to be sure, can you see if its pin 1 on 1, etc? as i cannot see the whole cable on your image.

 

[Castorp]

On Tuesday, 25 June 2019 09:46:03 UTC+2, ar...@personalrecharge.com wrote:

On Tuesday, 25 June 2019 12:50:27 UTC+7, Castorp wrote:
On Tuesday, 25 June 2019 04:43:35 UTC+2, ar...@personalrecharge.com wrote:
On Tuesday, 25 June 2019 05:17:50 UTC+7, Gerhard Hoffmann wrote:
Am 23.06.19 um 12:30 schrieb arjen@personalrecharge.com:
On Saturday, 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday. I noticed
that it doesn't have the serial cable--is it a regular straight-through
9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A, no serial cable and for the love of peet, i cannot find the cable connection diagram, and standard RS232 didnt work either, could you help out and show me how to do it please?

Thanks!

Arjen.


I'm currently in southern France, so i cannot check anything.

I use it over LAN only. If the 441A has the network option,
you just open port 50?? on 192.168.178.111 or whatever and then
you can read and write GPIB commands/data from/to it. The network is
old style Ethernet on BNC, so you need a converter box. I had
to terminate both ends of the RG58 cable, even if the cable was only
10 cm long.

I have written a program that runs on Linux, maybe others.
It controls the 441A and does sweeps over seven decades &
creates gnuplot output with dB / log-f axes. That involves
at least 7 different sweeps and it sorts the data together.

This is open source.

cheers, Gerhard

Sounds cool Gerhard! just to make things clear, the serial cable i need to make is for the serial 2 port that connects the RF unit to the main unit. if anyone can let me know how that is wired, then i'd be very happy.. i can then use the device up to 2.8GHZ. i was really lucky with this buy, the machine i bought is literally brand new.... not a spec of dust inside, no yellowing, perfect.... i will learn allot with this setup!

Sorry about the delay, I was suffering from jet lag yesterday (-:

I assumed we were talking about the same thing - the interconnection between the RF and the baseband units.

Here's what I'm using:
https://photos.app.goo.gl/FdixNHhrkBmujr656

The cable itself is short, about 1 m. It's just unshielded ribbon cable.. On one side it's crimped, on the other one it's soldered. Nothing special at all, and it works.

Cheers,
Nikolai


Thank you Nicolai, oddly enough, i cannot connect with the RF unit, despite the cable beeing the same as yours. only difference is that i may have reversed it as well, after testing 1 on 1 2 on 2, etc. no results.

the sub-d connectors are quite poor in quality, it may play a role, but im supprised as to why it doesnt work. just to be sure, can you see if its pin 1 on 1, etc? as i cannot see the whole cable on your image.

I just checked it with a multimeter. It's 1 to 1, 2 to 2... 9 to 9.

I guess you're using the correct port (Serial 2). So I don't know what could be wrong.

Cheers,
Nikolai

 

[Phil Hobbs]

On 6/23/19 9:14 AM, Phil Hobbs wrote:

On 6/23/19 7:14 AM, Winfield Hill wrote:
arjen@personalrecharge.com wrote...

On 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday.
I noticed that it doesn't have the serial cable--is it a
regular straight-through 9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A,
no serial cable and for the love of peet, i cannot find the
cable connection diagram, and standard RS232 didn't work
either, could you help out and show me how to do it please?

  Another question of interest, what's the next, more modern
  version of this instrument, one could look for on eBay?



I think the 89441A was the last one with a baseband input.

The E4406 option B7C gives you a baseband input. They're pretty
affordable too.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[Gerhard Hoffmann]

Am 25.06.19 um 11:41 schrieb Castorp:

On Tuesday, 25 June 2019 09:46:03 UTC+2, ar...@personalrecharge.com wrote:

the sub-d connectors are quite poor in quality, it may play a role, but im supprised as to why it doesnt work. just to be sure, can you see if its pin 1 on 1, etc? as i cannot see the whole cable on your image.

I just checked it with a multimeter. It's 1 to 1, 2 to 2... 9 to 9.

I guess you're using the correct port (Serial 2). So I don't know what could be wrong.

maybe one of the plugs is in the inverted direction?
It would look 1:1 but it isn't. check the pin NUMBERS.
Gerhard

 

On Wednesday, 26 June 2019 03:44:34 UTC+7, Gerhard Hoffmann wrote:

Am 25.06.19 um 11:41 schrieb Castorp:
On Tuesday, 25 June 2019 09:46:03 UTC+2, ar...@personalrecharge.com wrote:

the sub-d connectors are quite poor in quality, it may play a role, but im supprised as to why it doesnt work. just to be sure, can you see if its pin 1 on 1, etc? as i cannot see the whole cable on your image.

I just checked it with a multimeter. It's 1 to 1, 2 to 2... 9 to 9.

I guess you're using the correct port (Serial 2). So I don't know what could be wrong.

maybe one of the plugs is in the inverted direction?
It would look 1:1 but it isn't. check the pin NUMBERS.
Gerhard

I'Ve tried it both ways, straight and reversed, both with similar results, odd thing beeing if i connect the cable straight, pin number to pin number and omit pin 1-6-9, i dont get the fault at start up, but i get the fault as soon as the controller unit attempts to communicate with the RF unit. ive seen a serial test protocol in the service manual, i guess that's the next stop, and some nice AMP sub-D connectors would be good also.

Gotta say, you guys have a nice online community here, everyone's very helpful, Thank you all! i really appreciate that!

 

[Jan Panteltje]

On a sunny day (Tue, 25 Jun 2019 18:45:09 -0700 (PDT)) it happened
arjen@personalrecharge.com wrote in
<c9b0fc07-7bc5-448f-8a88-9f8a8ec4770b@googlegroups.com>:

On Wednesday, 26 June 2019 03:44:34 UTC+7, Gerhard Hoffmann wrote:
Am 25.06.19 um 11:41 schrieb Castorp:
On Tuesday, 25 June 2019 09:46:03 UTC+2, ar...@personalrecharge.com wrote:


the sub-d connectors are quite poor in quality, it may play a role, but
im supprised as to why it doesnt work. just to be sure, can you see if
its pin 1 on 1, etc? as i cannot see the whole cable on your image.

I just checked it with a multimeter. It's 1 to 1, 2 to 2... 9 to 9.

I guess you're using the correct port (Serial 2). So I don't know what could
be wrong.

maybe one of the plugs is in the inverted direction?
It would look 1:1 but it isn't. check the pin NUMBERS.
Gerhard

I'Ve tried it both ways, straight and reversed, both with similar results,
odd thing beeing if i connect the cable straight, pin number to pin number
and omit pin 1-6-9, i dont get the fault at start up, but i get the fault
as soon as the controller unit attempts to communicate with the RF unit.
ive seen a serial test protocol in the service manual, i guess that's the
next stop, and some nice AMP sub-D connectors would be good also.

Gotta say, you guys have a nice online community here, everyone's very helpful,
Thank you all! i really appreciate that!

To see what the situation is, use a voltmeter on pin 2 and 3 of the things,
the Tx pin should be negative several volts,
and the Rx pin should be around zero volts.
Meaure it on both sides, then you know what Rx and Tx is,
and cross connect those:
Rx to TX on the other sde, and Tx or Rx on the other side.
All other ways are guesswork.

Check baudrate and parity settings.

 

[Castorp]

On Wednesday, 26 June 2019 07:13:43 UTC+2, Jan Panteltje wrote:

On a sunny day (Tue, 25 Jun 2019 18:45:09 -0700 (PDT)) it happened
arjen@personalrecharge.com wrote in
c9b0fc07-7bc5-448f-8a88-9f8a8ec4770b@googlegroups.com>:

On Wednesday, 26 June 2019 03:44:34 UTC+7, Gerhard Hoffmann wrote:
Am 25.06.19 um 11:41 schrieb Castorp:
On Tuesday, 25 June 2019 09:46:03 UTC+2, ar...@personalrecharge.com wrote:


the sub-d connectors are quite poor in quality, it may play a role, but
im supprised as to why it doesnt work. just to be sure, can you see if
its pin 1 on 1, etc? as i cannot see the whole cable on your image.

I just checked it with a multimeter. It's 1 to 1, 2 to 2... 9 to 9.

I guess you're using the correct port (Serial 2). So I don't know what could
be wrong.

maybe one of the plugs is in the inverted direction?
It would look 1:1 but it isn't. check the pin NUMBERS.
Gerhard

I'Ve tried it both ways, straight and reversed, both with similar results,
odd thing beeing if i connect the cable straight, pin number to pin number
and omit pin 1-6-9, i dont get the fault at start up, but i get the fault
as soon as the controller unit attempts to communicate with the RF unit.
ive seen a serial test protocol in the service manual, i guess that's the
next stop, and some nice AMP sub-D connectors would be good also.

Gotta say, you guys have a nice online community here, everyone's very helpful,
Thank you all! i really appreciate that!


To see what the situation is, use a voltmeter on pin 2 and 3 of the things,
the Tx pin should be negative several volts,
and the Rx pin should be around zero volts.
Meaure it on both sides, then you know what Rx and Tx is,
and cross connect those:
Rx to TX on the other sde, and Tx or Rx on the other side.
All other ways are guesswork.

Check baudrate and parity settings.

I don't think you have any control over the settings and baud rate.

About the pin numbering - I checked that too. They match.

 

[Jan Panteltje]

On a sunny day (Wed, 26 Jun 2019 00:00:48 -0700 (PDT)) it happened Castorp
<nikolaibeev@gmail.com> wrote in
<d44bba7e-bf77-4edc-bacd-fb3c58f47dc2@googlegroups.com>:

On Wednesday, 26 June 2019 07:13:43 UTC+2, Jan Panteltje wrote:
On a sunny day (Tue, 25 Jun 2019 18:45:09 -0700 (PDT)) it happened
arjen@personalrecharge.com wrote in
c9b0fc07-7bc5-448f-8a88-9f8a8ec4770b@googlegroups.com>:

On Wednesday, 26 June 2019 03:44:34 UTC+7, Gerhard Hoffmann wrote:
Am 25.06.19 um 11:41 schrieb Castorp:
On Tuesday, 25 June 2019 09:46:03 UTC+2, ar...@personalrecharge.com wrote:


the sub-d connectors are quite poor in quality, it may play a role, but
im supprised as to why it doesnt work. just to be sure, can you see if
its pin 1 on 1, etc? as i cannot see the whole cable on your image.

I just checked it with a multimeter. It's 1 to 1, 2 to 2... 9 to 9.

I guess you're using the correct port (Serial 2). So I don't know what could
be wrong.

maybe one of the plugs is in the inverted direction?
It would look 1:1 but it isn't. check the pin NUMBERS.
Gerhard

I'Ve tried it both ways, straight and reversed, both with similar results,
odd thing beeing if i connect the cable straight, pin number to pin number
and omit pin 1-6-9, i dont get the fault at start up, but i get the fault
as soon as the controller unit attempts to communicate with the RF unit.
ive seen a serial test protocol in the service manual, i guess that's the
next stop, and some nice AMP sub-D connectors would be good also.

Gotta say, you guys have a nice online community here, everyone's very helpful,
Thank you all! i really appreciate that!


To see what the situation is, use a voltmeter on pin 2 and 3 of the things,
the Tx pin should be negative several volts,
and the Rx pin should be around zero volts.
Meaure it on both sides, then you know what Rx and Tx is,
and cross connect those:
Rx to TX on the other sde, and Tx or Rx on the other side.
All other ways are guesswork.

Check baudrate and parity settings.

I don't think you have any control over the settings and baud rate.

About the pin numbering - I checked that too. They match.

The same goes for the hardware handshake lines,
it is not often used these days I think, but it is posssible older equipment uses DTR (data terminal ready, output) on pin 4
and DSR (data set ready, input) on pin 6,
same for
RTS (request to send, output) on pin 7,
and CTS (clear to send, input) on pin 8.

And there is also
DCD (data carrier detect, input) on pin 1.

So you cannot connect the cable 1 to 1.

RTS (out) should go to CTS (in),
and CTS (in) to RTS (out).

And DTR (out) shoudl go to DSR (in),
and DSR (in) to DTR(out)

Or this (with 2 and 3 swapped):
https://en.wikipedia.org/wiki/Null_modem#/media/File9_Null_Modem_Wiring.png
https://en.wikipedia.org/wiki/Null_modem

So you can loop back too, ig no handshake is needed by connecting CTS to RTS on the same connector, and DTR to DSR, etc.

Hopefully this does not create more confusion ;-)

It is simple actually.

 

[JM]

On 25/06/2019 12:02, Phil Hobbs wrote:

On 6/23/19 9:14 AM, Phil Hobbs wrote:
On 6/23/19 7:14 AM, Winfield Hill wrote:
arjen@personalrecharge.com wrote...

On 24 February 2018 03:21:07 UTC+7, Gerhard Hoffmann wrote:
Am 23.02.2018 um 20:15 schrieb Phil Hobbs:

So my new-to-me HP 89441A analyzer is due to be here Tuesday.
I noticed that it doesn't have the serial cable--is it a
regular straight-through 9-pin cable, or something weird?

I also had to make the cable myself.
It wasn't much work, and it is known how to do it.

Hi Gerhard, i have also bought one of these units, 89441A,
no serial cable and for the love of peet, i cannot find the
cable connection diagram, and standard RS232 didn't work
either, could you help out and show me how to do it please?

Another question of interest, what's the next, more modern
version of this instrument, one could look for on eBay?



I think the 89441A was the last one with a baseband input.


The E4406 option B7C gives you a baseband input. They're pretty
affordable too.

Cheers

Phil Hobbs

Just make sure you buy one with the 14 bit IF card...

 

>Just make sure you buy one with the 14 bit IF card...

Care to elaborate?

Cheers

Phil Hobbs

 

[legg]

On Wed, 26 Jun 2019 08:09:53 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

On a sunny day (Wed, 26 Jun 2019 00:00:48 -0700 (PDT)) it happened Castorp
nikolaibeev@gmail.com> wrote in
d44bba7e-bf77-4edc-bacd-fb3c58f47dc2@googlegroups.com>:

On Wednesday, 26 June 2019 07:13:43 UTC+2, Jan Panteltje wrote:
On a sunny day (Tue, 25 Jun 2019 18:45:09 -0700 (PDT)) it happened
arjen@personalrecharge.com wrote in
c9b0fc07-7bc5-448f-8a88-9f8a8ec4770b@googlegroups.com>:

On Wednesday, 26 June 2019 03:44:34 UTC+7, Gerhard Hoffmann wrote:
Am 25.06.19 um 11:41 schrieb Castorp:
On Tuesday, 25 June 2019 09:46:03 UTC+2, ar...@personalrecharge.com wrote:


the sub-d connectors are quite poor in quality, it may play a role, but
im supprised as to why it doesnt work. just to be sure, can you see if
its pin 1 on 1, etc? as i cannot see the whole cable on your image.

I just checked it with a multimeter. It's 1 to 1, 2 to 2... 9 to 9.

I guess you're using the correct port (Serial 2). So I don't know what could
be wrong.

maybe one of the plugs is in the inverted direction?
It would look 1:1 but it isn't. check the pin NUMBERS.
Gerhard

I'Ve tried it both ways, straight and reversed, both with similar results,
odd thing beeing if i connect the cable straight, pin number to pin number
and omit pin 1-6-9, i dont get the fault at start up, but i get the fault
as soon as the controller unit attempts to communicate with the RF unit.
ive seen a serial test protocol in the service manual, i guess that's the
next stop, and some nice AMP sub-D connectors would be good also.

Gotta say, you guys have a nice online community here, everyone's very helpful,
Thank you all! i really appreciate that!


To see what the situation is, use a voltmeter on pin 2 and 3 of the things,
the Tx pin should be negative several volts,
and the Rx pin should be around zero volts.
Meaure it on both sides, then you know what Rx and Tx is,
and cross connect those:
Rx to TX on the other sde, and Tx or Rx on the other side.
All other ways are guesswork.

Check baudrate and parity settings.

I don't think you have any control over the settings and baud rate.

About the pin numbering - I checked that too. They match.

The same goes for the hardware handshake lines,
it is not often used these days I think, but it is posssible older equipment uses DTR (data terminal ready, output) on pin 4
and DSR (data set ready, input) on pin 6,
same for
RTS (request to send, output) on pin 7,
and CTS (clear to send, input) on pin 8.

And there is also
DCD (data carrier detect, input) on pin 1.

So you cannot connect the cable 1 to 1.

RTS (out) should go to CTS (in),
and CTS (in) to RTS (out).

And DTR (out) shoudl go to DSR (in),
and DSR (in) to DTR(out)

Or this (with 2 and 3 swapped):
https://en.wikipedia.org/wiki/Null_modem#/media/File9_Null_Modem_Wiring.png
https://en.wikipedia.org/wiki/Null_modem

So you can loop back too, ig no handshake is needed by connecting CTS to RTS on the same connector, and DTR to DSR, etc.

Hopefully this does not create more confusion ;-)

It is simple actually.

If HP could complicate things, it did.

Possibly company policy to ensure customers captivity.

RL