Re: [time-nuts] RS232 output on a 53181A

[Angus]

Hi,

Also, since it's a p rather than any other character, my guess is that
it probably was deliberate - although whether it was meant to be
shipped like that is another question.

Angus.


On Wed, 12 Jul 2017 11:56:24 -0400, you wrote:

>Well ASCII * is 2a in Hex, p is 70 so that seems an unlikely substitution
>for a failing EPROM.
>
>But 0 is 30 Hex, only one bit different from p.
>
>On Wed, Jul 12, 2017 at 10:39 AM, Angus  wrote:
>
>> Hi,
>>
>> I've just been using an Agilent 53181A, but the serial output is not
>> quite what I had expected. On the 53131A's that I've used the
>> placeholder character on the RS232 output is an asterisk, but with
>> this unit it is a lower case 'p'. Where the 53131A sends '2,*** u',
>> this 53181A send '2,ppp u'. The only references to a placeholder that
>> I saw in the manuals referred to an asterisk.
>>
>> The firmware version is 4613.
>>
>> Anyway, just wondering if anyone knows if this is correct, or maybe
>> it's just the EPROM starting to fail.
>>
>> Thanks,
>> Angus.
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
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>> mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
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Re: [time-nuts] RS232 output on a 53181A

[Bob kb8tq]

Hi

There may well be multiple EEROM’s in the 53181 and 5313x counters. At least 
when I have blown up the EEPROM in them, it comes back with a error. I haven’t 
blown any up since the early 1980’s so I don’t quite remember the exact error 
message involved. Had it simply failed silently, I would have never noticed the 
problem.

Bob

> On Jul 12, 2017, at 10:39 AM, Angus  wrote:
> 
> Hi,
> 
> I've just been using an Agilent 53181A, but the serial output is not
> quite what I had expected. On the 53131A's that I've used the
> placeholder character on the RS232 output is an asterisk, but with
> this unit it is a lower case 'p'. Where the 53131A sends '2,*** u',
> this 53181A send '2,ppp u'. The only references to a placeholder that
> I saw in the manuals referred to an asterisk.
> 
> The firmware version is 4613.
> 
> Anyway, just wondering if anyone knows if this is correct, or maybe
> it's just the EPROM starting to fail.
> 
> Thanks,
> Angus.
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

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Re: [time-nuts] RS232 output on a 53181A

[Jim Harman]

Well ASCII * is 2a in Hex, p is 70 so that seems an unlikely substitution
for a failing EPROM.

But 0 is 30 Hex, only one bit different from p.

On Wed, Jul 12, 2017 at 10:39 AM, Angus  wrote:

> Hi,
>
> I've just been using an Agilent 53181A, but the serial output is not
> quite what I had expected. On the 53131A's that I've used the
> placeholder character on the RS232 output is an asterisk, but with
> this unit it is a lower case 'p'. Where the 53131A sends '2,*** u',
> this 53181A send '2,ppp u'. The only references to a placeholder that
> I saw in the manuals referred to an asterisk.
>
> The firmware version is 4613.
>
> Anyway, just wondering if anyone knows if this is correct, or maybe
> it's just the EPROM starting to fail.
>
> Thanks,
> Angus.
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/
> mailman/listinfo/time-nuts
> and follow the instructions there.
>



-- 

--Jim Harman
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[time-nuts] RS232 output on a 53181A

[Angus]

Hi,

I've just been using an Agilent 53181A, but the serial output is not
quite what I had expected. On the 53131A's that I've used the
placeholder character on the RS232 output is an asterisk, but with
this unit it is a lower case 'p'. Where the 53131A sends '2,*** u',
this 53181A send '2,ppp u'. The only references to a placeholder that
I saw in the manuals referred to an asterisk.

The firmware version is 4613.

Anyway, just wondering if anyone knows if this is correct, or maybe
it's just the EPROM starting to fail.

Thanks,
Angus.
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