Hi Samuel:
The 2x5 pin connector pin out is not at all clear.
Your Channel 3 photo seems to show:
# Chan 3
----------------
1 DCOM
2 CH3 Out
3
4
5
6 +12 in
7
8 DCOM
9
10 Fun gnd
Your 12.4 Ghz photo has the ribbon cable covering the PCB at the connector so
can not be used for pinout info.
But the manuals show:
# 12.4 G Chan 3 Main Board
pin# NG pin# NG Pin# OK
------------------------------------------
1 DC com PreSsl Out DCOM
2 DC com DC com CH3 in
3 +12 in +12 in DCOM
4 64/65 in A com CH3_DET_EN out
5 Fun Gnd Fun Gnd SW+12V
6 PreSsl Out n.c. SW+12V
7 Opt +5 Opt +5 SW+5V
8 +12 in +12 in SW-12V
9 Fun Opn Fun gnd CH3CODE1
10 Fun gnd Fun gnd CH3CODE0
The manual pin out info for Chan 3 and 12.4 GHz seems bogus. Probably is OK if
the connector pin numbering is changed. But haven't figured out the key to
that. The photo matches the main board pin out.
nx2 IDC connectors are numbered:
1 3 5 7 9
2 4 6 8 1
0
but the cable is numbered (band)1 2 3 4 5 6 7 8 9 10
IC packages are numbered:
1
0 9 8 7 6
1 2 3 4 5
Have Fun,
Brooke Clarke
http://www.prc68.com
Samuel D. [x86/CPC] wrote:
>> If you download the 53132A component level information manual from the
>> Agilent site you'll find a schematic of the channel 3 board with values
> and J2
>> pinout. The 53131A version of this manual doesn't seem to include this.
>
> Excellent ! I only checked the 53131A datasheet without success.
>
> I'm checking the schematics...
>
>
>
>
> -----Message d'origine-----
> De : [email protected] [mailto:[email protected]] De la
> part de [email protected]
> Envoyé : dimanche 15 février 2009 18:42
> À : [email protected]
> Objet : Re: [time-nuts] DIY Frequency extension for HP Agilent 53181A,
> 53131A or 53181A
>
>
> In a message dated 15/02/2009 17:05:21 GMT Standard Time, [email protected]
> writes:
>
> - What's the divider ratio used ? Perhaps /16 for 3 GHz, /32 for 5 GHz, and
> /64 for 12.4 GHz, but we really need to be sure.
> - What's the gain of each one of the four amplifiers present ?
> - How does the counter aware about the option used ? There is no
> "intelligence" on the option board, so, the counter may detect the type of
> prescaler with some pull-up or pull-down resistors somewhere.
> - What is the exact pinout for the J2 connector ?
>
> In order to get an answer, we need to find somebody with a genuine option
> board willing to spend an hour for the project...
>
>
>
> -------------------
> If you download the 53132A component level information manual from the
> Agilent site you'll find a schematic of the channel 3 board with values and
> J2
> pinout.
> The 53131A version of this manual doesn't seem to include this.
>
> regards
>
> Nigel
> GM8PZR
> _______________________________________________
> time-nuts mailing list -- [email protected]
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
> _______________________________________________
> time-nuts mailing list -- [email protected]
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
