Re: RF Voltmeter HP 3406A
--- In hp_agilent_equipment@..., David Hopkins <davhop@b...> wrote: Gentlemen, Hi David, mostly the Sampling Gate Diodes fail, and in very seldom cases the following Fet, but normally the diodes protects the Fet due to "fuse acting" before the Fet blows out. You can substitute the Sampler Diodes with HP5082-2815 matched quad shottky diodes. Self matching from fast shottkys is difficult but possible, but they are matchet not only in forewardvoltage, as i remember right also in capacitance as this affects the bridge balance, too. The original Diodes have a Special HP-Number which is never found again in any other document :-(, but the (now obselete, but here and there still available, if in doubt, ask,i have some,) -2815 Quad works well. The HP 8405 Vector Voltmeter has the same Sampling Bridge and there it also works well. I have never understood why the probes are not field repairable-... Hope that helps, Jorgen dj0ud
I have a HP 3406A Broadband Sampling Voltmeter I am repairing.
According to the test procedure in the manual , the probe assembly is
faulty and should be replaced as it is not field repairable.
I doubt if these are available from HP and if they were one could not
afford the price they would ask.
Does anyone have any experience with fixing these probes?
Failing this is there anyplace a replacement can be found.
Thanks
David
David Hopkins (VK4ZF)
Queensland
AUSTRALIA
davhop@b...
S 27, 22.294 E153, 11.008
|
John ¨C
?
Thanks for the solid info. This does
indeed give me motivation to find out what is going on. I have not tried a
different cable (I used the same cable for all measurements), so, I will try
and do that. Thanks again for? letting me know that it will really do 50 dB. 73
- Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
?
?
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-----Original Message-----
From: John Miles
[mailto:jmiles@...]
Sent: Wednesday, September 15,
2004 11:44 PM
To: hp_agilent_equipment@...
Subject: RE:
[hp_agilent_equipment] HP 436A
?
Just as a data point, I
checked my 436A with 8482A sensor ()
and found that it tracked my 8640B accurately between -30 and +20 dBm (to
within a tenth of a dB or so... I didn't pay attention to the exact deviation).
It does take the reading
a while (5-10 seconds) to settle down at the -30 dBm end of the range.
So yes, at least some of
the 436As are capable of 50 dB of measurement range.? Are you using the
same HP 11730A cable on all of the combinations you're testing?? If so,
maybe it has an open?compensation lead or something.
Something else to watch
for with the 436A is?the Sensor Zero adjustment.? After you press the
button, you want to make sure you don't apply RF power until the 'ZERO' LED
goes out.? It may take a few seconds.
-----Original
Message-----
From: Mike Feher
[mailto:n4fs@...]
Sent: Tuesday, September 14, 2004
3:13 PM
To:
hp_agilent_equipment@...
Subject: RE:
[hp_agilent_equipment] HP 436A
Dan ¨C
?
Thanks again. Before I
say anything else I will try the alignment. It just seems odd that all three of
my 436As behave the same way, with all 7 of my sensors, regardless if they are
in the high end or the low end In other words I can only get 30 dB out of an
8481A just like I can only get 30 dB out of an 8484A.. Either way, I only get
30 dB and not 50. I needed another project. Thanks - Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
|
Just
as a data point, I checked my 436A with 8482A sensor ()
and found that it tracked my 8640B accurately between -30 and +20 dBm (to within
a tenth of a dB or so... I didn't pay attention to the exact
deviation).
?
It
does take the reading a while (5-10 seconds) to settle down at the -30 dBm end
of the range.
?
So
yes, at least some of the 436As are capable of 50 dB of measurement range.?
Are you using the same HP 11730A cable on all of the combinations you're
testing?? If so, maybe it has an open?compensation lead or
something.
?
Something else to watch for with the 436A is?the Sensor Zero
adjustment.? After you press the button, you want to make sure you don't
apply RF power until the 'ZERO' LED goes out.? It may take a few
seconds.
?
--
john KE5FX
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Show quoted text
Dan
¨C
?
Thanks again. Before
I say anything else I will try the alignment. It just seems odd that all three
of my 436As behave the same way, with all 7 of my sensors, regardless if they
are in the high end or the low end In other words I can only get 30 dB out of
an 8481A just like I can only get 30 dB out of an 8484A.. Either way, I only
get 30 dB and not 50. I needed another project. Thanks -
Mike
?
?
Mike B. Feher,
N4FS
89 Arnold
Blvd.
|
Bezel: round available, square wanted
Hi There,
I have a spare HP cro bezel,
the older aluminium round type with 4 screw holes.
Good condition, a bit dusty, minor tarnish, inside paint good.
I'm looking for a plastic square type,
as used on the HP141 and HP180 cro.
Regards
Ray
|
Dan ¨C
?
Thanks again. Before I say anything else I
will try the alignment. It just seems odd that all three of my 436As behave the
same way, with all 7 of my sensors, regardless if they are in the high end or
the low end In other words I can only get 30 dB out of an 8481A just like I can
only get 30 dB out of an 8484A.. Either way, I only get 30 dB and not 50. I
needed another project. Thanks - Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
?
?
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Show quoted text
-----Original Message-----
From: Dan Tulloss
[mailto:dtulloss@...]
Sent: Tuesday, September 14, 2004
6:13 PM
To: hp_agilent_equipment@...
Subject: RE:
[hp_agilent_equipment] HP 436A
?
I think that your dynamic
range is dependent upon the sensor used.? So, if your sensor a 8481A it
goes from +20 to -30 then there you go.? Most sensors have the 50db
range(8482H 45db range).? The meter itself only uses a DC voltage that is
determined by the diode of the sensor used.? I will admit the when you are
at the extreme low end of?a sensor they are not that accurate or stable
for the most part from my experience.? I tend to try and stay in the
middle so I am not working at the low wnd and taking a chance on picking up any
ambient noise.? Also, the 11683A Range Calibrator only verifies the PM
from +20 to -25, that itself is only 45db.? I hope this helps, but as I
said before the alignment helps a lot on those meters.
Here is what agilent has
to say:
¡¤? Display readings
in Watts, dBm or dB relative eliminating measurement conversion
¡¤? Peaking meter for
analog adjustments
¡¤? Cal factor to
compensate each sensor for improved accuracy
¡¤? Frequency Range:
100 kHz to 110 GHz
¡¤? Power Range: -70
to +44 dBm?
¡¤? Power Accuracy:
¡À0.5%
¡¤? Power Reference:
Internal 50 MHz oscillator/Type-N output
-----Original
Message-----
From: Mike Feher
[mailto:n4fs@...]
Sent: Tuesday, September 14, 2004
2:54 PM
To:
hp_agilent_equipment@...
Subject: RE:
[hp_agilent_equipment] HP 436A
Dan ¨C
?
Thanks for the
suggestion. Do you remember if you did indeed get a full 50 dB dynamic range on
your 436As? ¨C Regards - Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
?
?
-----Original Message-----
From: Dan Tulloss
[mailto:dtulloss@...]
Sent: Tuesday, September 14, 2004
5:13 PM
To:
hp_agilent_equipment@...
Subject: RE: [hp_agilent_equipment]
HP 436A
?
Before
you go and try and repair the power meter try and do a full re-alignment on
it.? I have found that if you are not getting good readings at the low end
that re-aligning the 436A will bring it right back into specs.? The whole
alignment procedure can be done in about a half an hour or so with only a
meter, range calibrator and counter if my memory serves me correctly.?
This was the meter of choice when I was in the Marines and with years of use
and age in general they just don't hold the specs. as long as you would
think.? We had ours on a two or three year cycle and I would still pull
them every?six months and have the guys do an alignment and cal.? We
couldn't have the cal lab being the ones OOT.? Now I work commercial repair
and cal and no one wants them stickered for less than a year.? I think the
money issue is a problem that is going to screw up alot of measurements.
-----Original
Message-----
From: Mike Feher
[mailto:n4fs@...]
Sent: Tuesday, September 14, 2004
1:57 PM
To:
hp_agilent_equipment@...
Subject: RE:
[hp_agilent_equipment] HP 436A
Brooke
¨C
?
Thanks
for the info. The only problem is all three of my 436s behave the same way.
What are the chances of all 3 having the same problem? Is there any one on here
who does get a full 50 dB of dynamic range with their 436A? Did you try it
Brooke? I just want to make sure it is me. I mentioned it to another friend of
mine and he seemed to remember running into the same dilemma. 73 - Mike
?
?
Mike B.
Feher, N4FS
89
Arnold Blvd.
Howell,
NJ, 07731
732-901-9193
?
?
-----Original Message-----
From: Brooke Clarke
[mailto:brooke@...]
Sent: Tuesday, September 14, 2004
4:20 PM
To: n4fs@...;
hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP
436A
?
Hi
Mike:
I asked a friend who's probably one of the world's
experts on power
measurements and he thinks you 436 is
defective.? His reply is:
"Probably the A2 card (AC gain board,
contains true range decoder) of
the 436... might be the controller card A5 ...
sends the range data to
the A2."
Have Fun,
Brooke Clarke, N6GCE
--
w/Java
w/o Java
?
?
?
|
Mike,
?
I
think that your dynamic range is dependent upon the sensor used.? So, if
your sensor a 8481A it goes from +20 to -30 then there you go.? Most
sensors have the 50db range(8482H 45db range).? The meter itself only uses
a DC voltage that is determined by the diode of the sensor used.? I will
admit the when you are at the extreme low end of?a sensor they are not that
accurate or stable for the most part from my experience.? I tend to try and
stay in the middle so I am not working at the low wnd and taking a chance on
picking up any ambient noise.? Also, the 11683A Range Calibrator only
verifies the PM from +20 to -25, that itself is only 45db.? I hope this
helps, but as I said before the alignment helps a lot on those
meters.
?
?
Here
is what agilent has to say:
Display readings in Watts, dBm or dB relative eliminating
measurement conversion
Peaking meter for analog adjustments
Cal factor to compensate each sensor for improved accuracy
Frequency Range: 100 kHz to 110 GHz
Power Range: -70 to +44 dBm?
Power Accuracy: ¡À0.5%
Power Reference: Internal 50 MHz oscillator/Type-N output
Dan
?
toggle quoted message
Show quoted text
Dan
¨C
?
Thanks for the
suggestion. Do you remember if you did indeed get a full 50 dB dynamic range
on your 436As? ¨C Regards - Mike
?
?
Mike B. Feher,
N4FS
89 Arnold
Blvd.
Howell, NJ,
07731
732-901-9193
?
?
-----Original
Message-----
From: Dan
Tulloss [mailto:dtulloss@...]
Sent: Tuesday, September 14, 2004 5:13
PM
To: hp_agilent_equipment@...
Subject: RE: [hp_agilent_equipment] HP
436A
?
Before
you go and try and repair the power meter try and do a full re-alignment on
it.? I have found that if you are not getting good readings at the low
end that re-aligning the 436A will bring it right back into specs.? The
whole alignment procedure can be done in about a half an hour or so with only
a meter, range calibrator and counter if my memory serves me correctly.?
This was the meter of choice when I was in the Marines and with years of use
and age in general they just don't hold the specs. as long as you would
think.? We had ours on a two or three year cycle and I would still pull
them every?six months and have the guys do an alignment and cal.? We
couldn't have the cal lab being the ones OOT.? Now I work commercial
repair and cal and no one wants them stickered for less than a year.? I
think the money issue is a problem that is going to screw up alot of
measurements.
-----Original
Message-----
From: Mike
Feher [mailto:n4fs@...]
Sent: Tuesday, September 14, 2004 1:57
PM
To:
hp_agilent_equipment@...
Subject: RE: [hp_agilent_equipment] HP
436A
Brooke
¨C
?
Thanks
for the info. The only problem is all three of my 436s behave the same way.
What are the chances of all 3 having the same problem? Is there any one on
here who does get a full 50 dB of dynamic range with their 436A? Did you try
it Brooke? I just want to make sure it is me. I mentioned it to another
friend of mine and he seemed to remember running into the same dilemma. 73 -
Mike
?
?
Mike
B. Feher, N4FS
89
Arnold Blvd.
Howell, NJ,
07731
732-901-9193
?
?
-----Original
Message-----
From: Brooke
Clarke [mailto:brooke@...]
Sent: Tuesday, September 14, 2004 4:20
PM
To: n4fs@...;
hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP
436A
?
Hi
Mike:
I asked a friend who's probably one of the world's
experts on power
measurements
and he thinks you 436 is defective.? His reply
is:
"Probably the A2 card
(AC gain board, contains true range decoder) of
the 436... might be the controller card A5 ... sends the
range data to
the
A2."
Have
Fun,
Brooke Clarke,
N6GCE
--
w/Java
w/o Java
?
|
Dan ¨C
?
Thanks for the suggestion. Do you remember
if you did indeed get a full 50 dB dynamic range on your 436As? ¨C Regards
- Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
?
?
toggle quoted message
Show quoted text
-----Original Message-----
From: Dan Tulloss
[mailto:dtulloss@...]
Sent: Tuesday, September 14, 2004
5:13 PM
To: hp_agilent_equipment@...
Subject: RE:
[hp_agilent_equipment] HP 436A
?
Before you go and try and
repair the power meter try and do a full re-alignment on it.? I have found
that if you are not getting good readings at the low end that re-aligning the
436A will bring it right back into specs.? The whole alignment procedure
can be done in about a half an hour or so with only a meter, range calibrator
and counter if my memory serves me correctly.? This was the meter of
choice when I was in the Marines and with years of use and age in general they
just don't hold the specs. as long as you would think.? We had ours on a
two or three year cycle and I would still pull them every?six months and
have the guys do an alignment and cal.? We couldn't have the cal lab being
the ones OOT.? Now I work commercial repair and cal and no one wants them
stickered for less than a year.? I think the money issue is a problem that
is going to screw up alot of measurements.
-----Original
Message-----
From: Mike Feher
[mailto:n4fs@...]
Sent: Tuesday, September 14, 2004
1:57 PM
To: hp_agilent_equipment@...
Subject: RE:
[hp_agilent_equipment] HP 436A
Brooke ¨C
?
Thanks for the info. The
only problem is all three of my 436s behave the same way. What are the chances
of all 3 having the same problem? Is there any one on here who does get a full
50 dB of dynamic range with their 436A? Did you try it Brooke? I just want to
make sure it is me. I mentioned it to another friend of mine and he seemed to
remember running into the same dilemma. 73 - Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
?
?
-----Original Message-----
From: Brooke Clarke
[mailto:brooke@...]
Sent: Tuesday, September 14, 2004
4:20 PM
To: n4fs@...;
hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP
436A
?
Hi
Mike:
I asked a friend who's probably one of the world's
experts on power
measurements and he thinks you 436 is
defective.? His reply is:
"Probably the A2 card (AC gain board,
contains true range decoder) of
the 436... might be the controller card A5 ...
sends the range data to
the A2."
Have Fun,
Brooke Clarke, N6GCE
--
w/Java
w/o Java
?
|
Mike,
?
Before
you go and try and repair the power meter try and do a full re-alignment on
it.? I have found that if you are not getting good readings at the low end
that re-aligning the 436A will bring it right back into specs.? The whole
alignment procedure can be done in about a half an hour or so with only a meter,
range calibrator and counter if my memory serves me correctly.? This was
the meter of choice when I was in the Marines and with years of use and age in
general they just don't hold the specs. as long as you would think.? We had
ours on a two or three year cycle and I would still pull them every?six
months and have the guys do an alignment and cal.? We couldn't have the cal
lab being the ones OOT.? Now I work commercial repair and cal and no one
wants them stickered for less than a year.? I think the money issue is a
problem that is going to screw up alot of measurements.
toggle quoted message
Show quoted text
Brooke
¨C
?
Thanks for the info.
The only problem is all three of my 436s behave the same way. What are the
chances of all 3 having the same problem? Is there any one on here who does
get a full 50 dB of dynamic range with their 436A? Did you try it Brooke? I
just want to make sure it is me. I mentioned it to another friend of mine and
he seemed to remember running into the same dilemma. 73 - Mike
?
?
Mike B. Feher,
N4FS
89 Arnold
Blvd.
Howell, NJ,
07731
732-901-9193
?
?
-----Original
Message-----
From:
Brooke Clarke
[mailto:brooke@...]
Sent: Tuesday, September 14, 2004 4:20
PM
To: n4fs@...;
hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP
436A
?
Hi Mike:
I asked a friend who's probably one of the world's experts
on power
measurements and he
thinks you 436 is defective.? His reply is:
"Probably the A2 card (AC gain board, contains true range
decoder) of
the 436... might be
the controller card A5 ... sends the range data to
the A2."
Have Fun,
Brooke Clarke, N6GCE
--
w/Java
w/o Java
|
Brooke ¨C
?
Thanks for the info. The only problem is
all three of my 436s behave the same way. What are the chances of all 3 having
the same problem? Is there any one on here who does get a full 50 dB of dynamic
range with their 436A? Did you try it Brooke? I just want to make sure it is
me. I mentioned it to another friend of mine and he seemed to remember running
into the same dilemma. 73 - Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
?
?
toggle quoted message
Show quoted text
-----Original Message-----
From: Brooke Clarke
[mailto:brooke@...]
Sent: Tuesday, September 14, 2004
4:20 PM
To: n4fs@...; hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP
436A
?
Hi Mike:
I asked a friend who's probably one of the world's
experts on power
measurements and he thinks you 436 is
defective.? His reply is:
"Probably the A2 card (AC gain board,
contains true range decoder) of
the 436... might be the controller card A5 ...
sends the range data to
the A2."
Have Fun,
Brooke Clarke, N6GCE
--
w/Java
w/o Java
|
Hi Mike:
I asked a friend who's probably one of the world's experts on power measurements and he thinks you 436 is defective. His reply is:
"Probably the A2 card (AC gain board, contains true range decoder) of the 436... might be the controller card A5 ... sends the range data to the A2."
Have Fun,
Brooke Clarke, N6GCE
--
w/Java
w/o Java
|
Brooke ¨C
?
For example, I can take any of my sensors,
which are marked to have a 50 dB range and connect them to a signal generator. I
start out with the maximum level indicated on the sensor and all is well. I go down 10 dB
on the generator and the 436A follows, 10 more dB it still follows. Now, go 10
dB more and typically it goes under-range and no more reading. I just tried it
using an 8484A which has a stated range of -20 dBm to -70 dBm. With -20 it is
OK, -30 it is OK, -40 is OK, now I go to -50 and it just reads -4 indicating
below range. Before applying power the readout showed a -7 indicating it
properly detected the lowest range of the sensor. So, what¡¯s up? Thanks -
Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
?
?
toggle quoted message
Show quoted text
-----Original Message-----
From: Brooke Clarke
[mailto:brooke@...]
Sent: Monday, September 13, 2004
12:22 PM
To: hp_agilent_equipment@...
Subject: Re:
[hp_agilent_equipment] Digest Number 173
?
Hi Mike:
How are you making the measurement?
73,
Brooke Clarke, N6GCE
--
w/Java
w/o Java
>Date: Mon, 13 Sep 2004 11:09:08 -0400
>?? From: "Mike Feher"
>Subject: HP 436A
>
>I have a question regarding the subject power
meter. According to all of the
>information I have, including catalogs and the
manual, the instrument is
>supposed to be able to have a 50 dB dynamic
range. Regardless of what sensor
>I use, or which of my 436As I use, I can only
get a 30 dB dynamic range.
>What am I doing wrong? - Thanks - Mike
>
>
>
>
>
>Mike B. Feher, N4FS
>
>89 Arnold Blvd.
>
>Howell, NJ, 07731
>
>732-901-9193
>
|
Hi Mike:
How are you making the measurement?
73,
Brooke Clarke, N6GCE
--
w/Java
w/o Java
toggle quoted message
Show quoted text
Date: Mon, 13 Sep 2004 11:09:08 -0400
From: "Mike Feher" <n4fs@...>
Subject: HP 436A
I have a question regarding the subject power meter. According to all of the
information I have, including catalogs and the manual, the instrument is
supposed to be able to have a 50 dB dynamic range. Regardless of what sensor
I use, or which of my 436As I use, I can only get a 30 dB dynamic range.
What am I doing wrong? - Thanks - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
|
I have a question regarding the subject
power meter. According to all of the information I have, including catalogs and
the manual, the instrument is supposed to be able to have a 50 dB dynamic
range. Regardless of what sensor I use, or which of my 436As I use, I can only
get a 30 dB dynamic range. What am I doing wrong? ¨C Thanks - Mike
?
?
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-901-9193
?
?
?
|
It Is A Flood Gun (On Mine Anyhow), Perhaps A Missing Voltage Or A Socket
Jarred Loose. A Manual May Still Be Available For Free Download At The
Teknet Equipment Site. Also There Is A Lithium Cell At The Rear Of The Unit,
Don't Disconnect It On Accident Or You Will Lose Your Calibration.
Greyhawk USA
greyhawk@...
The information contained in this message may be privileged and confidential
and protected from disclosure. If the reader of this message is not the
intended recipient, or an employee or agent responsible for delivering this
message to the intended recipient, you are hereby notified that any
dissemination, distribution or copying of this communication is strictly
prohibited. If you have received this communication in error, please notify
us immediately by replying to the message and deleting it from your
computer.
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-----Original Message-----
From: jamesemeister [mailto:jamesemeister@...]
Sent: Thursday, September 09, 2004 1:57 PM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP 1980B Scope
Bought a 1980B scope on E-bay. Everything works except for the
graticule illumination. Is this integral to the CRT like the
flood gun approach used on some of HP's earlier scopes? Or is
there a bulb hidden very cleverly somewhere?
Yahoo! Groups Links
|
Bought a 1980B scope on E-bay. Everything works except for the
graticule illumination. Is this integral to the CRT like the
flood gun approach used on some of HP's earlier scopes? Or is
there a bulb hidden very cleverly somewhere?
|
How to clean the dial on 331A
Does anyone know what is safe to clean the old style
frequency dials on 331A/3330A type units? I dont want to
just try somthing and find it removes the lettering.
Thanks
BL
|
Hi Gearoid, Does anybody have a scanned Operation & Service Manual for a HP1740A
100MHz oscilloscope. People keep telling me to look in
this "logsa.army" website but I can never get in there - is there a
secret here?
Full version required.
Any help appreciated.
I don't have a scanned one, I'll make you a photocopy of mine. Regards Ray
|
Thank you
Ian Wells
Kerinvale Comaudio
mail service 1017,
Biloela,4715.
www.kerinvalecomaudio.com.au
1-email- ianwells@...
2-email- kvcomaudio@...
3-email- kvcomaud@...
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----- Original Message ----- From: "jbarnes" <jbarnes@...> To: <hp_agilent_equipment@...> Sent: Saturday, September 04, 2004 7:43 PM Subject: Re: [hp_agilent_equipment] Digest Number 167 Hi, You could try checking the DIP switch. They can go bad. You may want to replace it. Regards, John ---------- Original Message ---------------------------------- From: "VK4ACB" <vk4acb@...> Reply-To: hp_agilent_equipment@... Date: Sat, 4 Sep 2004 12:51:16 +1000 <html><body>
<tt>
Thanks George, I too have two of them ! the problem I have is that even with<BR> the dip switch on the back set the same, one of them wont allow me to set<BR> the day/month, it increments ok as the clock cycles each day over, but wont<BR> allow me to reset and adjust the day/month like I can the other clock, I run<BR> one on UTC and the other local time, frustrating!<BR>
<BR>
Wade VK4ACB<BR>
<BR>
<BR>
Subject: Re: HP 59309A HP-1B Digital Clock<BR>
<BR>
There's not much to it. I have two of them<BR>
and one had a sticker with the GPIB<BR>
commands on the bottom.<BR>
<BR>
There is only a handful of commands.<BR>
I tried to calibrate the clock against my<BR>
GPS frequency standard, but the<BR>
trimmer is kind of coarse.<BR>
<BR>
So now, I just reset the time every 24 hours<BR>
from my Linux/GPIB box.<BR>
<BR>
George N2FGX<BR>
<BR>
VK4ACB wrote:<BR>
<BR>
Can anyone help me with a copy of the operating and service manual for<BR> the<BR>
HP 59309A clock?<BR>
<BR>
Wade VK4ACB<BR>
<BR>
<BR>
</tt>
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Hi,
You could try checking the DIP switch. They can go bad. You may want to replace it.
Regards,
John
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---------- Original Message ---------------------------------- From: "VK4ACB" <vk4acb@...> Reply-To: hp_agilent_equipment@... Date: Sat, 4 Sep 2004 12:51:16 +1000 <html><body>
<tt>
Thanks George, I too have two of them ! the problem I have is that even with<BR>
the dip switch on the back set the same, one of them wont allow me to set<BR>
the day/month, it increments ok as the clock cycles each day over, but wont<BR>
allow me to reset and adjust the day/month like I can the other clock, I run<BR>
one on UTC and the other local time, frustrating!<BR>
<BR>
Wade VK4ACB<BR>
<BR>
<BR>
Subject: Re: HP 59309A HP-1B Digital Clock<BR>
<BR>
There's not much to it. I have two of them<BR>
and one had a sticker with the GPIB<BR>
commands on the bottom.<BR>
<BR>
There is only a handful of commands.<BR>
I tried to calibrate the clock against my<BR>
GPS frequency standard, but the<BR>
trimmer is kind of coarse.<BR>
<BR>
So now, I just reset the time every 24 hours<BR>
from my Linux/GPIB box.<BR>
<BR>
George N2FGX<BR>
<BR>
VK4ACB wrote:<BR>
<BR>
Can anyone help me with a copy of the operating and service manual for<BR> the<BR>
HP 59309A clock?<BR>
<BR>
Wade VK4ACB<BR>
<BR>
<BR>
</tt>
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Putting best foot forward.... HP1715A
Howdy All-
RE: HP1715A (and family) scope -- rear panel foot/bumper.
Anyone have a spare rear panel foot (more like a leg) that bolts to
the rear apron on the HP 1715A scope?
These are black resilient plastic about 2 inches tall also has power
cord retainer clips molded into the plastic.
Could use one or two...
Please advise.
Thanks!
Regards,
Bob, (aka Vollumscope)
|
