Bruce,
I have a 100MHz scope, DVM, frequency counter, signal generator, etc.
Sorry, no spec an. I wish I had one.
The first problem is that it fails the first performance test. Instead
of 100nS, I get about 10nS and that slowly increases to about 12nS.
This is with the unit already warmed up and
Bruce Griffiths wrote:
swingbyte wrote:
HI all ,
I had a 5370 A shipped to me that suffered enough of a drop/roll to
break a handle and bend the chassis such that the bottom panel had to
be modified to get it back on. When I connected the timebase output
to the start input the frequency
Tim,
For 0.1 second gate time, my result is similar to yours. With my gate time
set to 1 second, the racking drops to +/- 1E-10 (or less), for comparison.
Greg
- Original Message -
From: swingbyte swingb...@exemail.com.au
To: Discussion of precise time and frequency measurement
It looks like I have a bad BNC on the front panel. After inspecting
the insides, I powered it up again. I got 104nS. Wiggling the BNC, it
went back to 12nS. I tried another coax - same problem. Before I tear
the front panel off, I'll see if I can find in the manual what I have
to adjust to get it
Joe
Just be careful no to break the plastic handles off the boards.
The board retention force can be quite high.
Bruce
Joseph Gray wrote:
Bruce,
I have a 100MHz scope, DVM, frequency counter, signal generator, etc.
Sorry, no spec an. I wish I had one.
The first problem is that it fails
swingbyte wrote:
Bruce Griffiths wrote:
swingbyte wrote:
HI all ,
I had a 5370 A shipped to me that suffered enough of a drop/roll to
break a handle and bend the chassis such that the bottom panel had to
be modified to get it back on. When I connected the timebase output
to the start
In a message dated 09/10/2009 23:18:52 GMT Daylight Time, h...@to-way.com
writes:
I don't have that feature. Maybe a difference between the two
versions. How about emailing that one over to me. 1.46 found the
Res-T with out any help from me as soon as I told it what Com port it
was
Bruce,
Thanks for the tip. I was very careful. Only one board was really
stuck. I left it alone for now.
Just for the heck of it, I did a few more steps in the Chapter 4
Operation Verification. As I said, discounting the bad BNC, step 13
reads aproximately 103.6nS, so I continued.
Steps 14, 15
Oh, one last question for the night. I noticed that the CPU board has
an emply ROM socket. I assume this is normal?
OK, let's make it two questions. While I'm working on this thing,
should I pull the EPROMS and ROMS and read them? I've heard of EPROMS
going bad in some other old equipment (maybe
Oh, one last question for the night. I noticed that the CPU board has
an emply ROM socket. I assume this is normal?
OK, let's make it two questions. While I'm working on this thing,
should I pull the EPROMS and ROMS and read them? I've heard of EPROMS
going bad in some other old equipment
Oh, one last question for the night. I noticed that the CPU board has
an emply ROM socket. I assume this is normal?
Yes, and you can use it to eliminate the ROM board altogether if desired.
See the .txt and .jpg files in the directory I mentioned earlier.
-- john, KE5FX
John,
Trigger levels are set to Preset for most steps. In step 18, I
verified that Preset is 0V and the Level voltage varied from
aproximately -1.3 to +0.6 volts. The manual specifies approximately
-1.3 to +0.5 volts.
In step 15, the standard deviation was bouncing around between about
36-57pS.
I keep thinking of things instead of going to bed.
In the 5370A manual, the ops verification of the HPIB port requires an
old HP computer and a program on tape. Needless to say, I don't think
I'm going to come across either of these items. So, has anyone managed
to duplicate that test with modern
Hi Joe
I have a similar problem so I would be pleased to hear from you with any
useful information. The basic problem with mine is that the power supply is
suspect - it works, but there is excessive heat, much greater than any other
HP instrument that I have, from the rear mounted heat-sink,
Joe
You can check a lot of the functionality from the front panel.
Make sure that it works well using the front panel controls before
checking that the HPIB interface works.
To check the HPIB functionality you will need an HPIB/GPIB interface for
your PC.
It is easy to duplicate the tests done
Just a short reminder that these are still available to members of these two
lists at GBP50 per kit. If you live in the UK it would be GBP45.
Regular sales via eBay would be USD90 plus postage.
Cheers
David Partridge
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time-nuts mailing list --
A 4.35 milli-Hertz(mHz)deviation is not bad at all. If you meant 4.35
Mega-Hertz (MHz). There are a few orders of magnitude between these
(10^-3 to 10^6).
The proper use of units is important. In some cases this improper use
of units can be understood due to the wrong units cannot apply. In
David C. Partridge wrote:
Just a short reminder that these are still available to members of these two
lists at GBP50 per kit. If you live in the UK it would be GBP45.
Regular sales via eBay would be USD90 plus postage.
Could you do a quick summary of what that kit is. I can't find anything
Hej Magnus,
You can find out all about it by looking at my eBay listing for it which
also contains links to further documentation.
The eBay listing is item number 280396431889.
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of
Joe,
Here's a coarse way to use the front panel to see if any large DC bias
errors have developed in your Input Amp and/or Schmitt Trigger circuits (A3
and A4) for either or both channels. (Disclaimer: this doesn't replace the
corresponding DC bias adjustments in the manual, but it is a quick
Roy,
The HP 5370A rear mounted heat-sink typically heats up to around 61 degrees
C. This is very hot to the touch, so I suspect your unit's temperature is
normal (unless it's running way hotter than 61 degrees C).
The buzzing transformer might just be due to loose, vibrating laminations.
You
One thing to note, the 5370A has a slim line relay (K1) in the power supply
that switches all of the voltages on... it is there for the crystal oscillator.
I had one that didn't produce enough contract pressure to reliably switch on all
of the voltages, and would quit if you bumped it lightly.
Greg
Thank you - that's good news re temperature - I will check the transformer
for loose laminations. I am collecting the various information from other's
regarding calibration/ performance.
Roy
- Original Message -
From: Greg Burnett gb...@comcast.net
To: Discussion of precise time
I've been running the Windows version of Lady Heather tp make some
comparisons between Thunderbolts and Mini-Ts, she cracks her whip just as
firmly
for the Mini-T:-) and have noticed that, for both, I'm seeing all the plots
other than the frequency deviation.
If I move the mouse pointer
Greg,
I did your test and at the 12 o'clock position, both levels read
-0.32V. Zero volts is at about 1 o'clock. With the attenuator switched
in, the range on the pots is fairly sharp.
Thanks for the tip. I'll add the DC bias adjustment to my list.
Joe Gray
KA5ZEC
On Sat, Oct 10, 2009 at 8:57
I'm seeing all the plots other than the frequency deviation.
Osc plot defaults to off,
g o turns in on
Push spare bar for the help screen
ws
*
I've been running the Windows version of Lady Heather tp make some
comparisons between Thunderbolts and Mini-Ts, she cracks her whip
In a message dated 10/10/2009 20:17:36 GMT Daylight Time,
warrensjmail-...@yahoo.com writes:
I'm seeing all the plots other than the frequency deviation.
Osc plot defaults to off,
g o turns in on
Push spare bar for the help screen
---
Ah, thank you, didn't know that.
The heatsink on my unit is quite hot, also. I'm thinking about putting
a fan on it after I get everything working.
On Sat, Oct 10, 2009 at 9:24 AM, Greg Burnett gb...@comcast.net wrote:
Roy,
The HP 5370A rear mounted heat-sink typically heats up to around 61 degrees
C. This is very hot to
Joe - When you manually set the trigger level pots to the center of the
triggered range (as indicated by flashing trigger LED), does your digital
display indicate trigger levels near zero volts? That is what's important -
and what might be way off if you have DC bias problems in the front-end.
Greg,
Yes, the trigger levels are near zero when the LEDs are flashing. The
level pots are both at 1 o'clock, instead of 12 o'clock, however.
There does seem to be a problem with the preset trigger postition.
Although the display shows 0.00V when at preset, I don't think it is.
When I manually
Of course, make sure that the existing fan is running and that the top
instrument cover is installed. (The top cover must be in place so that the
internal fan air currents will loop around and pass through vents, including
the through-holes in the rear heat sink.)
I don't think it would be a
Nice part, up to 10GHz!
probably well worth the $3.50
If followed by a larger inductor/resistor, could probably be used to well
below 50MHz.
bye,
Said
In a message dated 10/9/2009 06:57:23 Pacific Daylight Time,
ijcous...@verizon.net writes:
For a broad band, surface mount biasing
Hi All: I put extended fins on my 1980's Hp equipment by drilling and
tapping the existing sink. I used the white heatsink grease from Radio
Shack to help.
Don Latham
Joseph Gray
The heatsink on my unit is quite hot, also. I'm thinking about putting
a fan on it after I get everything working.
After
g o Rtn to turn the Osc Freq plot on
Can set the plot scale factors for better readability
so that the Osc freq plot does not obscure the other plots:
m o Esc 100 Rtn Sets Osc Freq to 100 ppt/div
m p Esc 10 RtnSet Phase PPS to 10 ns/div
So now all your HP equipment looks like a 1950's parking lot, huh?
On Sat, Oct 10, 2009 at 4:16 PM, Don Latham d...@montana.com wrote:
Hi All: I put extended fins on my 1980's Hp equipment by drilling and
tapping the existing sink. I used the white heatsink grease from Radio
Shack to help.
Joe,
I think 1 o'clock (instead of 12 o'clock) might still be OK and/or typical?
Maybe some other 5370A users can tell us where their Trigger Level pots are
pointing when centered for triggering on a weak signal. (The pots point to
12 o'clock on my 5370B, but I can't remember exactly where
Greg,
I plan on doing the A3/A4 adjustments. I just don't know where I'm
going to get a pulse generator or the fancy scope with the 1GHz
sampling plugin. Not the type of equipment on your average test bench.
On Sat, Oct 10, 2009 at 5:03 PM, Greg Burnett gb...@comcast.net wrote:
Joe,
I think
oh yeah-cool :-)
Don
Joseph Gray
So now all your HP equipment looks like a 1950's parking lot, huh?
On Sat, Oct 10, 2009 at 4:16 PM, Don Latham d...@montana.com wrote:
Hi All: I put extended fins on my 1980's Hp equipment by drilling and
tapping the existing sink. I used the white heatsink
I plan on doing the A3/A4 adjustments. I just don't know where I'm
going to get a pulse generator or the fancy scope with the 1GHz
sampling plugin. Not the type of equipment on your average test bench.
You won't need any exotic gear for the DAC voltage adjustments or the A3/A4
input assembly
Hi Ray,
One here in Perth, Western Australia.
Geoff
- Original Message -
From: Ray Hudson hudson...@yahoo.com.au
To: time-nuts@febo.com
Sent: Wednesday, October 07, 2009 4:53 PM
Subject: [time-nuts] Any Time nuts in AU?
Just a test to see if I can send to the mailing list and to
Bruce Griffiths wrote:
swingbyte wrote:
Bruce Griffiths wrote:
swingbyte wrote:
HI all ,
I had a 5370 A shipped to me that suffered enough of a drop/roll to
break a handle and bend the chassis such that the bottom panel had to
be modified to get it back on. When I connected
swingbyte wrote:
Bruce Griffiths wrote:
swingbyte wrote:
Bruce Griffiths wrote:
swingbyte wrote:
HI all ,
I had a 5370 A shipped to me that suffered enough of a drop/roll to
break a handle and bend the chassis such that the bottom panel had to
be modified to get it back
On Sat, Oct 10, 2009 at 8:55 PM, swingbyte swingb...@exemail.com.au wrote:
My unit is a 2036A ser # so the first to have the 10811 as standard- still
only 29 years old!
Hey, mine is the same SN prefix as yours.
Joe Gray
KA5ZEC
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