Me too.
I have two 545A's, one of which works and the other of which has issues with
Band 3, failing to read in a very interesting pattern suggesting a YIG
filter issue, probably the control circuit.
Just no time to chase it right now.
Please post the resolution.
Thanks.
Joe
I have an EIP counter with a problem, stashed, that I need to look at
eventually. So have been following the thread a bit.
If you guys get somewhere conclusive (or not), might be nice to post a
summary of all important details, techniques, or circuit notes beyond
the manual, found, to this
I have an EIP counter with a problem, stashed, that I need to look at
eventually. So have been following the thread a bit.
If you guys get somewhere conclusive (or not), might be nice to post a
summary of all important details, techniques, or circuit notes beyond
the manual, found, to
Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Rex
Sent: Monday, December 10, 2012 6:50 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] EIP545A 18GHz counter query
I have an EIP counter with a problem, stashed
of precise time and frequency measurement
Subject: Re: [time-nuts] EIP545A 18GHz counter query
I have an EIP counter with a problem, stashed, that I need to look at
eventually. So have been following the thread a bit.
If you guys get somewhere conclusive (or not), might be nice to post
: Monday, December 10, 2012 6:50 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] EIP545A 18GHz counter query
I have an EIP counter with a problem, stashed, that I need to look at
eventually. So have been following the thread a bit.
If you guys get
...@febo.com]
On Behalf Of Rex
Sent: Monday, December 10, 2012 6:50 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] EIP545A 18GHz counter query
I have an EIP counter with a problem, stashed, that I need to look at
eventually. So have been following
Yes. There is a Yahoo Group spwecifically about EIP products.
-John
I have an EIP counter with a problem, stashed, that I need to look at
eventually. So have been following the thread a bit.
If you guys get somewhere conclusive (or not), might be nice to post a
summary
Did do some more reading and I think what I suggest is the right approach.
Band 2 and 3 use the same VCO. So if band 2 is generally working
then its possibly the rf multiplier yig filter mixer diodes etc. But
if the RF detectors show RF then its going to be a much more interesting
issue.
wireless tracker.
-Original Message-
From: Chris Wilson ch...@chriswilson.tv
To: Chris Wilson ch...@chriswilson.tv, Discussion of precise time and
frequency measurement time-nuts@febo.com
Sent: Sun, 09 Dec 2012 5:54 AM
Subject: Re: [time-nuts] EIP545A 18GHz counter query
Did do some
.
-Original Message-
From: Chris Wilson ch...@chriswilson.tv
To: Chris Wilson ch...@chriswilson.tv, Discussion of precise time and
frequency measurement time-nuts@febo.com
Sent: Sun, 09 Dec 2012 5:54 AM
Subject: Re: [time-nuts] EIP545A 18GHz counter query
Did do some more reading and I think
and
frequency measurement time-nuts@febo.com
Sent: Sun, 09 Dec 2012 5:54 AM
Subject: Re: [time-nuts] EIP545A 18GHz counter query
Did do some more reading and I think what I suggest is the right
approach.
Band 2 and 3 use the same VCO. So if band 2 is generally working
then its possibly
of precise time and
frequency measurement time-nuts@febo.com
Sent: Sun, 09 Dec 2012 5:54 AM
Subject: Re: [time-nuts] EIP545A 18GHz counter query
Did do some more reading and I think what I suggest is the right
approach.
Band 2 and 3 use the same VCO. So if band 2 is generally working
SNIP__
This is where I am now, I hope the above makes some sense if
viewed with the service manual and the schematics. Thanks.
07/12/2012 10:17
Latest update:
Removed Q12 from board A109 and put a 1k resistor across vacant
Chris
So you also must run the gatesgarth website. I was thinking there might be
other good tidbits. The EIP manual was nice. Good job on the control signal.
I had a chance to reread the theory of operation yesterday (Well parts) and
if band 2 is now working by cheating at least, then it would be
Did do some more reading and I think what I suggest is the right approach.
Band 2 and 3 use the same VCO. So if band 2 is generally working then its
possibly the rf multiplier yig filter mixer diodes etc. But if the RF
detectors show RF then its going to be a much more interesting issue.
I do not
Chris wrote:
I have the 10MHz output from David's divider feeding the counter. When
fed from this the Band 2 seems unreliable starting at 10MHz. If I feed
it 10Mhz at 50mV from my sig gen it starts reliably. Is it a mismatch
from the divider, or has it perhaps not got enough drive level?
Very interested as I have one of these and its troubled but differently.
Can't really dig in right now.
Paul
WB8TSL
On Thu, Dec 6, 2012 at 7:33 AM, Chris Wilson ch...@chriswilson.tv wrote:
Chris wrote:
I have the 10MHz output from David's divider feeding the counter. When
fed from this
Chris,
Put a ohmmeter across any of the capacitors on the GPIB board and see what
the resistance is. Since that kills the unit, I suspect the resistance is
low (?shorted tantalum) or there is a problem with one of the chips that
takes the 5 VDC buss down. Make sure of the polarity of
29/11/2012 09:30
The replacement for the missing U6 chip arrived this morning and it
now completes the 200 MHz self test It will read up to the limit of my
frequency generator on Band 3 which is only 1040 MHz, but looks
promising.
Band 2 also works, but seemingly has an anomaly. I cannot get
I had the same problem with my 545A, and it turned out
to be a tin whisker thing. Scrub both the GPIB card, and
the main controller card with a brush, and then blow them
off with compressed air. Try to get the air close to each
chip and socket, and blow from all angles. Plug the cards
back in,
It sounds like a SW limit, not hardware.
Silly question: Have you read the manual?
-John
=
29/11/2012 09:30
The replacement for the missing U6 chip arrived this morning and it
now completes the 200 MHz self test It will read up to the limit of my
frequency generator on Band
It sounds like a SW limit, not hardware.
Silly question: Have you read the manual?
-John
29/11/2012 15:31
Hi John, will re read the section on limits, but please see my reply
to Chuck I just posted. Cheers.
--
Best Regards,
Chris Wilson.
29/11/2012 09:30
The replacement for the missing U6 chip arrived this morning and it
now completes the 200 MHz self test It will read up to the limit of my
frequency generator on Band 3 which is only 1040 MHz, but looks
promising.
Band 2 also works, but seemingly has an anomaly. I
Chris wrote:
I have the 10MHz output from David's divider feeding the counter. When
fed from this the Band 2 seems unreliable starting at 10MHz. If I feed
it 10Mhz at 50mV from my sig gen it starts reliably. Is it a mismatch
from the divider, or has it perhaps not got enough drive level?
: Re: [time-nuts] EIP545A 18GHz counter query
29/11/2012 09:30
The replacement for the missing U6 chip arrived this morning and it
now completes the 200 MHz self test It will read up to the limit of my
frequency generator on Band 3 which is only 1040 MHz, but looks
promising.
Band 2
OK. It maybe time for the hair dryer and freeze spray. Also, try
re-seating any socketed chips.
-John
==
It sounds like a SW limit, not hardware.
Silly question: Have you read the manual?
-John
29/11/2012 15:31
Hi John, will re read the section on limits, but please see
Chris wrote:
I have the 10MHz output from David's divider feeding the counter. When
fed from this the Band 2 seems unreliable starting at 10MHz. If I feed
it 10Mhz at 50mV from my sig gen it starts reliably. Is it a mismatch
from the divider, or has it perhaps not got enough drive level?
Chris wrote:
Band 2 should work from -20dbm (22mV RMS) right across its 10 MHz to 1
GHz range according to the manual. Even with 190 MHz into it it takes
at least 30mV to start triggering, sometimes up to 40 mV. 40 mV will
reliably fire it across its full range once it warms up a bit.
Band 1
and frequency measurement
Subject: Re: [time-nuts] EIP545A 18GHz counter query
29/11/2012 09:30
The replacement for the missing U6 chip arrived this morning and it
now completes the 200 MHz self test It will read up to the limit of my
frequency generator on Band 3 which is only 1040 MHz, but looks
27/11/2012 14:18
I bought a 18GHz EIP545A counter which the vendor said was working
fine the day before and when on overnight soak test, and also when
last used some months agao. But when he checked it on the morning of
my coming over to see it he found it had developed a fault... I bought
it
The first thing to do with any EIP counter is to remove and reseat all the
PCBs. The card sockets they use are sometimes flaky. Simply doing this
fixed most of the counters. This is especially true if they have been
storfed for a while.
YMMV,
-John
===
27/11/2012 14:18
This one is usually an easy fix. The EPROMS on the controller
card are using tin plated sockets, and they become tin-whisker
cities. The counter will usually have enough oomph to blow any
transient whiskers away if it is left running, but if it sits
the whiskers will grow quickly and prevent
/HP5004.shtml
Bob
-Original Message-
From: Chuck Harris
Sent: Tuesday, November 27, 2012 7:45 AM
To: Chris Wilson ; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] EIP545A 18GHz counter query
This one is usually an easy fix. The EPROMS on the controller
card
of precise time and frequency measurement time-nuts@febo.com
Subject: Re: [time-nuts] EIP545A 18GHz counter query
Not that it's likely to help you, but a signature analyzer uses a shift
register with feedback to generate a 4 hex character signature from a
serial data stream. It would only help
EIP was like many smaller TM companies, they by virtue of the size of
lack of the desire to research component, manufacturing, life cycle testing,
TQM, etc, etc. produced great instruments the day they were made. After
that things went down hill. BTW, the big boys would forget all the above
from
Hi Chris,
The first thing you should do is join the EIP_Microwave group at yahoo:
http://tech.groups.yahoo.com/group/EIP_Microwave
There's lots of info and help there for EIP counters.
Don't worry about the signature analyzer for now. It would normally be
used if the processor was dead.
snip
I'm in the same position as you regarding testing at high frequencies.
You might be able to get a signal at the second or third harmonic of
your generator by cranking the level to the maximum and then using the
counter's Band 3 frequency limits feature to only look at that
frequency.
Hi Don,
Yes, I've heard of SRDs. I think every Rb standard uses them. I
recently purchased a YIG Multiplier that includes an SRD followed by a
YIG filter. But, from my reading, there are some significant issues
that you run into when driving an SRD. I'm still playing with mine.
Ed
On
You can also overdrive a mmic and get good results. That is what I'm using as
the oscillator for my 1.296 GHz beacon.
Bob
On Nov 27, 2012, at 15:45, Ed Palmer ed_pal...@sasktel.net wrote:
Hi Don,
Yes, I've heard of SRDs. I think every Rb standard uses them. I recently
purchased a YIG
Hi Ed: I have one of these too; it takes in about 200 MHz, output
0.4-1.8 GHz. ten ohm coil, also a heater at 28 v. I also have a filter
that uses about the same voltage/current. I did find an LED/battery
charger module from China, pretty cheap, that purports to be pwm
adjustable; we'll see. I'll
Hi Chris,
The first thing you should do is join the EIP_Microwave group at yahoo:
http://tech.groups.yahoo.com/group/EIP_Microwave
There's lots of info and help there for EIP counters.
Don't worry about the signature analyzer for now. It would normally be
used if the processor was
Boy great thread running here. I have a number of older EIPs that all work
and have been repaired. Hard to pass up the $25ers. I also have several
newer ones 545 and 585s. EIP became a bit more clever on these in how they
process the YIG signals and thats the place I am having issues on all 3.
Its
Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chris Wilson
Sent: Tuesday, November 27, 2012 4:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] EIP545A 18GHz counter query
Hi Chris,
The first thing you should do
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