My "new" HP 5370A shows Err 02 - Page 1
Forum section: electronics / projects

author: bingo600
author_rank: Super Contributor
timestamp: August 30, 2013, 04:41:14 pm
content: Edit: Should have been posted in theTest Instrumentforum (sorry)I got my 5370A , and it has the 10544 OCXO in it.But it's sick ....After having worked ok for approx 35 min.Just doing the verification from the manual , using the internal 10Mhz as input to Start ,i'm now getting Err 02 (Input out of range / Overrange) , and it's not ARM'ing anymore.ARM is constant lit , not blinking , but the Start/Stop leds are blinking , so the signal is detected.I was following the verification test in the manual (Warning 41MB)http://www.home.agilent.com/agilent/redirector.jspx?action=ref&cname=AGILENT_EDITORIAL&ckey=841982&lc=dan&cc=DK&nfr=-536900193.536897977.00My pages might be a bit confusing .....But the test (the steps) starts at physical page 69 (the reader) , and it's logical page 4-2 (the number printed on the scan).Code:Test pg 4-28 (69) - Table 4-3 - See Errata starting on page 4PON test pg. 4-2 Step 1-13: Disp 99.69 to 99.73 (flipping fast)Step 14: 100 - Disp 99.69x to 99.70x - 100 - Disp 99.68x to 99.69x -1000 - Disp 99.689x to 99.697x - 10K - Disp 99.7061 to 99.7084 - 100K - Disp 99.7053 to 99.7096Step 15: Disp 13.x to 17.x (flipping) - Min 99.73/75 - Max 99.80 (Err 02)If anyone has some hints , they are most welcome.Symptoms :The unit just shows 00.00 S , and after a while Err 02 is shown on the Display.Once in a while if i'm lucky it arms (several minutes of 0.00) , and shows a good value , but mostly it just shows 0.00 and then ends up in Err 02.The buttons seems to react as they should (except the slope slider for the external ARM circuit, witch seems to be stuck)But during the 35 min of working ok , that slider was in the same position , and it didnt influence the 3570A.I have been powering it off during the night , and have hoped it might work for another 35min, when cold.But no ... It just shows 0.00 S , and ends in Err 02 after a while./Bingo

author: Dr. Frank
author_rank: Super Contributor
timestamp: August 30, 2013, 11:16:34 pm
content: Well err 02 is caused by the 31bit overflow of the internal t.I. counter, takes normally about 10.7 sec, or so, if the signal is not properly triggered.It's not an system error, but only an ordinary / minor "user -error", or overflow error, or how should I call that ?Something, what frequently occurs in regular use.Even if the yellow LED "Start" or "Stop" LED blinks, that does not necessarily mean, that the unit really triggers!Check first, if you get a stable reading by manually re-adjusting the trigger level, or by using the 10:1 divider, AC/DC, and so on.The trigger circuit is slightly dependent on temperature, and may be mis-adjusted in auto mode.The trigger circuit may be calibrated, following the manual ( better use the B manual, it contains less errors, afaik), and should mitigate this error.When I did that on my unit, I was under the impression, that the circuitry is sort of "worn out", not so precise any more.Heads Up!Frank

author: bingo600
author_rank: Super Contributor
timestamp: August 31, 2013, 05:10:16 am
content: Quote from: Dr. Frank on August 30, 2013, 11:16:34 pmThanx Frank i'll have a look at the trigger this wekend/Bingo