It just keeps getting stranger all the time... this morning, I powered up the UPL and.. it booted normally!
So whatever is causing the problem, it's on and off intermittent.
So whatever is causing the problem, it's on and off intermittent.
UPL error on boot
Hi,
Seems like I have the same kind of issue with my ULP16 that just stopped from booting up
Floppy error (40)
CMOS checksum error
CMOS battery error
I'm thinking about replacing the battery, but what more would be needed according to your experience?
BR
/Anders
Hi,
Seems like I have the same kind of issue with my ULP16 that just stopped from booting up
Floppy error (40)
CMOS checksum error
CMOS battery error
I'm thinking about replacing the battery, but what more would be needed according to your experience?
BR
/Anders
If you're lucky, it's just the CR2032 button cell that expired. It's on the component side of the top PCB, which is the PC motherboard, mounted inverted over the Digital PCB.
Be careful with the keyboard wiring that goes to the DIN jack on the rear apron. Those wires are very brittle and one usually breaks every time I flip this board over.
Unfortunately, my UPL 16 does not respond to a new battery. It's got intermittent issues. Sometimes it will retain CMOS for a few months and other times not. I hope you don't have that problem. I have to leave my running 24/7 and I already have a $740+ monthly electric bill without leaving equipment running overnight.
Be careful with the keyboard wiring that goes to the DIN jack on the rear apron. Those wires are very brittle and one usually breaks every time I flip this board over.
Unfortunately, my UPL 16 does not respond to a new battery. It's got intermittent issues. Sometimes it will retain CMOS for a few months and other times not. I hope you don't have that problem. I have to leave my running 24/7 and I already have a $740+ monthly electric bill without leaving equipment running overnight.
Hi
I just replaced the CR2032 battery. But it still did not boot.
But after doing the reconfiguration according to:
Hard disk is not detected | FAQ | Rohde & Schwarz
Its up and running again 🙂
I just replaced the CR2032 battery. But it still did not boot.
But after doing the reconfiguration according to:
Hard disk is not detected | FAQ | Rohde & Schwarz
Its up and running again 🙂
Did you disable the on board controllers? Because if not, the Digital board controller will not be visible to BIOS. The hard drive is connected to the digital controller, not the on board controller.
Yes, I disabled all integrated peripheral settings. Saved bios settings and rebooted. The ULP found the hdd and powered up as it should 🙂
I keep a printout from the UPL support website for this reason. About 8 or 9 settings to change, but all of them must be done to prevent I/O conflicts and failed bootups.
Thanks for sharing all of this work, amazing resource. I recently purchased one of these for myself and have read this a few times in anticipation of it actually arriving.
Just wondering if there was any information regarding option B1 - the Low Distortion oscillator. Looking over various listings gives me the impression this is a relatively rare option, or at least those who have it aren't selling!
Have to assume this is a hardware option, any information on it?
Cheers
Just wondering if there was any information regarding option B1 - the Low Distortion oscillator. Looking over various listings gives me the impression this is a relatively rare option, or at least those who have it aren't selling!
Have to assume this is a hardware option, any information on it?
Cheers
The B1 is a hardware card. It contains a crystal-generated oscillator (with additional.shielding), which has lower THD than a digitally-generated one.
On our UPVs, it gives around 6dB improvement THD+N. I'd imagine this is the same on paper for a UPL.
They are surprisingly rare on UPLs. I am sure there is a reason for this, I.e. the demographics break down more in favour of broadcast / commercial products than audio nerds.
NB - I have never bothered comparing the B1's advantage in terms of THD alone against THD+N... This would be interesting... I might do it later -) I suspect it will be greater for THD alone as the noise from the analyser will account for a good proportion of THD+N
On our UPVs, it gives around 6dB improvement THD+N. I'd imagine this is the same on paper for a UPL.
They are surprisingly rare on UPLs. I am sure there is a reason for this, I.e. the demographics break down more in favour of broadcast / commercial products than audio nerds.
NB - I have never bothered comparing the B1's advantage in terms of THD alone against THD+N... This would be interesting... I might do it later -) I suspect it will be greater for THD alone as the noise from the analyser will account for a good proportion of THD+N
Last edited:
Thanks for the response! Yes mine is going to arrive with every single GSM feature fitted so no big secret as the to original installation environment.
-Miles
-Miles
Interestingly enough, for combined THD+N, the UPV-B1 gives -110 (2V / 1KHz) with B1 off, and -113 with B1 switched on.
In terms of THD alone, the B1 gives a 6dB improvement, jumping from -110/-111 to -116/-117
So there you go!
In terms of THD alone, the B1 gives a 6dB improvement, jumping from -110/-111 to -116/-117
So there you go!
I'm a little confused here. I have seen and even built audio frequency crystal oscillators but they are not flexible and the crystals are huge. Or is this an independent crystal referenced linear oscillator? Schematics and pictures of either would be really interesting.
I would think that a digital oscillator would have the lowest distortion of all. Just increase the bit depth. A 36 bit D/A should have unmeasurable distortion levels.
A 36 bit ADC would (theoretically) have extremely low distortion.
IF:
You'd have to use something other than floats or double precision floats to hold your numbers. I'm pretty darn sure that you'll run into some of the imprecision of floating point numbers when generating 36 bit values. I'm also pretty sure that those imprecisions will cause distortion in various ways that will have you pulling your hair out of you don't know about floating point imprecisions.
At 36 bits, you are at around 0.01 nanovolt per count. Can you imagine building a circuit where the noise from the circuit itself is low enough to get that precision? I can't. Microvolts are hard enough.
IF:
- The program generating the values is accurate to 36 bits.
- The analog parts of the ADC are up to handling the required dynamic range.
You'd have to use something other than floats or double precision floats to hold your numbers. I'm pretty darn sure that you'll run into some of the imprecision of floating point numbers when generating 36 bit values. I'm also pretty sure that those imprecisions will cause distortion in various ways that will have you pulling your hair out of you don't know about floating point imprecisions.
At 36 bits, you are at around 0.01 nanovolt per count. Can you imagine building a circuit where the noise from the circuit itself is low enough to get that precision? I can't. Microvolts are hard enough.
Many math softwares calculate in float64 (double), where would the problem with sine precision and conversion to 36bit integer arise?
Test of sine generation in octave (= matlab):
But I may be missing something...
Test of sine generation in octave (= matlab):
Code:
>> format bit
>> sin(0.5)
ans = 0011111111011110101011101110100001110100010010110000010111110000
>> sin(0.5000000000000001)
ans = 0011111111011110101011101110100001110100010010110000010111110010
>> tic; sin(0.5000000000000001); toc
Elapsed time is 4.69685e-05 seconds.But I may be missing something...
See if you can measure the battery while it is in-circuit in the powered-down analyzer. Maybe the cell is getting pulled down by a problem in the analyzer. Of course, do clean all the contacting surfaces first to rule that out as the cause.
I stand corrected. Thank you!
I read somewhere that the B1 was crystal-generated. I ought to have checked my source before repeating it... TBH, I have never given much thought to how an uber-low THD oscillator is created.