MS16 Calabration

  • Thread starter Thread starter ron-e-g
  • Start date Start date
Back to this for now :mad:This is my display. Meter at 1k.

SANY0320.webp
 
I assume "meter" means your generator?

You arent far off now.

adjust generator to make the scope display get as close as you readily can to one cycle per two horizontal divisions. This will be close enough to use as the 1Khz tone for alignment procedures.

Going to have to repeat this foe each frequency called out for in the alignment procedure.
 
mdainsd,

Your assumption is correct. THANKS, You and fgonza2 have been a great help to me so far. I think the input cal. Is the first hurdle. The next process's require the cal. tape. I've read the process over and over to the point it all gets jumbled in my mind! I need to actually do the steps to get a real feel for it.

I keep thinking of a video I watch, of a guy Calibrating a Otari MTR 90 and it looks so simple. And one of a guy doing the same thing to a MCI (I think).

Is it just me or is this MS-16 really more complicated? One thing though I do have the extender card! Actually..2.
 
Something must be wrong. When I adj. the shine knob on the generator to as close to 2 segments as possible on the scope (1K). Then connect the output of the generator to the input of the recorder, and the output of the recorder (set to input mode) to the input of the millivolt meter (with dial set to one) both meters (recorders & volt meter) peg on their meters.:facepalm:

Man... I hate to be-labor this but what's up?

BTW there is a small sticker on the generator says 88. Also, I just noticed a red light above the power button on the generator, I thought was a power indicator light. Actually says overload! It has always been on.

Ron
 
The generator output level is too high. The generator has two controls one is for frequency, the other is output level. First connect the generator directly to the millivoltmeter and make sure it says -10 on the green scale with the know set to "1". After that connect it to te recorder input, and the output of the recorder to the millivoltmeter. You have two settings to make, one is frequency, the other is the output level.
 
Thanks fgonza2. That helps. I started pulling the cards and using the extender. I quickly realized this was a wast of time. I did notice a jumper wire on the pcb of every card. Is this normal or some mod?

Done! adj. 16 trk. of input and VU levels.

Now about this peak led section!? I should raise the generator output till the millivoltmeter reads ?
 
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I am assuming "calabration", is the same as "calibration", but only in Southern Italy...lol (Calabria?)
 
Don't worry about the peaks. Ignore that for now.

The jumper is normal it is on all the cards. Manufacturing issue, most of MS16s and Tascam 58s (same card) have it. Now, time for the calibration tape.
 
I've completed the cal. steps up to Bias level. (skipping over 7-6-4 Peak Led, and 7-6-7 Bias Tuning and Bias Trap). Everything dialed in real good! Question; can I use the oscillator on my console for the 10k signal to do the bias level?
 
yes you can. but measure the output level first with your RMS meter. To see if the 0db in the console is -10 in the green scale. What matters here is that you know what the reference level is. However as you already calibrated the inputs on the recorder. You can simply move the fader until the recorder VU is at 0db
 
Thanks fgonza2. Or.."all things being equal" I should be able to push ( x 1000) on the generator?
 
Yes. But now turn the scopes timebase control three clicks clockwise to 50us position. Now 10,000Hz tone will take the same 2 horizontal divisions per complete cycle. :thumbs up:
 
I'm back. I had to finish up the rack cabinet over the m-600. I'll post some pictures later.

So now I'm ready to calibrate the Bias Level. I get to section 3 of the manual and it says to " switch the output select switch to Repro" then record the 10K signal. Soon as I do of course, I lose the signal in the channel 1 meter. (I'm starting on channel 1).

Is the manual wrong?
 
1. with the recorder in stop mode and input mode, you should see the 10k signal in the VU meter at "0 db" just before the red.

2. Switch to repro - the VU meter goes down like no signal is in, because you are now monitoring the repro head, not the input.

3. Press REC/PLAY and you should see something again on the VU meter
 
Hum..something must be amiss. I have the generator connected to the input via RCA. I have the Millivolt connected to the output also RCA. The XLR's are still connected to the mixer. With the generator level adj. so the millivolt meter reads -10 or 10K, and the recorder in the input mode the recorders VU measures 5 db. Even less when switched to REPRO and REC/PLAY.
 
disconnect the XLRs, leave only the RCAs. Reason is that the load on the circuit (impedance) is higher or lower when you do that.
 
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