For sale bare boards for Delta Pulse/Sniffer XR-71

[kt315]

ground is connected to potentiometers
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no no. this is '+E' potencial - for shielding, i call it 'COLD COIL END'.
you have to connect your probe GND to '-E' or '-12V' point.

[chuubaba]

ground is connected to potentiometers
---
no no. this is '+E' potencial - for shielding, i call it 'COLD COIL END'.
you have to connect your probe GND to '-E' or '-12V' point.

T2 has AC current or DC?

This is the wave form on 5mS/DIV 0.5V/DIV DC setting. Looks like the frequecy is 50Hzs. If I turn the PPS then frequency does not change. If I adjust the PPS then the small dots near the wave form start moving fast or change movement direction.

If i connect GND of the probe with -12V and take measurement then the wave form looks like this.

This is the wave form in X-Y mode.

[kt315]

If i connect GND of the probe with -12V and take measurement then the wave form looks like this. IMG_20191021_172424.jpg
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near waiting. try synchronize it to clear signal, without doubling.

T2 is AC voltage.

[chuubaba]

If i connect GND of the probe with -12V and take measurement then the wave form looks like this. IMG_20191021_172424.jpg
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near waiting. try synchronize it to clear signal, without doubling.

T2 is AC voltage.

This is AC voltage 20mV/DIV 2mS/DIV 5DIV = I have tuned PPS to achieve 100Hzs. Is this ok? It gives a totally different look on X-Y mode !

[kt315]

come in point T3. twist PULSE WIDTH pot (DEPTH). you have to see changing of signal width from 150 to 500us.

DO NOT TOUCH THAT YOU DO NOT KNOW. DO NOT TURN ON X-Y MODE.

[chuubaba]

come in point T3. twist PULSE WIDTH pot (DEPTH). you have to see changing of signal width from 150 to 500us.

DO NOT TOUCH THAT YOU DO NOT KNOW. DO NOT TURN ON X-Y MODE.

OK I will not touch X-Y MODE again.

With same settings of oscope i touch the probe to T3 and nothing changes. See this picture when DEPTH pot is turned to full left.
Now i turn the DEPTH pot to full right and there is very small change in frequency a significant change in Y scale (volts??)

Notice the change from test of T2.
Is this ok? or I don't know how to do this test?

[kt315]

switch o-scope timing range on 100us and give pics 'full left' and 'full right'.
you voltage range on 0.5V. with probe x10 you get 5V on cage.

[chuubaba]

switch o-scope timing range on 50us and give pics 'full left' and 'full right'.
you voltage range on 0.5V. with probe x10 you get 5V on cage.

Scope set to AC voltage. Probe 10x.
Timing set to 50uS/DIV. Volts set to 0.5V/DIV. DEPTH pot to "full left".
Same Time and Volts settings. DEPTH pot turned to "full right".

DEPTH pot in almost "middle position".

[kt315]

do you see 100us and 400us pulse width or you see here nothing?

[chuubaba]

do you see 100us and 400us pulse width or you see here nothing?

I am unable to notice the result of this test. Is this test a "failure" or a "success"?

[kt315]

write what pulse width you see clockwise and counterclockwise pot position. i did not write failure or success.
YOU SEE BY YOUR EYES ON O-SCOPE SCREEN YOURSELF.

[chuubaba]

Scope time setting was 50uS/DIV
The probe is 10x so one DIV is 500uS.
The pot to "Full Left" = 1000uS
Pot to "Full Right" = 4100uS

Is this correct?

[kt315]

Timing set to 50uS/DIV.

[chuubaba]

Scope time setting was 50uS/DIV
The probe is 10x so one DIV is 500uS.
The pot to "Full Left" = 1000uS
Pot to "Full Right" = 4100uS

Is this correct?

[kt315]

Scope time setting was 50uS/DIV
The probe is 10x so one DIV is 500uS.

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failure. your mind failure.

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The pot to "Full Left" = 1000uS
Pot to "Full Right" = 4100uS
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your mind failure.