7 Nov
2010
7 Nov
'10
12:06 p.m.
On 07/11/10 00:46, Philip Pemberton wrote:
That could well be right. The read amplaifier is tryign to process the
signal being sent to the head in write mode.
I assume you've tried both sides of the doubler-head drive...
-tony
There's nothing interesting on TP1, TP2 and
TP3 either. With drive stopped:
TP1 -- 258.45kHz sine, ~200mV amplitude
TP2 -- same sine wave, 180 degrees out of phase
TP3 -- ground
I should also mention that when writing, in MATH ADD mode I get a ~1.5V
(2V if you count the undershoot) square wave. Source signals (TP1 and
TP2) are oddly shaped spikes... almost a square wave but.. not quite.
Stop writing and the signal vanishes.