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Analyzer Q1
Witschi Electronic Ltd
The signal is amplified, filtered and digitalised. The signal period is measured with a highly accurate
reference time base. The difference between the period actually measured and the nominal period
for the zero deviation is converted into seconds per day (s/d) or seconds per month (s/m) and
displayed accordingly.
16.1.2
Magnetic Signal Source from the Motor
This test mode is used with all closed quartz watches with step motor.
Based on the magnetic signal, the instrument determines the rate deviation as well as the pulse
parameters
Period, Pulse Width
and
Drive Level.
Signal Acquisition
This test mode records the magnetic stray field of the motor coil.
The instrument recognizes the signals of analogue watches and selects itself the
Motor magn.
signal
source
.
The watch must be positioned on the signal transducer with the back downward. If the wristlet of
the watch is in the way, the watch can be positioned with the dial downward, causing however a
certain worsening of the signal quality.
If the signal is too weak, it is necessary to shift or rotate slightly the watch on the transducer to find
a better location for capturing the signal.
Measurement time
The measurement time for analogue watches must correspond to a pulse period of the stepping
motor or to a multiple thereof. Watches with inhibition compensation must be tested over an
inhibition period or a multiple thereof.
When the
Time
parameter is set to
Auto
, the correct measurement time is selected automatically.
The desired time can also be selected manually for special measurements.
16.1.3
Motor Current Signal Source
This test mode is used for quartz watches with a step motor that are supplied from the Analyzer Q1.
Based on the current pulses, the instrument determines the rate deviation as well as the pulse
parameters
Period
,
Pulse Width
and
Drive Level
.
Signal Acquisition
This test mode records the electrical current pulses of the step motor.
The instrument selects itself the
Motor current
signal source as soon as a supply current is flowing.
The
step. motor
LED blinks with every motor pulse and indicates the strength of the recorded signal.
Measurement Time
The measurement time for analogue watches must correspond to a pulse period of the stepping
motor or to a multiple thereof. Watches with inhibition compensation must be tested over an
inhibition period or a multiple thereof.
When the
Time
parameter is set to
Auto
, the correct measurement time is selected automatically.
The desired time can also be selected manually for special measurements.
16.1.4
LCD Signal Source
This test mode is used with most LCD watches.
Signal Acquisition
