JEOL JSPM-5200 Instructions Manual page 35

• FMD
Frequency of the cantilever vibration.
The indicated value corresponds to the characteristic frequency of the cantilever in
the AC mode AFM operation with the FM detection method. Since a PLL
(phase-locked loop) is used for the frequency-to-voltage conversion circuit, the
indicated value corresponds to the lock-range frequency.
• PHASE
The indicated value corresponds to the displacement between the phase of the
excitation signal to the cantilever and the phase of the (A-B) signal, in the AC
mode AFM operation with the Slope-detection method.
③ Indicator
Indicates the output of the signal selected using the indicator selection knob in V
(volt).
④ HEAT terminal
Used when heating the specimen on the specimen stage. Usually, it is connected to
an optional heating power supply using a special heating cable.
The bias voltage to be applied to the specimen is superposed on
the "B+" wire in the heating cable. Therefore, the heating power
supply must be electrically isolated from the ground (GND). If one
of the heating cable wires is grounded, the bias voltage circuit
might be damaged.
TMPM5200-2
3 CONFIGURAT ON AND DESCRIPTIONS OF COMPONENTS
As the RMS value is an output value of the signal input to the RMS-DC circuit,
the higher the frequency becomes, the greater the effect of the low-pass filter
inserted before the RMS-DC circuit, thus attenuating the amplitude. So, the
RMS value sometimes becomes smaller than the (A-B)/(A+B) value that is
output to AUX1.
I
CAUTION
3-11