CP80 and CP80 Plus Service Manual
2-35
Signal Modulation Summary Diagram
Amplitude Modulation:
The magnitude (height) of the
carrier signal is varied according
to the height of the data signal.
This is what is used in AM radio.
Note: The blue data signal is
shown here for clarity. It is not
actually present in the actual
modulated signal.
Frequency Modulation:
The frequency of the carrier
signal is varied according to the
height of the data signal. This is
what is used in FM radio.
Note: The modulated frequency
remains close to the carrier
frequency, but the drawing is
exaggerated for clarity.
Amplitude Shift Keying:
This is a digital variant on the
AM modulation. It comes in two
common forms: 100% and 10%.
Note: 10% modulation
(ASK10%) means the carrier is
modulated by only 10%. 100%
modulation means that the
carrier signal is fully modulated.
Both of these variants are shown
to the right.
Load Modulation:
The card switches the resistance
of its antenna, which alters the
current in the transmitter.
Note: This is a complex topic
and will be discussed in greater
detail later.
Phase Modulation:
A data transition is signified by
a shift in the signal’s phase. In
this case, the phase is shifted 180
degrees by inverting the signal.
Summary of Contents for CP80
Page 1: ...Datacard CP80 and CP80 Plus Card Printers Service Manual May 2007 Part No 539490 002 Rev C ...
Page 14: ...1 4 Introduction ...
Page 17: ...CP80 and CP80 Plus Service Manual 2 3 Print Engine Functional Block Diagram ...
Page 18: ...2 4 Theory of Operation Laminator Functional Block Diagram ...
Page 22: ...2 8 Theory of Operation LCD Service Mode Menu Diagram ...
Page 52: ...2 38 Theory of Operation ...
Page 158: ...6 6 Removal and Replacement Print Engine Front Wire Routing Diagram ...
Page 159: ...CP80 and CP80 Plus Service Manual 6 7 Print Engine Duplex and Printhead Wire Routing Diagram ...
Page 160: ...6 8 Removal and Replacement Laminator Front Wire Routing Diagram ...
Page 161: ...CP80 and CP80 Plus Service Manual 6 9 Laminator Rear Wire Routing Diagram ...
Page 162: ...6 10 Removal and Replacement Power Supply Wire Routing Diagram ...
Page 163: ...CP80 and CP80 Plus Service Manual 6 11 Print Engine Cable Connection Diagram ...
Page 164: ...6 12 Removal and Replacement Laminator Cable Connection Diagram ...