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Evaluation Kit User Manual
EV9000
2001 Consumer Microcircuits Limited
18
UM9000/2
Figure 9: Channel B Transmit Path
Element Purpose
Component
Designator
Approximate
Range
v6
Used to bias the output signal to a user desired mean
level.
R46
-5V to 5V
E9
Jumper to select choice of ac or dc coupled TXOUTB
connector. Jumper installed for dc coupling.
E9 not
applicable
Table 11: Channel B Transmit Path Adjustments and Controls
3.2.5 Jumpers
Several jumpers are provided to select various functions. They are described in Table 12 and
their positions indicated in Figure 10. Section 3.2.4 also indicates jumper functions in schematic
form. In setting E5, E6, E10 and E11, it should be noted that crystal settings are application, not
device, dependant. If capacitors C3, C7, C12 or C16 are not installed, some of the jumpers will
not operate as described.
Name Function
Positions
Default
E1
Connect PTT and CS signals
CAUTION: This jumper should not be
installed when the +5VM supply is
less than the +5V supply. For this
case, the header pins may be
connected with a 100k
Ω
Ω
Ω
Ω
resistor
without installing the jumper
block.
install in
E2
Channel A noise injection coupling
(see Figure 6)
in = dc
out = ac
in
E3
invert channel A Rx path
(see Figure 6)
A = invert
B = no invert
B
E4
Channel A Tx output coupling
(see Figure 7)
in = dc
out = ac
in
E5
Channel A Xtal frequency
(must match jumper E6 position)
A = 8.192MHz (eg. CMX909B)
B = 9.8304 MHz (eg. CMX969,
FX919B/929B)
B