7
dc1984af
DEMO MANUAL DC1984A
quick start proceDure
RF Performance Measurements
1. Connect all test equipment as shown in Figure 5, with the
signal generators and the DC power supply turned off.
2. Increase the DC power supply voltage to 5V, and verify
that the total current consumption is close to the figure
listed in the Performance Summary. The supply voltage
should be confirmed at the demo board V
CC
and GND
terminals to account for test lead ohmic losses.
3. Set the LO source (signal generator 1) to provide a
0dBm CW signal at appropriate LO frequency to the
demo board LO input port.
4. Set the RF sources (signal generators 2 and 3) to
provide two –10dBm CW signals, 2MHz apart, at the
appropriate frequencies to the demo board IN port.
5. Measure the resulting output on the Spectrum Analyzer:
6. Calculate output 3rd order intercept:
OIP3
= ∆
IM3
2
+
P
OUT
Where ΔIM3 = P
OUT
– P
IM3
. P
OUT
is the lowest fundamental
output signal power. P
IM3
is the highest 3rd order inter-
modulation product power.
7. Turn off one of the RF signal generators, and measure
conversion gain, IN-OUT isolation, LO-OUT leakage,
and input 1dB compression point.
Noise Figure Measurement
1. Configure and calibrate the noise figure meter for mixer
measurements.
2. Connect all test equipment as shown in Figure 6, with
the signal generator and the DC power supply turned
off.
3. Increase the DC power supply voltage to 5V, and verify
that the total current consumption is close to the figure
listed in the Performance Summary. The supply voltage
should be confirmed at the demo board V
CC
and GND
terminals to account for test lead ohmic losses.
4. Measure the single-sideband noise figure.
pcb layout
Layer 1, Top Layer
Layer 2, Ground Layer