ADF4112 AD [Analog Devices], ADF4112 Datasheet - Page 17

• Manufacturer Part Number: ADF4112
• Description: 300 MHz to 1000 MHz Quadrature Modulator
• Manufacturer: AD [Analog Devices]

CHARACTERIZATION SETUP
The primary setup used to characterize the ADL5370 is shown
in Figure 38. This setup was used to evaluate the product as a
single-sideband modulator. The Aeroflex signal generator supplied
the local oscillator (LO) and differential I and Q baseband
signals to the device under test, DUT. The typical LO drive was
0 dBm. The I channel is driven by a sine wave, and the Q channel
is driven by a cosine wave. The lower sideband is the single
sideband (SSB) output.
250kHz TO 6GHz SIGNAL GENERATOR
VPOS +5V
5.000
FREQ 4MHz
AGILENT E3631A
AEROFLEX
POWER SUPPLY
+
BIAS 0.5V
BIAS 0.5V
AGILENT 34401A
6V
0.175 ADC
MULTIMETER
–
0.175A
+
COM
±25V
GAIN 0.7V
GAIN 0.7V
IFR 3416
LEVEL 0dBm
–
90°
CONNECT TO BACK OF UNIT
I OUT
Figure 38. Characterization Bench Setup
I/AM
I
Q OUT
Rev. 0 | Page 17 of 20
Q/FM
Q
OUT
VPOS
RF
IP
IN
QP
QN
0°
FMOD
The majority of characterization for the ADL5370 was performed
using a 1 MHz sine wave signal with a 500 mV common-mode
voltage applied to the baseband signals of the DUT. The baseband
signal path was calibrated to ensure that the V
offsets on the baseband inputs were minimized, as close as
possible, to 0 V before connecting to the DUT.
1
See the
GND
and V
OUT
LO
LO
QOS
Carrier Feedthrough Nulling
R AND S SPECTRUM ANALYZER
.
OUTPUT
FMOD TEST SETUP
FSU 20Hz TO 8GHz
+6dBm
RF
IN
section for the definitions of V
IOS
1
and V
ADL5370
QOS
IOS