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MAX2170 Evaluation Kit
Quick Start
Recommended Equipment
This section lists the recommended test equipment to
verify operation of the MAX2170. It is intended as a
guide only, and some substitutions are possible:
? One RF signal generator capable of delivering at
least +5dBm of output power at the operating fre-
quency (HPE4433B or equivalent)
? An RF spectrum analyzer that covers the MAX2170
operating-frequency range (e.g., FSEB20)
? A power supply capable of up to 1A at +2.7V to
+6.0V
? One ammeter for measuring the supply current
(optional)
? 50 ? SMA cables
? 50 ? BNC cables
? A network analyzer (e.g., HP 8753D) to measure
small-signal return loss (optional)
Procedure
Measurement Considerations
The MAX2170 EV kit includes an on-board buffer that
converts the baseband differential outputs to a single-
ended output (see Figure 1 for details). The buffer is
configured for a gain of one. The output of the buffer
consists of a 50 ? resistor in series for matching to RF
test equipment. Note that there is a 6dB loss at the out-
put if 50 ? test equipment is used. This loss must be
accounted for when measuring gain.
Connections and Setup
The MAX2170 EV kit is fully assembled and tested. This
section provides a step-by-step guide to operating the
EV kit and testing the device’s function. Caution: Do
not turn on the DC power or RF signal generators until
all connections are made:
1) Connect a DC supply set to +3.0V (through an
ammeter if desired) to the VCC and GND terminals
on the EV kit. Do not turn on the supply. Note that
VCC and VCC2 on the EV kit board are shorted
together through JP3.
2) Connect a DC supply set to +2.4V (maximum gain)
to the RFAGC terminal on the EV kit. Do not turn on
the supply.
3) Connect a DC supply set to +2.4V (maximum gain)
to the BBAGC terminal on the EV kit. Do not turn on
the supply.
4) Connect one RF signal generator to either the VHF-
III, FM, or L-BAND input through the SMA connec-
tors J3 and J4, respectively. Do not turn on the gen-
erator’s output.
5) Connect the baseband output on the EV kit to a
spectrum analyzer through a BNC cable.
6) Connect the EV kit board to the PC through a paral-
lel cable.
7) Turn on the DC supply. The supply current should
read approximately 70mA.
8) Run the control software on an IBM-compatible PC.
Using the control software, configure the following:
a) Select the desired band of operation and chan-
nel through the Block section of the software’s
graphical interface.
b) Based on the LO frequency, the EV kit software
automatically sets the appropriate tracking-filter
settings in VHF/FM mode.
c) The power-detector threshold is factory-calibrat-
ed to a typical input power of -52dBm. This infor-
mation is stored in bits <7:5> of register 00 in the
ROM table. The EV kit software automatically
loads the information stored in bits <7:5> of reg-
ister 00 in the ROM table into bits <7:5> in regis-
ter 08 to set the proper power-detector
response.
d) The baseband filter is factory-trimmed to have a
typical bandwidth (-3dB corner) at 0.8 MHz. The
information is stored in bits <2:0> of register 04
in the ROM table. The EV kit software automati-
cally loads the information stored in bits <2:0> of
register 04 in the ROM table into bits <2:0> in
register 08 to set proper baseband filter band-
width.
e) The VCO Auto Selection (VAS) is already
enabled through default settings (this allows the
software to pick the appropriate VCO sub-band
for the desired operation frequency). If desired,
the VAS can be turned off to manually select the
desired sub-band. VAS can be disabled through
the VAS_EN bit on the Registers or Block sec-
tion of the software.
9) Activate and set the power level of the RF generator
to achieve 1V P-P at the IF connector output or
0.5V P-P (-2dBm) when loaded by a 50 ? instrument.
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