Performing Evaluation; Admv8502-Evalz Quick Start; Network Analyzer Settings; Csv Files - Analog Devices EVAL-ADMV8502 User Manual

User Guide

PERFORMING EVALUATION

ADMV8502-EVALZ QUICK START

To set up the ADMV8502-EVALZ, take the following steps:
1. Connect the RF1 and RF2 ports to a network analyzer (or a
similar instrument). Typically, RF1 and RF2 are connected to
Port 1 and Port 2 on the network analyzer, as shown in
Figure 2.
2. Connect the SDP-S to the 120-pin connector on the
ADMV8502-EVALZ. Do not connect the SDP-S to the PC until
after completing Step 3 or Step 4.
3. On the ADMV8502-EVALZ, slide the S1 switch to select USB
(as shown in Figure 2) to power the ADMV8502-EVALZ from
the 5 V USB supply voltage from the PC via the SDP-S.
4. Alternatively to Step 3, slide the S1 switch to select EXT and
connect the power supplies to the VPOS and VNEG ports. The
applicable voltage range for VPOS is between +3.5 V and
+5.5 V and for VNEG is between −5.5 V and −2.7 V. The
external supply current limits must be set to 20 mA. Expected
supply current drawn for VPOS is 12 mA to 14 mA and for
VNEG is 2 mA to 3 mA. The
per supply pin is typically 10s of microamps or less. Most of
the current drawn from the ADMV8502-EVALZ comes from the
LDO regulators and the status indicator light emitting diodes
(LEDs), DS1 to DS3.
5. Connect a USB cable between the PC and the SDP-S.
6. Open the ACE software. The ADMV8502 Board appears in
the Attached Hardware section of the Start tab. Double-click
on the ADMV8502 Board plug-in to open two tabs, one is the
ADMV8502 Board plug-in view, and one is the ADMV8502 chip
plug-in view.
7. Use the CONFIGURATION section (see
software to initialize the chip. By default, the ADMV8502_Co-
efficients_Bandwidth_Nominal.csv file is loaded into this sec-
tion. Click Apply to send the default settings to the chip and to
allow the main diagram user controls to become editable.

NETWORK ANALYZER SETTINGS

When evaluating the ADMV8502-EVALZ, a good starting point for
configuring the network analyzer is as follows:
Start frequency = 0.01 GHz
►
Start frequency = 4.01 GHz
►
Number of points = 4001
►
Step size = 1 MHz
►
Power level = –10 dBm
►
Measure types = S-parameters (S21, S11, and S22)
►
Format = log magnitude (S21), smith charts (S11 and S22)
►
Calibration = full 2-port
►
analog.com
ADMV8502 chip current drawn
Figure 11) in the ACE
EVAL-ADMV8502

CSV FILES

By default, the ADMV8502_Coefficients_Bandwidth_Nomi-
nal.csv file is loaded into the CONFIGURATION section. This file
contains interpolation coefficients that correspond to approximately
9% bandwidth. There are two additional .csv files provided that
contain interpolation coefficients for approximately 7% and 11%
bandwidth, respectively. To load a different .csv file in the CONFIG-
URATION section, take the following steps:
1. If the Modify button is visible, click to allow changes.
2. Click Restore Software Defaults to zero out the CONFIGURA-
TION section.
3. Click the ... button next to Load Settings from CSV to select
which .csv file to load (see
4. Select the Check to Load Settings check box to load the .csv
file contents into the CONFIGURATION section. Note that a
check mark does not appear when the check box is selected.
5. Click Apply to send out the settings to the hardware.
Figure 11. ADMV8502 CONFIGURATION Section
Figure 11).
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