Test Operation Guide

Model: GRM-310K

Version 0.8

Author: James GAO

Table of Contents

For Internal Use Only

Test Operation Guide

0. Terminology

DUT: Device Under Test

VSWR: Voltage Standing Wave Ratio

For Internal Use Only

Test Operation Guide

1. Purpose

This document introduces the test operation for UHF reader module GRM-310K. With this test setup, it is possible to evaluate the DC power consumption, transmit frequency, transmit power, read range and read count performance.

For Internal Use Only

Test Operation Guide

2. Test Conditions

2-1. DUT

A GRM-320K module (Figure 1) without any external accessory.

GRM-310K
designed for KAVACH

Figure 1. GRM-320K module

2-2. Test Equipment and Setup

1. DC Power
   The DUT requires a +5 VDC power input. It is recommended to first connect the DUT to a G-Senso development kit motherboard (Figure 2) with an FPC cable, then power the motherboard from the DC jack connector with a DC adaptor or a voltage supply.
   

   Figure 2. G-Senso development kit motherboard

   DUT may be permanently damaged at +5.5 V or above.
2. Serial Port Connection
   A stable serial port connection between the DUT and PC is required. The connection must support 912.6 kbps baud rate. With the G-Senso development kit motherboard, there are two on-board serial ports:
   • Virtual USB serial port on a mini-USB connector
   • RS-232 port on a DB9 connector (Figure 3)
   

   Figure 3. On-board serial ports

For Internal Use Only

Test Operation Guide

3. PC Software
   The ID Tech UI utility (Figure 4) is used to view statistics. Third-party COM port utilities may also be used.
   

   Figure 4. ID Tech UI utility

4. GRA-C07K Antenna
   Matched impedance and minimum VSWR at operating frequencies (Figure 5).
   

   Figure 5. GRA-C07K antenna

   A loose coaxial cable may cause standing waves and hardware damage.
5. GFT-R60K Tag
   Ideal for read count tests (Figure 6). Align tag polarization with antenna.
   

   Figure 6. GFT-R60K tag

6. Foam Support
   Place tag on foam support 60 cm from antenna (Figure 7).
   

   Figure 7. Foam support

For Internal Use Only

Test Operation Guide

3. Test Procedures

3-1. DC Power Consumption

1. Power the module with a DC power supply.
2. Start continuous inventory.
3. Calculate power consumption: Voltage × Current.

3-2. Transmit Frequency

1. Connect DUT to frequency analyzer via coaxial cable.
2. Start continuous inventory.
3. Observe frequencies using max-hold amplitude.

3-3. Transmit Power

1. Connect DUT to frequency analyzer.
2. Start continuous inventory.
3. Measure peak amplitude for transmitted power.

3-4. Read Range

1. Start PC utility to monitor data.
2. Start continuous inventory.
3. Move tag while holding one end (Figure 8) to determine maximum range.

Figure 8. Holding the tag

3-5. Read Count

1. Start ID Tech UI utility.
2. Start continuous inventory.
3. Observe read count in relevant columns.

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