AC164101 Microchip Technology, AC164101 Datasheet - Page 15

• Manufacturer Part Number: AC164101
• Description: MODULE TRANSMITTER RFPIC 433MHZ
• Manufacturer: Microchip Technology
• Type: Transmitterr

Specifications of AC164101

• Frequency: 433MHz
• Modulation Type: ASK
• Frequency Range: 433.92MHz
• Module Interface: USB
• Peak Reflow Compatible (260 C): Yes
• Leaded Process Compatible: Yes
• Wireless Frequency: 433.92 MHz
• Modulation: ASK
• For Use With: PICkit 1 FLASH Starter Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICkit™ 1
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

2.7
2.8
© 2003 Microchip Technology Inc.
XMIT_TEST
PRESENTATION PAL
This program implements two tests that can be used to verify RF performance of the rfPIC
Development Kit transmitter modules using a spectrum analyzer and calibrated antenna.
The tests start when the indicated push button is pressed and stop when the push button
is released. The processor sleeps between tests to conserve battery power.
2.7.1
Press push button GP3 (SW2). This test generates a constant unmodulated output for
measuring peak output power. This test can be used for regulatory pre-compliance
testing and antenna tuning.
2.7.2
Set potentiometer GP0 in one of four quarter positions to choose maximum, high,
medium, or low speed signal rate. Then press GP4 (SW1) and fine adjust potentiome-
ter GP1 for the desired signal rate. The signal is a square wave and does not exactly
match the PWM or Manchester spectrums, but is quite useful to determine system
performance. Table 2-1 demonstrates the approximate signal rates. Note that
increasing the analog voltage decreases the signal rate and that the NRZ bps is double
the modulation frequency.
TABLE 2-1:
The Presentation Pal application turns your rfPIC Development Kit 1 into a wireless
slide show presentation helper. By pressing the push-buttons on the transmitter
module, the commands are converted to page-up and page-down keyboard
commands for a personal computer. There are two programs required for this
application.
2.8.1
Step 1:
The first step in converting your rfPIC Development Kit 1 is to program a blank
PIC16C745 8-bit CMOS microcontroller with USB (not included with the rfPIC
Development Kit) with pres_pal.hex. The PIC16C745 is a one time programmable
(OTP) microcontroller and can be programmed on a PICSTART
II programmer.
Step 2:
Remove the PICkit 1 FLASH Kit programmed PIC16C745 from socket U1. Insert the
PIC16C745 programmed with pres_pal.hex into socket U1.
75-100%
Peak Power Measurement
Data Modulation and Bandwidth Measurement
25-50%
50-75%
USB Firmware - pres_pal.hex
0-25%
GP0
APPROXIMATE SIGNAL RATES
Preliminary
52.6-3.64 kbps
3.64-1.88 kbps
1.88-1.27 kbps
1.27-0.96 kbps
(0-100% GP1)
Demonstration Programs
NRZ bps
NRZ Pulse Width
®
787-1042 µsec
(0-100% GP1)
275-530 µsec
531-786 µsec
Plus or PRO MATE
19-274 µsec
DS70093A-page 11
®