Permissive Change Letter

FCC ID: GQ4-38T

Cover Letter(s)

Download: PDF
FCCID_817895

In-Key Transmitter Design Comparison For FCC Class 2 GQ4-38T GQ4-38T Class 2 PCB Top Side No change to PCB L2 changed to 0 ohm jumper PCB Trace Top Side No Change to circuit board traces FCC_Compare_Class2_L2Short.xls 6/22/07

In-Key Transmitter Design Comparison For FCC Class 2 GQ4-38T GQ4-38T Class 2 PCB Trace Bottom Side No changesto PCB traces FCC_Compare_Class2_L2Short.xls 6/22/07

In-Key Transmitter Design Comparison For FCC Class 2 GQ4-38T GQ4-38T Class 2 Schematic For 575L Class 2 change L2 not populated, replace by 0 Ohm jumper. Purpose for not using L2 is ground plane change from GQ4-29T design reduced transmitter pulse widths slightly, TRW considered not enough margin for pulse width limits for receiver to accept. To improve on pulse widths changed high frequency filter feedback loop on RF transistor to return pulse widths to the same value as GQ4-29T . Originally L2 and C2 added to design to filter 1.2GHz frequency where outer key L2 is not populated (short) housing (not made by TRW) tends to resonate. Filter was not needed. FCC_Compare_Class2_L2Short.xls 6/22/07


Document Created: 2007-07-05 17:18:50
Document Modified: 2007-07-05 17:18:50
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC