AN2744
Troubleshooting
51/56
What to check
:
a)
Check if JP2 and JP3 are closed. Please refer to
for receiving path
configuration.
b)
Check if carrier frequency is present on RAI pin voltage with the oscilloscope
ground probe connected to the AVSS signal ground pin.
c)
Check that programmed board channel (CH1/CH2) is matching the carrier
frequency selected through the control register panel of the reference design
software window.
d)
Check preamble detection setting on the control register panel of the reference
design software window.
e)
Check if data are present on RxD pin.
6.
PROBLEM
: During a ping test or a transmission test, the ST7538Q reference design
board shows a high bit error rate.
Note:
This point refers to a half-duplex communication involving two ST7538Q reference design
boards communicating with each other.
What to check
:
a)
Check that both reference design boards are programmed to transmit/receive on
the same carrier frequency.
b)
Check on both reference design boards that programmed board channel
(CH1/CH2) is matching the carrier frequency selected through the control register
panel of the reference design software window.
c)
Check preamble detection setting on the control register panel of the reference
design software window.
d)
Check if data are present on RxD pin.
Содержание ST7538Q
Страница 3: ...AN2744 Contents 3 56 Appendix A Board layout 53 10 Revision history 55...
Страница 15: ...AN2744 Board description 15 56 Figure 7 Modem and coupling interface schematic...
Страница 16: ...Board description AN2744 16 56 Figure 8 Power supply schematic HIGH VOLTAGE SECTION...
Страница 53: ...AN2744 Board layout 53 56 Appendix A Board layout Figure 50 PCB layout top view...
Страница 54: ...Board layout AN2744 54 56 Figure 51 PCB layout bottom view...
