Troubleshooting Waveforms: Bluetooth Troubleshooting Waveforms 6-39
Bluetooth Command to RX 2.402 GHz
The RSSI should increase significantly in the presence of a 2.402 GHz nearby signal. Using an
external signal generator source signal of 2.402 GHz connected to a an external Bluetooth antenna,
bring it close to the Bluetooth antenna contact pin (M1301) on Main board, send this command to
read the 2.402 GHz RSSI
If no signal is detected, the response will be 803900020d80.
If no test equipment is available, an APX radio with BT functional could be used to verify the test
radio. Hold the speaker grilles together on both radios. One radio could be used to TX while the
other radio is used to RX.
Low Frequency (LF) Command to TX 125 kHz CW
Set the spectrum analyzer at 125 kHz center, 10 MHz span, RBW of 1 kHz, a VBW of 3 kHz, and a
sweep time of 25 ms. Use this command to verify the LF coil is emitting a 125 kHz pulse by probing
C2454 or C2457 on the Keypad board with a spectrum analyzer:
Low Frequency (LF) Command to RX 125 kHz
Use this command to verify the LF coil is receiving a 125 kHz pulse generated by a signal generator
by tapping on C2454 or C2457. The result contains the LF RSSI. This command is not in the initial
SW release but is included in SR 7.11 SW:
If no signal is detected, the response will be 8039010305.
A fast verification that requires no additional test equipment can be done by sending the LF TX
command, then the LF RX command directly afterwards. If both the transmitter and receiver are
working, the response should be 803900030x, where x is typically between 4 and 6. Even if the
response passes, the LF coil may be physically damaged. It is best to open the radio and observe
the coil to ensure it is not damaged.
To test the LF RX using SR 7.9 SW, a POD accessory is required to verify communication.
Table 6-3. Bluetooth Command to RX
TEST RCMPRAW CMD RESPONSE
Bluetooth RX at 2.402 GHz rcmpraw:0039020D00 Success: 803900020dBB, where BB
is the RSSI in hex.
Failure: 803901
Table 6-4. Low Frequency Command to TX
TEST RCMPRAW CMD RESPONSE
Low Freq. 125 kHz TX rcmpraw: 00390303 Success: 8039000303
*
Failure: 8039010303
*
Note: * In SR 7.9 SW release, the response is 8039000302 for a success and 8039010302 for a failure.
Table 6-5. Low Frequency Command to RX
TEST RCMPRAW CMD RESPONSE
Low Freq. 125 kHz RX rcmpraw: 00390305 Success: 80390003BB, where BB is the RSSI in hex.
Failure: 803901
To Next Page
Loading...
Need help?
General
