AT Command Manual for Sierra MC87XX Module

Test Commands
Rev 2.9 Oct.08 81
Turning on the TX in GSM mode
ThesequenceofATcommandsthatfollowsturnsthetrans‐
mitteronandadjuststheoffsets.
Turning on the RX and reading RSSI in
WCDMA mode
Thefollowingsequenceofcommandsturnsonthereceiver
andreadstheRSSI.

Table 5-4: Command sequence for setting GSM
offsets
Command Function
1. AT!ENTERCND=
“password”
Enters the password, providing
access to the necessary commands
2. AT!DAFTMACT Puts the modem into factory test
mode
3. AT!DASBAND=12 Sets the frequency band to GSM
1900
4. AT!DASCHAN=661 Sets the channel to 661
5. AT!DAGSTXFRAME
=0,1,3000,0
Configures TX slot 0
Enables slot on
Sets slot power level to 3000
(Power level
* 100, where Power
level is 30
dB)
Sets Modulation Code Scheme to
MCS1.
6. AT!DASTXON Turns the TX PA on
7. AT!DASPDM=0,2240 Offsets the tracking LO by 2240.
(You may need to run this command
repeatedly, adjusting the frequency
offset until you obtain the desired
frequency.)
Table 5-5: Command sequence for reading the RSSI
in WCDMA mode
Command Function
1. AT!ENTERCND=
“password”
Enters the password, providing
access to the necessary commands
2. AT!DAFTMACT Puts the modem into factory test
mode
3. AT!DASBAND=16 Sets the frequency band to
WCDMA 1900