User manual

MTX-HSPA-PH8-P+G UMTS-HSPA terminal modem http://www.matrix.es
MTX-HSPA-PH8-P+G User Manual V.1.0 Pag. 22
Preliminary. Subject to change without prior notice
4. OPERATION
4.1 Switching On the Modem
There is ONE way to switch on the modem once the power is applied:
• assert TURN_ON high for > 0.4s;
The modem is fully operational after 4 seconds. Logging onto a network may take longer than this and is
outside the control of the modem.
The modem can be configured to start up at the time power is applied by permanently tying power
connector signals TURN_ON (pin 4) and VCC (pin 1) together.
4.2 Switching Off the Modem
There are 2 ways to switch off (power down) the modem as described below:
• Either use the AT^SMSO command; RECOMMENDED.
The AT^SMSO command lets the MTX-HSPA-PH8-P+G Terminal log off from the network and allows the
software to enter into a secure state and save data before disconnecting the power supply. The mode is
referred to Power-down mode. In this mode only the RTC stays active.
• Or assert TURN_OFF, pin 3 of power supply connector, high for >1 seconds. A delay of up to 10s is
experienced as the modem logs off the network.
Standardversionhas“autopoweronaftershutdown”featurewhichmeansitcannotbeswitchedoff,itis
permanentlyworking100%ofthetimeanditswitchesonautomaticallyevenifit’sforcedtobeoff.

STANDARD
1. MTX‐HSPA‐PH8standardversion.NoPCBchanges
a. PoweratPIN1(VCC)
&PIN6(GND)
 ModemswitchesON.
 WhentryingtoturnitoffusingtheAT^SMSOcommandorafter–long‐pulseatPIN3,the
modemgoestoswitchonagainautomatically.
 ModemisswtichedoffeverytimepositivepowerisappliedatPIN3.
b. Powerpositiveat
PIN1+4,GNDpin6,asmanypowersuppliesisconfigured:
 ModemswitchesON.
 WhenyoutrytoturnitoffusingtheAT^SMSOcommandorafter–long‐pulseatPIN3,
themodemgoestoswitchonagainautomatically.
 Modemisswitchedoffeverytimepositivepower
isappliedatPIN3.

ThereisaCUSTOMversion(MOQisapplied)
1. MTX‐PH8PCBresistorschange
a. PoweratPIN1(VCC)&PIN6(GND)
i. ModemdoesNOTswitchON.
1. Toswitchon,apulseorpositivelevelisneededinPIN4.
2. Toswitch
off,anAT^SMSOcommandoralarge,positive(>2sec)pulseat
PIN3isneeded
3. ToswitchonAGAIN,youneedapulseorpositivelevelinpulse4.
b. PowerpositivelevelPIN1andPIN4.GNDpin6.Likeourpowersupply.
i. ModemwillswitchONwhenplugging.

1. Toswitchoff,anAT^SMSOcommandoralargepositive(>2sec)pulseat
PIN3needed
2. ToswitchonAGAIN,unplugandplugin thesupplyagain.
