© Microhard Systems Inc.
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SUPPLY / REGULATOR
POWER
PA
UART
(DCE)
EEPROM
SRAM
uC
A/D
DATA BUS
MIXER
GAIN
FREQUENCY
SYNTHESIZER
DIGITIZER
IF
DEMOD
ANTENNA
SWITCH
MIXER
LNA
TxD
RTS
DTR
DSR
CTS
RxD
DCD
RSSSI1-3
RXMODE
TXMODE
(LEDS)
(LED)
(LED)
XTAL
Diag RxD
Diag TxD
!ShutDown
!Bootpgm_Mode
!Config
!WAKEUP_usr
VClock
!Reset
(LED)
USR_1
(LED)
USR_2
(LED)
USR_3
3.0 Hardware Description
3.1 Nano Series OEM Module
The Nano Series Modems are available in both OEM and Enclosed packages. The OEM version supplies all
the required raw signals to allow the unit to be tightly integrated into applications to efficiently maximize space
and power requirements. The Enclosed version of the Nano Series modem allows for a fully operational table
top or mountable solution. The various interface cards and development boards can provide a convenient
evaluation platform or an in between end solution.
The Nano Series OEM module is typically complemented by interface circuitry (e.g. power, data interface) for
most applications. The Nano Interface Card, MHX Development Board (used with Nano Interface Card) and
Nano Motherboard provide much of this interface circuitry to aid in the integration or evaluation of the Nano
Series module.
The Nano Enclosed Modem supplies all required interface circuitry and all that is required are general user
interfaces (RS232, antenna, power).
Any Nano Series module may be configured as a Master, Repeater (or Repeater/Slave), or Slave.
This versatility is very convenient from a ’sparing’ perspective, as well for convenience in becoming familiar
and proficient with using the module: if you are familiar with one unit, you will be familiar with all units.
Drawing 3-1: Nano Series Functional Block Diagram
Image 3-1: Nano n920 OEM Bottom View
Image 3-2: Nano n2420 OEM Bottom View