A09-HSM-7 Digi International/Maxstream, A09-HSM-7 Datasheet - Page 28

• Manufacturer Part Number: A09-HSM-7
• Description: ANT 900MHZ 7" STRAIGHT W/RPSMA
• Manufacturer: Digi International/Maxstream

Specifications of A09-HSM-7

• Antenna Type: Whip: 1/2 Wave
• Number Of Bands: 1
• Frequency: 915MHz (902MHz ~ 928MHz)
• Vswr: 2
• Gain: 2dBi
• Termination: RP-SMA
• Mounting Type: Connector
• Height (max): 7.0" (177.8mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9XTend™ OEM RF Module ‐ Product Manual v2.x4x [2007.01.04]
HP (Hopping Channel) Command
HT (Time before Wake-up Initializer) Command
HV (Hardware Version) Command
ID (Modem VID) Command
<Networking & Security> The HP command is
used to set/read the RF module's hopping channel
number. A channel is one of three layers of filtra-
tion available to the module.
In order for modules to communicate with each
other, the modules must have the same channel
number since each channel uses a different hop-
ping sequence. Different channels can be used to
prevent modules in one network from listening to
transmissions of another.
<Sleep (Low Power)> The HT command is used
to set/read the time of inactivity (no serial or RF
data is sent or received) before a wake-up initial-
izer is sent by a TX (transmitting) RF module. The
HT parameter should be set shorter than inactiv-
ity timeout [ST Command] time of any RX
(receiving) modules operating in Cyclic Sleep
(SM=4-8). The wake-up initializer sent by the TX
module instructs all RX modules to remain awake
to receive RF data.
From the RX module perspective: After HT time
elapses and the inactivity timeout [ST Command]
is met, the RX module goes into cyclic sleep. In cyclic sleep, the RX module wakes once per sleep
interval [SM Command] to check for a wake-up initializer. When a wake-up initializer is detected,
the module stays awake to receive data. The wake-up initializer must be longer than the cyclic
sleep interval to ensure that sleeping modules detect incoming data.
When HT time elapses, the TX module knows it needs to send a wake-up Initializer for all RX mod-
ules to remain awake and receive the next transmission.
<Diagnostics> The HV command is used to read
the hardware version of the RF module.
<Networking & Security> The ID command is
used to set/read the VID (Vendor Identification
Number) of the RF module. RF modules must
have matching VIDs in order to communicate.
© 2007 MaxStream, Inc.
AT Command: ATHT
Binary Command: 0x03 (3 decimal)
Parameter Range: 0 - 0xFFFF
Default Parameter Value: 0xFFFF (wake-up
initializer will not be sent)
Number of bytes returned: 2
Related Commands: LH (Wake-up Initializer
Timer), SM (Sleep Mode), ST (Time before
Sleep)
AT Command: ATHV
Parameter Range: 0 - 0xFFFF [Read-only]
Minimum Firmware Version Required: v1.x80
AT Command: ATID
Binary Command: 0x27 (39 decimal)
Parameter Range:
Default Parameter Value: 0x3332 (13106d)
Number of bytes returned: 2
AT Command: ATHP
Binary Command: 0x11 (17 decimal)
Parameter Range: 0 - 9
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: ID (Modem VID), DT
(Destination Address), MK (Address Mask)
0x11 - 0x7FFF (user-settable)
0 - 0x10 & 0x8000 - 0xFFFF (factory-set)
Chapter 3 ‐ RF Module Configuration
[x 100 milliseconds]
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