STM300C ENOCEAN, STM300C Datasheet - Page 35

• Manufacturer Part Number: STM300C
• Description: MODULE SOC RF TXRX W/8051 MCU
• Manufacturer: ENOCEAN
• Series: Scavengerr

Specifications of STM300C

• Frequency: 315MHz
• Data Rate - Maximum: 125kbps
• Modulation Or Protocol: ASK
• Applications: General Purpose
• Power - Output: 5dBm
• Sensitivity: -98dBm
• Voltage - Supply: *
• Current - Receiving: 33mA
• Current - Transmitting: 24mA
• Data Interface: PCB, Surface Mount
• Memory Size: 32kB Flash, 2kB RAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -25°C ~ 85°C
• Package / Case: Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 1084-1008-2; S3031-D300

USER MANUAL
STM 300 / STM 300C
3.9
The main factors that influence the system transmission range are type and location of the
antennas of the receiver and the transmitter, type of terrain and degree of obstruction of
the link path, sources of interference affecting the receiver, and “Dead” spots caused by
signal reflections from nearby conductive objects. Since the expected transmission range
strongly depends on this system conditions, range tests should categorically be performed
before notification of a particular range that will be attainable by a certain application.
The following figures for expected transmission range are considered by using a PTM, a
STM or a TCM radio transmitter device and the TCM radio receiver device with preinstalled
whip antenna and may be used as a rough guide only:
The angle at which the transmitted signal hits the wall is very important. The effective wall
thickness – and with it the signal attenuation – varies according to this angle. Signals
should be transmitted as directly as possible through the wall. Wall niches should be
avoided. Other factors restricting transmission range:
The distance between EnOcean receivers and other transmitting devices such as comput-
ers, audio and video equipment that also emit high-frequency signals should be at least 0.5
m
A summarized application note to determine the transmission range within buildings is
available as download from www.enocean.com.
© 2010 EnOcean | www.enocean.com
Line-of-sight connections: Typically 30 m range in corridors, up to 100 m in halls
Plasterboard walls / dry wood: Typically 30 m range, through max. 5 walls
Line-of-sight connections: Typically 30 m range in corridors, up to 100 m in halls
Ferroconcrete walls / ceilings: Typically 10 m range, through max. 1 ceiling
Fire-safety walls, elevator shafts, staircases and supply areas should be considered as
screening.
Switch mounted on metal surfaces (up to 30% loss of transmission range)
Hollow lightweight walls filled with insulating wool on metal foil
False ceilings with panels of metal or carbon fiber
Lead glass or glass with metal coating, steel furniture
Transmission range
V1.30
STM 300 / STM 300C User Manual V1.30 | Page 35/40