User's Manual

Axentia Technologies 1-B iBus EPM-1000 wireless push button User Manual v2.0.docx
Page 3 (4)
3 Technical specification for the EPM-1000
Manufacturer: Axentia Technologies AB
Universitetsvägen 14
583 30 Linköping, Sweden
www.axentia.se
[phone]
Product name: iBus wireless push button (EPM-1000)
Product type: Wireless push button for TTS
UHF ISM Radio:
The UHF ISM radio is used for wireless communication with a wireless push button (info button).
The wireless push button is optionally used for triggering of the Text-To-Speech functionality.
Modulation: FSK (Frequency-shift keying), Δf = 150 kHz, data rate 25 kbit/s
Frequency Range/Band: 915 ism band. ITU Region 2 frequency range 902 – 928 MHz. Nominal
center frequency f
c
= 915 MHz
𝑓 = 𝑓
𝑐
± ∆𝑓 = 915 𝑀𝐻𝑧 ± 150 𝑘𝐻𝑧
The center frequency f
c
is static. It can be changed, but only by uploading new software (in
production / production testing, before assembly).
Transmission power: Below 10 mW
Antenna gain: EIRP approx. -2 dBm
Antenna type: Single F-antenna, gain approx 0 dBi. Non-detachable antenna (integrated on pcb).
Operation mode: Non-adaptive mode only
Tranceiver circuit : Semtech SX1211
Power: Primary Lithium Thionyl Chloride, 3.6 V, 8500 mAh (c.f. “MINAMOTO Push button
battery spec.pdf”)