System Manual

GuidePort: System Manual 27. November 2000 Seite 18
2.4.2 Technical Data
Transmission frequency f 127 kHz
Modulation type 2 - FSK
FM deviation 4 kHz
Data rate 8 kbit/s
Maximum transmission range with
internal antenna
3 m (isotropic pattern)
Maximum area covered by external
induction loop
9sq.m.
Power supply*
External DC
4 AA-size batteries
7.5–15
1.5
V
V
external power supply
inserted into identifier
Operating time with batteries
≥
3 months
P
out
= 100%,
T
on
= 8h/day
T
period
=1s
Programmable parameters ID code, RF output power, on/off
times, int./ext. antenna, burst rate
Setting of ID parameters via infrared data interface (IrDa)
with palmtop
Indoor operating temperature +10.........+50 °C
* N.B.: When the identifier is powered by an external DC supply, the battery supply will
be automatically cut off. We would recommend to use both external DC and batteries,
as this ensures that (a) no data will get lost in case of a mains power failure; (b) you
can conveniently program the battery-powered identifiers before they are mounted in
their final position and connected to an external DC supply.