CEP HT63 E Руководство пользователя - Страница 11

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Frequency range
Bandwidth
Gain
Impedance
Input power
VSWR recommended

2.3 SIM card reader

The HT63-E Terminal is fitted with a SIM card reader designed for 1.8V and for 3V SIM cards.
It is the flip-up type which is lockable in the horizontal position and is accessed through a
removable panel.

2.4 RS232 Serial Port

The modem supports a standard RS232 serial interface via its 9 pin Sub-D connector, shown
below. In line with serial communication terminology the HT63-E Terminal should be
considered as the data circuit-terminating equipment (DCE) and the external application or
computer as the data terminating equipment (DTE). The maximum baud rate to communicate
with the HT63-ETerminal is 230400 kbit/ s.
The electrical characteristics of the serial port signals are shown below:
PIN
1
2
3
4
5
6
7
8
9
Table 3: Recommended antenna parameters
Signal
Direction
DCD
Output
RD
Output
TD
Input
DTR
Input
GND
-
DSR
Output
RTS
Input
CTS
Output
RI
Output
Table 4: Electrical characteristics of the serial port signals
GSM 850/900 MHz
GSM 1800/1900 MHz
80 MHz in EGSM 900, 70 MHz if GSM
850,
< 3dBi
50 ohm
> 33dBm (2W) peak power in GSM
< 2
Voltage levels
> + 4V
<- 4 V
> + 4V
<- 4 V
> + 2,4V
< 0.8 V
> + 4V
< 0.8 V
0 V
> + 4V
< - 4 V
> + 2,4V
< 0.8 V
> + 4V
< - 4 V
> + 4V
< - 4 V
11
Description
Data carrier detect
Received data
Transmitted data
Data
terminal
ready
Ground connection
Data set ready
Request to send
Clear to send
Ring indicator