User's Manual

Vectron User manual
© Höft & Wessel AG
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Subject to amendment, errors excepted HW8660UserMan.doc 1.0 02.02.2001 Lin
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10.3.3 Product HW 8660/US
The product HW 8660/US is a radio base station operating in the 2400 – 2483.5 MHz band. It includes a
general purpose microcomputer which serves external interfaces such as Ethernet, RS-232 and Cen-
tronics.
The product is connected to the AC power lines through an external AC adaptor.
Radio frequency is used for transmission of digital information between the product and other devices
supporting the same radio standard. The radio frequency transmission and reception is provided by an
encapsulated transceiver module HW 86020.
The product either contains one or two of these modules depending on the required number of simulta-
neous radio connections.
The antennas are permanently attached to the transceiver modules inside the housing of the product.
There is no provision for connecting external antennas or amplifiers.
10.4 Radio frequency transmission
The entire radio function is encapsulated in a module of type HW 86020, in the following referred to as
transceiver. It comprises RF as well as baseband signal processing.
10.4.1 Frequency channels
The transceiver uses the frequency band 2400 – 2483.5 MHz. Within this band it operates on 48 fre-
quency channels. Table 1 lists the center frequencies. The channel spacing equals 1.626353 MHz, the
channel bandwidth equals 1.6 MHz, i.e. the frequency channels are not overlapping.
Ch # Frequency [MHz] CH# Frequency [MHz]
0 2403,749647 24 2442,782118
1 2405,376000 25 2444,408471
2 2407,002353 26 2446,034824
3 2408,628706 27 2447,661176
4 2410,255059 28 2449,287529
5 2411,881412 29 2450,913882
6 2413,507765 30 2452,540235
7 2415,134118 31 2454,166588
8 2416,760471 32 2455,792941
9 2418,386824 33 2457,419294
10 2420,013176 34 2459,045647
11 2421,639529 35 2460,672000
12 2423,265882 36 2462,298353
13 2424,892235 37 2463,924706
14 2426,518588 38 2465,551059
15 2428,144941 39 2467,177412
16 2429,771294 40 2468,803765
17 2431,397647 41 2470,430118
18 2433,024000 42 2472,056471
19 2434,650353 43 2473,682824
20 2436,276706 44 2475,309176
21 2437,903059 45 2476,935529
22 2439,529412 46 2478,561882
23 2441,155765 47 2480,188235
Table 1: Center frequencies of the used frequency channels