Campbell SAT ARGOS Bedienungsanleitung Seite 95

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Seitenansicht 94
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048
Page 87
Echo Off
Normally, a modem echoes all commands it receives. for example, if you send the attention string AT to
a modem, it responds immediately with AT, so that you see the command as well as the response OK on
the screen. It is important to switch off the echo, to avoid indefinite communications loops such as those
discussed above.
Non-Volatile Memory
When you set up a modem configuration, typically the settings are held in working memory. When the
modem loses power, it reverts to its last saved configuration. Once you have the ZENO
®
-3200 and the
modem working well together, you should save both the ZENO
®
-3200 configuration
106
and the modem
configuration to non-volatile memory so that they will reboot correctly after a loss of power.
6.4.3. CABLE PIN-OUTS
The following schematics reveal which cables, provided by Coastal Environmental Systems, are required
to connect a ZENO
®
-3200 with a computer via a telephone modem. Please note: These cables are not
standard serial cables. Use only the cables provided by Coastal.
107
The first schematic illustrates a 25-pin to 9-pin cable. The second illustrates a 9-pin to 9-pin cable.
ZENO
®
-3200 to Modem: 25-pin (US Robotics)
ZENO COM3 DE-9F MODEM DB-25F
Shield
DCD 1 8 DCD
RXD 2 3 RXD
TXD 3 2 TXD
DTR 4 20 DTR
SG 5 7 SG
6
7 4 RTS
CTS 8 5 CTS
9 1 GND
Figure 6-4. 25-pin to 9-pin, modem-to- ZENO
®
-3200 cable.
ZENO®-3200 to Modem: 9-pin
106
Refer to Section 2.3.2.
107
For direct communication between a computer and a modem, use the cable provided by the modem
manufacturer.
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