Campbell Scientific RF300-Series DRL VHF/UHF Radio Transceivers - Manual (Page 49)

F-1
APPENDIX F. EQUIPMENT COMPATIBILITY
F.1 COMPATIBILITY OF CURRENT AND
PAST RF EQUIPMENT
This section is to aid customers who have older
RF equipment from Campbell Scientific. Table
F-1 lists the different components of past and
current RF systems.
TABLE F-1. Different RF Setups
Oldest Obs. 2nd Obs. 3rd Obs.
RF Setup RF Setup RF Setup
Radios HT90/ P50 RF100
HT90-SDC RF200
RF Modem DC95 RF95 RF95
Base Station PS232 RF232
A site of one setup will communicate with a site
of another setup as long as the following
conditions are met:
•
Both radios are set to the same frequency.
•
Both antennas are oriented to receive from
the other.
•
Both sites are line-of-site of each other.
•
Both sites are close enough together for the
signal to transmit.
There are a few basic rules to remember when
interfacing equipment of different setups at the
same site.
1. An RF95 is a direct replacement for a DC95
when used with a 21X or CR7.
2. The RF95 Modem will work with the HT90,
P50, RF100, and RF200 radios.
3. The DC95 Modem will not work with the
P50, RF100, or RF200 radios.
4. Each Base Station will only physically hold
the RF Modem from the same RF Setup.
That is, a PS232 holds a DC95 and an
RF232 holds an RF95.
5. When replacing an HT90-SDC radio, the
CR10 must have current software PROMs.
6. A CR10 with old software can be used with
an RF95 in the ME State, however the
datalogger loses the "callback" capability as
well as the SDC function.
F.2 THE "U" COMMAND
The "U" command, or Old Link command, is
only needed if a DC95 with PROM 399B or
399D is being utilized at a field or repeater
station and a newer DC95 PROM or an RF95 is
used at the base station.
When a remote station with an RF95 (or newer
DC95 PROM) is interrogated by a base station
with the older DC95 PROM at the 2400 baud
rate, the remote station detects the 2400 baud
rate and automatically communicates at that
baud rate.
When the base station modem is changed to an
RF95 (or newer DC95 PROM) and there are still
old DC95s in some of the remote stations, then
the "U" command must be used to
communicate with those stations.
The DC95 PROM numbers 399B and 399D are
2400 baud, PROM 589-1 in the DC95 enables
3000 baud. The PROM number is written on
the top of the PROM which is located to the left
of the ID switch under the cover of the DC95.
DC95s with the 2400 baud PROMs can be used
only at 2400 baud. The "U" command
preceding the setup string will force
communication at 2400 baud. The "S"
command precedes the U command when used
with the Terminal Emulator. TELCOM and
TERM otherwise add the "S" command
automatically. Example F-1 shows the use of
the "U" command in a setup block. The default,
without a "U" command, is 3000 baud.
Alternatively, DC95s can be updated with
PROM 589-1 to communicate at 3000 baud.
EXAMPLE F-1. Use of the "U" Command
Path: U5 10 12 7