Specifications

8-1
Chapter 8 - Remote Base Interface
Remote Base Transceiver With RBI-1 Interface
In this mode the CAT-1000B supports the Doug Hall RBI-1 Interface. The RBI-1 receives
serial data and clock information from the CAT-1000B and converts it to the format
required to control the Kenwood transceivers. All connections to the transceivers are
made through the mic jack. In addition to band, frequency, offset and transmitter
power, CTCSS tones can be selected remotely. By using the RBI-1 "GENERIC FORMAT"
future enhancements will include squelch adjustments and audio level control. The
RBI-1 supports the following Kenwood Transceivers:
140 MHz 220 MHz 440 MHz 1200 MHz DUAL BAND
TM-221 TM-321 TM-421 TM-521 TM-621 TM-731
TM-231 TM-331 TM-431 TM-531 TM-631 TM-701
TM-241 TM-441 TM-541 TM-721
Configure the CAT-1000B for RBI-1 operation by setting dipswitch #4 and #5 to on.
Zone 6 channels 1 and 2 must be on and the link must be enabled with the [5001]
command. The RBI-1 also has eight expanded user function switches. These switches
are controlled by the CAT-1000B using the control commands normally reserved for the
User function switches on the MF-1000 Serial Interface card.
Read Remote Base Frequency
To read the transceiver frequency, key-up and enter the Remote Base Frequency Load
prefix number followed by a 0. Un-key and the voice will read back the current
frequency including the offset. Example: With a prefix number of 525, read the
transceiver frequency.
Key-up and enter: 5 2 5 0
└─┼─┘ └──── Request Transceiver Frequency Read Back
└──────── Remote Base load prefix.
Load Remote Base Frequency
To load a transceiver frequency, key-up and enter the Remote Base Frequency Load
prefix, followed by the band, frequency, and offset. Example: With a prefix of 525,
load 146.940 MHz, minus offset. The voice will say: "FREQUENCY-ONE-FORTY-SIX-POINT-
NINE-FOUR-ZERO-MINUS."
Key-up and enter: 5 2 5 2 6 9 4 0 1
Load Prefix────┴─┴─┘ │ │ │ │ │ └────── 1=Minus, 2=Simplex, 3=Plus
Frequency Band───────┘ │ │ │ └──────── Kilohertz 1's (0 or 5)
Megahertz 1'───────────┘ │ └────────── Kilohertz 10's
(Enter 0 for 28/52MHz) └──────────── Kilohertz 100's
To suppress the voice read-back add a [#] at the end of the entry.
Frequency Band Selection Table (RBI-1 V3.0 Software)
Band 0 430 Band 3 220 Band 6 1280 Band 9 1240 Band C 52
Band 1 1250 Band 4 440 Band 7 1290 Band A 420 Band * 28
Band 2 140 Band 5 1270 Band 8 1260 Band B 900 Band # 130