PK-232 – MBX OPERATING MANUAL COMMAND SUMMARY
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SIgnal Immediate Command
Mode: All Host: SI
SIGNAL is an immediate command that causes the PK-232 to enter the Signal Identification and
Acquisition Mode (SIAM). The PK-232 will respond with:
Opmode was BAudot
Opmode now SIgnal
After a few seconds the PK-232 will show the signals baud rate. A few seconds later it will identify
the signal type.
SLottime "n" Default: 30 (300 msec.)
Mode: Packet Host: SL
Parameters: "n" - 0 to 250 specifies the time the PK-232 waits between generating random
numbers to see if it can transmit.
The SLOTTIME parameter works with the PPERSIST and PERSIST parameters to achieve true p-
persistent CSMA (Carrier-Sense Multiple Access) in Packet operation.
SQuelch ON|OFF Default: OFF
Mode: Packet Host: SQ
Parameters: ON - Your PK-232 responds to positive-going squelch voltage.
OFF - Your PK-232 responds to negative-going squelch voltage.
Normally, your PK-232 uses its CSMA (Carrier Sense Multiple Access) circuit to decide whether or
not it is clear to transmit on a packet channel. If there are non-packet signals on the channel
you're using (such as voice), you will want to use true RF-carrier CSMA by monitoring the squelch
line voltage from your radio.
If SQUELCH is OFF (default) the PK-232 inhibits transmissions when there is a POSITIVE voltage
on the Radio connectors squelch input line. When there is no voltage or NO CONNECTION to this
pin, the PK-232 allows packets to be sent.
When SQUELCH is ON, the PK-232 will inhibit packet transmissions when there is 0 volts applied to
the squelch input pin on the Radio connector.
SRXall ON|OFF Default: OFF
Mode: AMTOR Host: SR
Parameters: ON - Receive ALL selective (SELFEC) transmissions.
OFF - Receive only SELCALL-addressed SELFEC transmissions.
SRXALL permits the reception of selectively coded inverse FEC signals normally not available for
decoding. Set SRXALL ON to activate this feature.
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