Scan Operation - Ten-Tec RX-340 Technical Manual

equipment for additional signal processing. Signal quality between the RX-340 and
external devices is maintained since D/A and A/D stages are eliminated. In addition, the
data streams may be turned ON or OFF as needed by remote command. Because the RX-
340 provides both audio and IF outputs, the data streams to have control signals
associated with them. Also, because the serial and parallel interfaces are implemented
differently, the control signals associated with each are different.
The Serial Interface provides Serial Clock, Serial Data and Frame Start signals. The
Serial Data output provides a 14-bit signed sample. Additional control signals are
provided to indicate the origin of the sample. The IF/AF line indicates if a sample is IF
Data or AF Data. The 'U/L' line indicates if the AF sample is from the Upper or Lower
Sideband. In all receiver modes, except ISB, the Upper and Lower samples are the same.
When in ISB mode, the Upper and Lower samples are selected by remote commands.
The Parallel Data stream consists of a 14-bit signed sample embedded in a 16-bit word,
with the Upper two bits providing additional information about the sample. These two
bits are encoded to indicate the origin of the sample. Bit 15 indicates if the sample is an
IF or AF sample. If bit 15 indicates an AF sample, bit 14 will indicate either a Upper or
Lower sample. In all modes except ISB, the Upper and Lower samples are the same.
When in ISB mode, Upper and Lower samples may be controlled by remote commands.
Also the control bits (bit 14 and bit 15) can be turned OFF (or forced to logic 0) by
remote command.

5-9 SCAN OPERATION:

The RX-340 provides two scanning modes (Refer to Chapter 4 for a complete
explanation of all scan functions). Briefly, channel scanning, called MScan, allows the
radio to search for activity on pre-programmed memory channels. F1-F2 scanning, called
PScan allows the radio to search for activity in a given frequency range. Commands are
provided for setting the various parameters for each of the scanning modes. Time
controls are common to both scanning modes. Frequency data is entered in MHz and
must fall within the radio's 0-30 MHz range. The allowable range for time data is 0 to
99.99 seconds. Allowable channel numbers and lockout numbers are 1-100. 100
Lockouts and 100 Memory channels are provided.
A. To Configure Program-Scan; ft to 12 with lockouts.
*C0ff.ffffff PScan entry of Starting Frequency in MHz (*C012.250000 for 12.250 MHz).
*C1ff.ffffff PScan entry of Ending Frequency in MHz (*C113.250000 for 13.250 MHz).
*C2ff.ffffff PScan entry of Step Size in MHz, (example: *C200.010000 for 10 kHz).
*CAff.ffffff Add Lockout at specified frequency in MHz. (*CA12.000000 for 12 MHz).
*CDff.ffffff Delete Lockout at specified frequency in MHz (*CD12.000000 for 12 MHz).
*CBff.ffffff– Add Lockout Range of F1-F2 (*CB12.000000-12.500000 for 12-12.5 MHz).
ff.ffffff
*CNnnn Delete Lockout by Number. Use *TA to get lockout list. (*CN021 for #21)
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