Tone; Trace - Advanced Electronic Applications PK-88 Operating Manual

PK-88 OPERATING MANUAL
At transmit time, the PK-88 reads the embedded control code (default [^T]), reads the time of day
from the PK-88's internal clock and then sends the time to the radio in the data transmission code
in use at that time.
When DAYSTAMP is set ON, the date is transmitted with the time.
NOTE: The TIME command cannot be embedded in CTEXT or BTEXT.
n

TONE

n
Parameters:
The TONE command sets the AM7910 Modem chip's send and receive tones and shift. Two sets of
different modem tone combinations are available:
TONE
0
1
2
3
TONE 3 provides a significant degree of frequency response equalization in the modem receiver.
TONE 3 may be beneficial when working with radio receivers whose high frequency audio response
is less than adequate.
In general practice, use Bell 103 tones at the lower data rates for HF radio, and Bell 202 tones for
higher data rates authorized above 28 MHz in many countries.
Note that the PK-88 is shipped strapped for the Bell standard tones used in North America.
TRACE ON|OFF
Parameters: ON
OFF
The TRACE command activates the AX.25 protocol display. If TRACE is ON, all received frames are
displayed in their entirety, including all header information.
NOTE: Be careful using the mnemonic - don't use TRA! The PK-88 will change to Transpa-
rent Mode!
The TRACE display is shown as it appears on an 80-column display. The following monitored frame
is a sample:
W2JUP*>TESTER <UI>:
This is a test message packet.
Byte
000: A88AA6A8 8AA460AE 6494AAA0 406103F0
010: 54686973 20697320 61207465 7374206D
020: 65737361 67652070 61636B65 742E0D
The byte column shows the offset into the packet of the beginning byte of the line.
Mnemonic: TO
0 to 3 specifies an ASCII transmit and receive modem tones.
Specification Stop / Mark Start / Space Type of Service
Bell 103 Originate
Bell 103 Answer
Bell 202
Bell 202 Equalized
Mnemonic: TRAC
Trace function is activated
Trace function is disabled.
Hex
Default: 3 (BELL 202)
1070 Hz 1270 Hz
2025 Hz 2225 Hz
1200 Hz 2200 Hz
1200 Hz 2200 Hz
Default: OFF
Shifted ASCII
TESTER0W2JUP 0.x ......`.d...@a..
*449.49.0.:29:.6 This is a test m
299032.80152:..
5 - 62
COMMAND SUMMARY
HF 300 baud
HF 300 baud
VHF 1200 baud
VHF 1200 baud
ASCII
essage packet...
PK-88 - 137