PK-88 OPERATING MANUAL
COMMAND SUMMARY
5 - 62
PK-88 - 137
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.
TONE
n
Mnemonic:
TO
Default: 3 (BELL 202)
Parameters:
n
0 to 3 specifies an ASCII transmit and receive modem tones.
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
Specification
Stop / Mark Start / Space Type of Service
0
1
2
3
Bell 103 Originate
Bell 103 Answer
Bell 202
Bell 202 Equalized
1070 Hz
2025 Hz
1200 Hz
1200 Hz
1270 Hz
2225 Hz
2200 Hz
2200 Hz
HF 300 baud
HF 300 baud
VHF 1200 baud
VHF 1200 baud
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
Mnemonic:
TRAC
Default: OFF
Parameters:
ON
Trace function is activated
OFF
Trace function is disabled.
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
Hex
Shifted ASCII
ASCII
000: A88AA6A8 8AA460AE 6494AAA0 406103F0 TESTER0W2JUP 0.x ......`.d...@a..
010: 54686973 20697320 61207465 7374206D *449.49.0.:29:.6 This is a test m
020: 65737361 67652070 61636B65 742E0D
299032.80152:.. essage packet...
The byte column shows the offset into the packet of the beginning byte of the line.
