Paclen; Pactime - Advanced Electronic Applications PK-88 Operating Manual

PK-88 OPERATING MANUAL
n

PACLEN

n
Parameters:
0
PACLEN sets the maximum number of user data bytes to be carried in each packet's 'information
field'. 'User data' means the characters you actually type at your keyboard (or send from a stored
file).
The PK-88 automatically transmits a packet when the number of characters you type (or send from
disk) for a packet equals
Most keyboard-to-keyboard operators use the default value of 128 bytes for routine VHF/UHF
Packet services.
Experiment with different values for MAXFRAME and PACLEN to find the combination best suited to
your operating conditions – especially if you are transferring files.
The lower the value of PACLEN, the greater the probability of getting packets though the link
without 'hits' or retries.
Increase PACLEN to 256 byes (set 0) if transferring files to a nearby station over a high quality
path.
Reduce PACLEN to 64, or even 32 when working 'difficult' HF radio paths.
If the radio link is good, an optimal relationship will exist between the parameters set by these
commands. Set PACLEN so that the maximum number of characters outstanding doesn't ex-
ceed the receive buffer space of the TNC receiving the data.
It is not necessary that two TNCs be set to the same PACLEN value to exchange data; however,
some TNCs may not be compatible when frames contain more than 128 data characters.
NOTE: The FRACK counter begins counting from the first flag of each frame. If MAXFRAME
is set to 7 and PACLEN is set to maximum (0), FRACK should be lengthened to pre-
vent the distant station's ACK from colliding with your possibly-premature retry.
PACTIME EVERY|AFTER
n
Parameters:
EVERY Packet timeout occurs every
AFTER Packet timeout occurs when
A PACTIME parameter is always used in Transparent Mode. PACTIME is also used in Converse
Mode if CPACTIME is ON.
When EVERY is specified, the characters you type or send from disk are packaged and queued
for transmission every
When AFTER is specified, the characters you type or send from disk are packaged when input
from the terminal stops for
A zero-length packet will never be produced. The timer is not started until the first character or
byte is entered.
A value of 0 (zero) for
Mnemonic: PACL
0 to 255 specifies the maximum length of the data portion of a packet.
Zero is equivalent to 256.
n
. This value is used in both Converse and Transparent Modes.
n
Mnemonic: PACT
0 to 250 specifies 100-millisecond intervals.
from the computer or terminal.
n
times 100 milliseconds.
n
times 100 milliseconds.
n is allowed; zero means packets are sent with no wait time.
Default: 128
Default: AFTER 10
n
times 100 milliseconds.
n time 100 milliseconds elapse without input
5 - 54
COMMAND SUMMARY
PK-88 - 129