PacComm TINY-2 - System Health and Clock Operations

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OPERATING

INSTRUCTIONS

Clock

Operations

eTXQOVELW:

‘Transmit

Queue

Overflow.

Counts

how

many

times

frames

were

discarded

because

the

outgoing

frame

queue

was

too

small.

eTXTMO:

Transmitter

Timeouts.

Counts

the

number

of

HDLC

transmit-

ter

timeouts.

Clock

Operations

nnn

The

packet

controller

clock

is

maintained

in

software

by

the

Z-80

microprocessor.

You

enable

the

packet

controller’s

real-time

clock

by

setting

the

date

and

time

with

the

command

DAytime.

Once

you

have

set

the

clock,

you

request

the

time

by

entering

DAytime

with

no

parameters.

The

date

and

time

will

be

lost

each

time

the

packet

controller

is

powered

off.

The

command

CLKadj

is

used

to

*tweak’

the

software

clock

toward

better

accuracy.

If

the

clock

loses

time,

increase

the

value

of

the

CLKadj

parameter,

n.

Large

values

have

a

small

effect

on

the

time,

while

small

values

of

n

have

a

large

effect

on

the

time.

Since

the

clock

accuracy

varies

with

the

amount

of

activity

on

the

radio

channel,

it

may

be

impossible

to

get

complete

clock

accuracy.

‘NOTE:

Some

PacComm

packet

controllers

have

an

‘optional

hardware

clock

which

retains

the

date

and

tim

‘even

if

the

packet

controller

is

powered

off.

The

format

of

date

and

time

display

is

controlled

by

the

com-

mands

DAYusa

and

AMonth,

DAYusa

allows

selection

of

a

US

or

European

date

format

and

AMonth

allows

selection

of

al-

phabetic

or

numeric

month

format.

The

AMonth

command

does

not

affect

the

date

format

of

the

Personal

Message

System.

Time

Stamping

Monitored

|

packets

can

be

time-stamped

if

Daytime

has

been

set.

To

enable

this

function,

set

MStamp

ON.

You

can

also

time-stamp

connect

and

disconnect

messages

with

the

com-

mand

CONStamp

ON.

Special

Operations

If

you

are

operating

a

full-duplex

radio

station

(simultaneous

transmit

an

receive),

you

should

set

FUlldup

ON.

The

packet

controller

is

always

electrically

capable

of

full

duplex

operation,

but

this

parameter

causes

the

packet

controller

will

ignore

carrier

detect

status.

Operating

Manual,

4th

Ed.

©

PacComm,

1990

31

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