PacComm TINY-2 - Hardware Adjustments and Settings

ADJUSTMENTS
Trimpov/Varicap
Adjustments
ADJUSTMENTS
Jumper
Functions
The
following
table
lists
the
function
of
each
jumper
on
the
TINY-
2/MICRO-2
PC
board.
The
normal
(standard
jumper
setting)
positions
for each are shown.
JPB : Lithium Battery
« ON (normal) Lithium battery connected
+
OFF
Lithium
battery
disconnected
JP
D:
NET/ROM
+
RFDCD
+ N (normal) NET/ROM input to DCDB
+ RF RF Squelch to DCDB
JP L: Digital Loopback
+ N (normal) Normal Modem Operation
oL Digital loopback mode
JP
RA:
Audio
Input
Impedance
»
ON
(normal)
Speaker
audio
input
+
OFF
High
impedance
audio
input
JP
Aux:
Auxiliary
I/O
+ Auxiliary
/O
Jines
for
MICROPOWER-2
with
printer
option
JP
8:
Power
Connection
+ Auxiliary connection point for 12v and gnd for accessories
Trimpot/Varicap Adjustments
Most
of
the
following
adjustments
must
be
performed
with
the
TINY:
2/MICRO-2
removed
from
its
cabinet.
Rernove
the
packet
controle:
from
its
cabinet
by
removing
both
front
and
rear
end
plates
and
plastic
bezels.
Use
caution
not
to
damage
the
grounding
straps
attached
tc
some of the end plate screws.
* C17 -- CPU oscillator frequency
*R9_
--
Modem
bias
level
+ Rt2 -- Transmit output level
* R26 -- Modem carrier detect level
14 TINY-2/MICRO-2 Technical Ref., 2 Ed © 1989, PacComm, !nc.