Specifications

54
88..99 IINNFFOORRMMAATTIIOONN RREEAADD
The data sensors are interfaced with the CPU through input ports PA3 through
PA7. After an IRQ, the tune algorithm program can access any desired vari-
able by simply searching for the desired input port (lacking any applicable
pre-stored data). Since the comparators effectively preprocess the desired
data, to read any specific variable, the CPU need only look at the required port
for the desired variable.
88..1100 BByyppaassss OOppeerraattiioonn JJuummppeerrss
If broadband operation is required during receive for scan operation, jumper
JP2 may be set to the Ò
YY EE SS
Ó position. This will drop the tuning elements out of
the circuit on receive only. Jumper JP2 is located on the far left side of the
Q50102501 printed circuit board. (If you open your Smartuner to access this
jumper, please use caution to ensure that the waterproof seal is carefully
placed prior to refitting the coupler cover.)
¥ Setting JP2 to the Ò
YY EE SS
Ó position is recommended if you are using a radio for
split band communications, for scanning selective calling protocols, or for
ALE (Auto-matic Link Establishment).
The default is: Tuning Out In Rcv:
[[nn oo ]]
.
¥ Jumper JP1 set to Ò
NNoo
Ó bypasses the couplerÕs memories. This means that
each time the coupler is used on a different frequency, it will retune rather
than use previously stored information.
The default is Tune From Memory:
[[ ÒÒ YY ee ss ÓÓ ]]
.
¥ Jumper JP3. Set to ÒYes,Ó JP3 keeps the 500-watt amplifier in the transmit
mode as long as the PTT signal from the radio is asserted and whether or not RF
power is applied to the coupler. Set to Ò
NNoo
,Ó JP3 keeps the 500-watt amplifier
in the transmit mode as long as RF power is applied to the coupler.
The default is PTT control:
[[ ÒÒ YY ee ss ÓÓ ]]
.
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USA
P.O. Box 3526, 98009 Fax: [phone] Tel: [phone] or 1-800-259 7331
E-mail: [e-mail] Web site: http://www.sgcworld.com
© 1998 SGC Inc
SG-235 Manual