Stage 2 of Tuning Procedure
Determining Antenna Resistance (
LOCAL
control,
TUNE SETUP
on)
ATU-HP Technical Instruction Manual
Page 2-15
Section 2 Preparation for Use and Installation
Issue 2.0
Figure 2-8 - Flow Diagram – Determining Antenna Resistance
Note reflected power level
on meter
Which
R
TUNING
LED is on?
Note reflected power level
on meter
Turn transmitter off.
Change taps on T1 to
next lower antenna
resistance as per
Table
2-3
Turn transmitter off.
Change taps on T1 to
next higher antenna
resistance as per
Table
2-3
.
Turn transmitter on
Wait for
L
NORMAL
LED to
turn on (motor
stops)
DETERMINE ANTENNA
RESISTANCE
If a
DECREASE
adjustment has already
been made, discontinue
loop and proceed as if
NORMAL
If an
INCREASE,
adjustment has already
been made, discontinue
loop and proceed as if
NORMAL
ANTENNA RESISTANCE
DETERMINED
L TUNING R TUNING
MAX LIMIT
INCREASE
NORMAL
DECREASE
MIN LIMIT
INHIBIT
L TUNING R TUNING
MAX LIMIT
INCREASE
NORMAL
DECREASE
MIN LIMIT
INHIBIT
L TUNING R TUNING
MAX LIMIT
INCREASE
NORMAL
DECREASE
MIN LIMIT
INHIBIT
