6
AP Series
Instruction Manual
Setting The Unit Input/Output Channel
Gently pull both access door retaining clips simultaneously to expose the offset channel selector switches.
Two banks of switches are presented. Switch 1 has 4 positions and Switch 2 has 8 positions. Position 1, 2 & 3 of Switch
1 are used to set the unit operating mode as shown in the Switch 1 table. Position 4 is used to invoke (UP) or revoke
(DOWN) the FCC Aeronautical Frequency Offsets.
1 2 3 4
SWITCH 1
STD
IRC
HRC
Broadcast
Sub Band
(optional)
1 2 3 4
SWITCH 1
STD
IRC
HRC
Broadcast
Switch 2 is used to set the unit input/output channel number.
Channel setting is accomplished by setting the switch to the desired input/output chan-
nel.
Switch 2 is divided into 2 sections, the Tens section and the Ones section.
In each section, there are 4 switches labeled - 8,4,2,1. Each correspond to it’s respective
numeric value.
A simple chart, shown below, gives the corresponding switch positions for Tens position,
1 to 12 and for the Ones position 0-9.
The user sets the Tens section and the Ones section together to set the desired channel.
The artithmetic sum of the values of both the Tens section and the Ones section is equal
to the channel number to which the unit is set.
Example: For CH 116, set 11 Tens and 6 ones for 116.
For single digit channels, the Tens switch is set to zero.
= 0
= 2
= 3
= 4
= 1
= 5
= 6
= 7
= 8
= 9
SWITCH 2
8 4 2 1
Ones
Tens
Tens
Value
Switch 2
Numeric Value Chart
Ones
Value
8 4 2 1
0 =
20 =
30 =
40 =
10 =
50 =
60 =
70 =
80 =
90 =
100 =
110 =
120 =
Channel Setting Examples
= CH 2
= CH 58
= CH 87
= CH 116
1 2 3 4
SWITCH 1
STD
IRC
HRC
Broadcast
Sub Band
(optional)
INVOKED
REVOKED
INVOKED
REVOKED
Output
Input
