CHAPTER 4
Frequency Programming
GENERAL INFORMATION
Frequency programming for the SP-605H
is accomplished by the proper installation of diodes on the
diode-matrix board, located in the back of the uniL. Each unit is shipped with a sufficient supply of diodes
to program all six channels.
In addition to diode programming, each unit must have the proper ranging crystals installed. There are two
RX crystals (X103) and (X104), and one TX crystal (X102).
RANGING CRYSTAL SELECTION
The following chart provides the proper frequency for the RX and TX crystals:
Frequency Band
RX
TX
(MHz)
(X103
&
X104)
(X102)
135-140
24.75
30.10
140-145
26.00
31.35
145-150
27.25
32.60
150-155
28.50
33.85
155-160
29.75 .
35.10
160-165
31.00
36.35
165-170
32.25
37.60
170-175
33.50
38.85
153-158
29.25
34.6
Note: SP-605H
units are shipped from the factorywith
RX1 (X103) and RX2 (X104) installed per order,
if specified. Should ranging changes be necessary, the above values should be installed according to the
desired frequency ranges. To order additional crystals, specify the desired frequency from the above charto
DIODE-MATRIX PROGRAMMING
Programming the desired frequency requires installation of diodes in the proper positions on the matrix
board (Iocated at the back of the unit). Matrix sections A through L correspond to the following channels:
Section A
RX Channel1
Section G
=
RX Channel 1
Section B
RX Channel2
Section H
RX Channel2
Section C
RX Channel3
Section i
RX Channel3
Section D
RX Channel4
Section
J
RX Channel4
Section E
RX Channel 5
Section K
RX Channel 5
Section F
RX Channel6
Section L
RX Channel6
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