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VVJ-O < 1 0 - 1 3 / r li
111"
i\L,V^L.l»L.U
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6.
Using the Digital Voltmeter or oscilloscope,
the IF
Interface select outputs using the following table.
The
levels on
the pins are to bet observed when the
detection mode or bandwidth is selected as indicated in
the table.
If a faulty signal is encountered, replace the
IC
associated
with
that
function
as
indicated
in
the
table.
Table 4-33.
IF Interface Voltage Table
Pin No
I.C.
AM
CW
FM
USB
LSB
A6A2-B5
U11,U15
LO
LO
LO
LO
HI
A6A2-B3
U11,U15
LO
LO
LO
HI
LO
A6A2-B1
U11,U15
LO
LO
LO
LO
LO
A6A2-B18
Ull
LO
HI
LO
HI
HI
A6A2-B16
Ull
LO
LO
HI
' LO
LO
A6A2-B48
Ull
HI
LO
LO
LO
LO
A6A2-B60
U10
HI
LO
HI
LO
LO
Pin no
I.C.
50kHz
6kHz
3.2kHz
1.0kHz
0.3kHz
USB/LSB
A6A2-B49
U10
HI
HI
HI
LO
LO
LO
A6A2-B51 U10,U15
HI
LO
LO
HI
HI
HI
A6A2-B53 U10,U15
LO
HI
LO
LO
LO
LO
A6A2-B55 U10,U15
LO
LO
HI
LO
LO
LO
A6A2-B47 U10,U15
LO
LO
LO
HI
LO
LO
A6A2-B45 U10,U15
LO
LO
LO
LO
HI
LO
7.
When
the IF Interface has been repaired and is
operating satisfactorily, deenergize the receiver and
disconnect test equipment, if no further tests are to be
performed.
4-51
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