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Zeromatte Function Test Procedure
e1
IC3
2
4
e2
e3
Frequency: 2510 520 MHz
760la 1000MHz
Frequency:
1000.005 la 1300 MHz
Zeromatic lunctions when OUTPUT is L.
(NFM)
(WFM)
Discriminator Curve
~
OUTPUT
I
~ " , < " , e c . C 1 < " ' 3 , - - - - -
--:1
:"'3<.::<"'-e'-.:1<"'e'.'=2------1 e"' H 2;.::<",e' - .:1<,,-,V,-,c,,-c- - - - -
NFM Modulalion
Ta adjust the e1 voltage. receive a signal in the manual mode and set Tg to obtain
4.o!8-
3
V al TP2. It is convenient
to use the National Weather Service signal tor this adjustment.
WFM Modulalion
Ta adjusllhe e1 voltage. receive a signal in Ihe manual mode and set T5 to obtain
4.o!8·
3
V at TP1. It is convenient
la use the FM or TV sound signal lor this adjustment.
-18-
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