HP 8562E Service Manual page 438

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A S V I N C R E A S E S -
A7 OUTPUT INCREASES
Refer to function block P on Al4 Frequency Control Schematic Diagram (sheet 3 of 5) in the
HP 8560 E-Series Spectrum Analyzer Component Level Information.
1. Connect the positive lead of a DVM to A14U417 pin 14 and the negative lead to A14J18
pin 6.
2. Set the HP 85623 to the following settings:
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..300MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OHz
3. The voltage should measure approximately 0 Vdc (TTL low).
4. Set the HP 85623 center frequency to 3 GHz.
5. The voltage should measure approximately f5 Vdc (TTL high).
12-12 RF Section
Figure 12-3. A7 First LO Distribution Amplifier Drive
S A M P L E R O U T - 9 T O - 2 dBn
J 3 I
H I B A N D +13 T O f16 d&n:
J 2
L O B A N D +13 T O +16 d&n*
J 5 I
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' P / O A l 4 F R E Q U E N C Y
I CONTROL
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REF VOLTAGE
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SCHEMAT I C
3 OF 5
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