Keysight N9010A EXA Service Guide 315
L.O. Synthesizer/Reference Troubleshooting
A16 Reference Assembly Description
Table 8-2 A16 Reference Assembly Signals
Signal Description From Location Originates From To Location Purpose
External Reference Input
(1 to 50 MHz,
-5 dBm to +10 dBm)
Input from User n/a A16704 Phase Lock analyzer with user
reference.
10 MHz Out DIF A16J710 10 MHz Reference
A3J14
a
Used as a reference to other
assemblies throughout the
instrument.
50 MHz Align Signal A16J701 100 MHz VCXO/2 A9, Cal Signal
Input, Input
Attenuator A.
50 MHz Low band alignment
signal.
4800 MHz Align Signal A16J701 2.4 GHz VCXO x 2 or
100 MHz VCXO x 48
A9, Cal Signal
Input, Input
Attenuator A.
4.8 GHz High band alignment
signal
50 MHz Ecal/300 MHz
Comb Output
A16J705 100 MHz
VCXO/2, 100 MHz
VCXO x 3
A13J6, RF Front
End Assembly
50 MHz Cal Signal or 300 MHz
Comb for wideband I.F. phase
linearity
100 MHz
1st LO
A16J706 100 MHz
VCXO
A3J14
b
Used as a reference to other
assemblies throughout the
instrument.
100 MHz
Ref A
A16J707 100 MHz
VCXO
Not used Reserved for future use.
100 MHz
Ref B
A16J716 100 MHz
VCXO
A3J14
c
Frequency reference for A3
Digital IF (DIF) assembly.
Divided by 10 on DIF to provide
10 MHz OUT on rear panel.
100 MHz
Ref C
d
A16J707 100 MHz
VCXO
Not used Reserved for future use.
300 MHz LO AIF A16J711 100 MHz
VCXO x 3
A2J300 Used as 3rd LO on A2 Analog IF
(AIF) assembly
2.4 GHz Ref
A16J718
d
or
A16J715
e
2.4 GHz VCXO or 100
MHz VCXO x 24
Not used Reserved for future use.
4.8 GHz 2nd LO A16J702 2.4 GHz VCXO x 2 or
100 MHz VCXO x 48
A13J1 2nd LO for A13 Front End
assembly, downconvert low
band 1st IF to 322.5 MHz 2nd IF
4.8 GHz 1st LO Ref A16J703 2.4 GHz VCXO x 2 or
100 MHz VCXO x 48
A14J4 4.8 GHz reference for 1st L.O.
a. The 10 MHz signal from A16J713 is used a reference for the standard A3 Digital IF, which supports
analysis bandwidths up to 25 MHz.
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