
The
and sampler/mixers all down-convert the RF input signals
to
4
IF signals with amplitude and phase corresponding to the
RF’ input. The and sampler/mixer assemblies both include an 8 gain
preamplifier in front of the sampler. This improves the noise figure performance
of the analyzer’s receiver channels A and B.
In high band operation, the sampling rate of the samplers is controlled by
the LO from the pulse generator assembly. The LO is a comb of
harmonics produced by a step recovery diode driven by the fractional-N VCO
fundamental signal. One of the harmonic signals is 1 MHz below the start
frequency set at the front panel. The LO is combined in the samplers
with the RF input signal from the source. In the Option 006, samplers are
additionally capable of recognizing RF input signals from 3 to 6
The mixing
products are
so that the only remaining response is the difference
between the source frequency and the harmonic 1 MHz below it. This
back to the All phase lock assembly.
In low band or super low band the sampler diodes are biased continuously on,
so that the RF input signal passes through them unchanged. Thus the IF
is identical to the RF output signal from the source (300
to 16 MHz for
10 to 300
for super lowband), and sweeps with it. Part of the
IF signal from the R sampler is fed back to the All phase lock assembly.
(Refer to “Source Theory Overview” for information on high band and low band
operation of the source.)
The
LO is obtained from the
reference assembly. In high band, the
LO is
at 996
This is produced by feeding the 39.34 MHz output of a
phase-locked oscillator in the
assembly through a
circuit.
In low band, the
is a variable frequency produced by mixing the output
of the fractional-N
with a
39.996 MHz signal in the
assembly.
The
covers the range of 0.014 to 16.004 MHz in two subsweeps that
correspond with the source subsweeps These subsweeps are 0.304 to 3.304 MHz
and 3.304 to 16.004 MHz.
Theory of Operation
Содержание HP 8753E
Страница 2: ...Service Guide HP 8753E Network Analyzer HEWLETT PACKARD ...
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Страница 70: ...A10 A8 All A12 Figure 2 13 Flexible RF Cable Location 2 34 System Verification and Performance Tests ...
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Страница 93: ...W32 Figure 2 26 HP 8753E Bottom View sg6102e System Verification and 2 57 Performance Tests ...
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Страница 289: ...Digital Control Group Block Diagram Figure 6 1 Digital Control Group Block Diagram 6 2 Digital Control Troubleshooting ...
Страница 298: ...3 Rings Acceptable V 4 Rings Unacceptable Figure 6 5 Newtons Rings sb8123d Digital Control Troubleshooting 6 11 ...
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Страница 350: ...START 030 000 MHZ Figure 8 2 Typical Good Trace Receiver Troubleshooting 8 5 ...
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Страница 366: ...Figure 9 2 Typical Smith Chart Traces of Good Short a and Open b Accessories Troubleshooting 9 7 ...
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Страница 451: ...L _ I 7 _ IT J sg6107e Pie 12 3 Digital Control Group Simplified Block Diagram Theory of Operation 12 9 ...
Страница 479: ...Major Assemblies hp A10 A8 All A12 A15 A20 A4 sg654e Al3 Al4 Replaceable Parts 13 7 ...
Страница 481: ...Major Assemblies Bottom CPU Fan A24 Ai A23 A21 A9BTl sg6126e Replaceable Parts 13 8 ...
Страница 483: ...Cables lbp w4 w3 w2 w5 W6 w7 W26 WI2 WI1 WI0 w9 W8 sg656e Replaceable Parts 13 11 ...
Страница 485: ...Cables Bottom W38 w32 w33 wzo A137 I I A22kl i l l AilWl Replaceable Parts 13 13 ...
Страница 487: ...hbles Front w22 W23 I AIWI RPGIWI sg658e ReplaceableParts 13 15 ...
Страница 489: ...Cables Rear W36 w21 i w35 w30 sg6113e ReplaceableParts 13 17 ...
Страница 491: ...Cables Source A3A4Wl I A3W3 A3W4 BACK FRONT sg662e Replaceable Parts 13 l 9 ...
Страница 493: ...Front Panel Assembly Outside sg663e ReplaceablsParts 13 21 ...
Страница 495: ...Front Panel Assembly Inside 4 P l a c e s 4 P l a c e s 2 P l a c e s WI7 sg6122e Replaceable Partr 13 23 ...
Страница 497: ...Rear Panel Assembly 8 Places 9 15 0 13 es P A R T O F F A N sg665e ReplaceableParts 13 25 ...
Страница 499: ...Rear Panel Assembly Option lD5 sg666e Replawable Parts 13 27 ...
Страница 503: ... L P l a c e s 3 Places 6 2 PLacesI x 5 3 Places 3 P l a c e s sgbb0e Replaceable Parts 13 3 1 ...
Страница 505: ...Hardware Front sg669e I2 P l a c e s Replaceable Parts 1333 ...
Страница 507: ...Hardware l t Set Deck 5 P l a c e s 8 P l a c e s I A 2 P l a c e s sg670e Replaceable Partr 13 35 ...
Страница 509: ...Hardware Disk Drive Support 4 P l a c e s Q G 4 P l a c e s Replaceable Parts 13 37 ...
Страница 511: ...Replaceable Partr 1339 ...
Страница 513: ...Hardware Preregulator Al5 IL sg673e ReplaceableParts 1341 ...
Страница 517: ...Chassis Parts Inside 16 Places sg675e ReplaceableParts 1345 ...
Страница 527: ...Covers sg677e Assambly Replacement and Post Repair Procedures 14 7 ...
Страница 529: ...Front Pctnel Assembly Asssmbly Replacement and Post Repair Procedures 14 9 ...
Страница 531: ...Front Panel Keyboard and Interface Assemblies sg680e Assambly Replasement andPost RepairProcedures 14 l1 ...
Страница 534: ...Display Iamp and hverter Assemblies 3 Places shg6113e 14 14 mmbly Replacement and Post RepairProcedures ...
Страница 537: ...Rear Panel Assembly 14 18 Assembly Replacement and Post Repair Procedures ...
Страница 539: ...Rear Panel Interface Board Assembly 7 2 Opt ID5 only only sg604e Asssmbly Replasement and Post Repair Procedures 14 21 ...
Страница 541: ...W26 w1 W2L A3 Source Assembly A3 AwnMy Replacclment sad Post Repair Procedures 14 23 ...
Страница 549: ...A9 CPU Board w37 w20 sg6112e Assembly Replacement and Post Repair Procedures 14 33 ...
Страница 550: ...A9 CPU Board I VII c A9 sg690e 14 34 Assembly Replasemeat and Post Repair Procedures ...
Страница 552: ...A9BTl Battery 0 IIII d I A9 A9BTl sg691e Asssmbly Replacement and Post Repair Procedures 14 37 ...
Страница 554: ...Al5 Preregulator A8J2 I b 2 3 Places Al5 A17J3 2 Placed sg692e Assembly Replacement and Post Repair Procedures 1448 ...
Страница 560: ...A19 Graphics Processor 6 Plocesl Cc 2 P sg695e Awembly Replacement and Post Repair Procedures 1446 ...
Страница 562: ...A20 Disk Drive Assembly sg696e Assembly Replacement and Post Repair Procedures 1447 ...
Страница 568: ...A23 LED Board III II III Z I II 0 A 3 sg698e Assambly Replacement and Post Repair Procedures 14 53 ...
Страница 570: ...A24 Transfer Switch w32 w31 J3 A2LWl 2 Places sg699e Assembly Replasement and Post Repair Prosedures 14 55 ...
Страница 576: ...Bl Fhn Assembly 4 PLACES hg628d Assembly Replacement and Pest Repair Procedures 14 61 ...