N8974B, 75B NFA
(Highband Path #1 - Input signals 3.6 GHz to 13.6 GHz)
RF BLOCK DIAGRAM
RF (High Freq #1)
BLOCK DIAGRAM
A9 INPUT
ATTENUATOR A
A15 FRONT END CONTROLLER
P/O Enhanced
Front End
Controller
A13A1 BANDPASS FILTER
A10 INPUT
ATTENUATOR B
A11 LOWBAND
SWITCH
A12 YTF
A13 FRONT END
30 dB
2 dB 2 dB
10 dB
-28 dBm
-38 dBm
20 dB 6 dB
0 - 24 dB
+20 dB
Cal Signal
From A16 Reference
4800 MHz, -28 dBm
or
50 MHz, -25 dBm
13.6 GHz - 26.5 GHz Path
J7
J9
J8
J1
3.6 GHz - 13.6 GHz Path
3.6 GHz - 26.5 GHz
3 Hz - 3.6 GHz
4 GHz
+30 dB
-46 dBm
Preamp
Mixer 3
Mixer 2
Mixer 1
Preamp
Electronic Attenuator
8.3 GHz -
14 GHz
+18 dBm
To A2
Analog IF
2nd LO
4800 MHz
3 - 15 dBm
Switch position shown
for input signals
8.4 - 13.6 GHz
W5
from A16
Reference Bd
260 MHz - 400 MHz
120 MHz
LPF
8.3 - 14 GHz
W19
W10
W11
W9
W3
J900
J901
J902
IF In
W36
W15
W7
IF OUT
322.5 MHz
-32 dBm
W17
J903
J102
J301
to AIF
322.5 MHz
-33 dBm
W37
Burst
Trigger
J1100
W16
W18
W22
J800
J700
J300
J302
W8
Preselector
J3
J3
J5
J10
J11
J6
ATTENUATOR CONTROL
LOW BAND SWITCH CONTROL
PRESELECTOR DRIVER CONTROL
X2
LOG
DET
J
ALIGNMENT
THERMOMETER
RF
Input
VCO
+10 to
-10 mA
DAC
DAC
LO
DISTRIBUTION
FOOTNOTES
BIAS
TEE
MIXER BIAS, AMP BIAS,
PREAMP BIAS, E-ATTEN CONTROL,
SWITCH CONTROL, 1st LO POWER OPTIMIZATION
A13W1
A13W2
W20
J2
J4
1
W4
+15 dBm
IF
Out
J2
ECAL In
IF IN
IF OUT
AUX LO
+10 dBm
AUX LO
+3 dBm
block_nfab_rf_hi1
Center: 5.1 GHz
3 dB BW: 150 MHz
from A14
LO Synthesizer
J4
J12
J2
SWEEP
RAMP
-52 dBm
J1
J13
NOTE: Power levels based on these settings:
Mode: Spectrum Analyzer unless specified differently
Input Signal 4.8 GHz Calibrator (Press Input/Output, RF Calibrator, 4.8 GHz)
Center Frequency 4.8 GHz
Span 0 Hz
Input Attenuation 10 dB
Preamp OFF
Auto Align OFF after initial Auto Align
1
Signal levels above 3 GHz include cable loss
of measurement system
IF OUT from A13
IF Path
IF Freq.
10 MHz
25 MHz
322.5 MHz
322.5 MHz
8-03-2017
Содержание N8973B
Страница 4: ...4 ...
Страница 44: ...44 Keysight NFA Series Noise Figure Analyzers Service Guide Overview How to Return Your Instrument for Service ...
Страница 132: ...132 Keysight NFA Series Noise Figure Analyzers Service Guide Instrument Messages Condition Messages ...
Страница 228: ...228 Keysight NFA Series Noise Figure Analyzers Service Guide RF Section Troubleshooting N8976B Troubleshooting ...
Страница 268: ...268 Keysight NFA Series Noise Figure Analyzers Service Guide Analog Digital IF Troubleshooting 25 MHz BW IF Section ...
Страница 322: ...322 Keysight NFA Series Noise Figure Analyzers Service Guide Block Diagrams Block Diagrams Block Diagrams ...
Страница 332: ...332 Keysight NFA Series Noise Figure Analyzers Service Guide Block Diagrams Block Diagrams NFA Computer Block Diagram ...
Страница 350: ...350 Keysight NFA Series Noise Figure Analyzers Service Guide Service and Diagnostics Menus Front Panel Key Test ...
Страница 470: ...470 Keysight NFA Series Noise Figure Analyzers Service Guide Assembly Replacement Procedures Front Frame Assembly ...