Keysight N8973B User Manual

N8973B, 74B, 75B NFA RF BLOCK DIAGRAM
(Lowband Path - Input signals < 3.6 GHz)
RF (Low Freq)
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
-25 dBm
-35 dBm
-37 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
J13
J1
3.6 GHz - 13.6 GHz Path
3.6 GHz - 26.5 GHz
3 Hz - 3.6 GHz
Thru Path
4 GHz
+30 dB
-32 dBm
Preamp
Mixer 3
Mixer 2
Mixer 1
Preamp
Electronic Attenuator
To A2
Analog IF
2nd LO
4800 MHz
3 - 15 dBm
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
W8 W7
IF OUT
322.5 MHz
-28 dBm
+8 dBm
W17
J903
J102
J301
to AIF
322.5 MHz
-29 dBm
W37
Burst
Trigger
J1100
W16
W18
W22
J800
J700
J300 J302
Preselector
J3
J3J5
J10
J11
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
IF OUT from A13
NOTE: Power levels based on these settings:
Mode: Spectrum Analyzer unless specified differently
Input Signal 50 MHz Calibrator (Press Input/Output, RF Calibrator, 50 MHz)
Center Frequency 50 MHz
Span 0 Hz
Input Attenuation 10 dB
Preamp OFF
Auto Align OFF after initial Auto Align
FOOTNOTES
1
IF Path IF Freq.
10 MHz
25 MHz
322.5 MHz
322.5 MHz
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 INIF OUT
AUX LO
+10 dBm
AUX LO
+3 dBm
block_nfab_rf_low
Center: 5.1 GHz
3 dB BW: 150 MHz
from A14
LO Synthesizer
J4
J12
J2
Signal levels above 3 GHz include cable loss
of measurement system
SWEEP
RAMP
J1
J6
7-19-2017

Keysight N8973B Specifications

General

Brand	Keysight
Model	N8973B
Category	Measuring Instruments
Language	English