Rf Highband Path #2 Block Diagram - Keysight N8973B Service Manual

N8975B NFA RF BLOCK DIAGRAM
(Highband Path #2 - Input signals 13.6 GHz to 26.5 GHz)
A9 INPUT A10 INPUT
RF
ATTENUATOR A
ATTENUATOR B
Input
2 dB 2 dB 30 dB 20 dB 6 dB 10 dB
-11 dBm
W10
W11
W19
Cal Signal
J
From A16 Reference
4800 MHz, -28 dBm
or
50 MHz, -25 dBm
W4 +15 dBm
from A14
LO Synthesizer
block_nfab_rf_hi2
W8
A11 LOWBAND
J4
SWITCH
A13 FRONT END
3.6 GHz - 26.5 GHz
J3
J9
-32 dBm
-23 dBm -38 dBm
J1
Preamp
W9
+30 dB
J2
3 Hz - 3.6 GHz
4 GHz Mixer 1
W3
Electronic Attenuator
J2
0 - 24 dB
Preamp
+20 dB
LO
DISTRIBUTION
ALIGNMENT
J4 THERMOMETER
J5 J3
J6
ECAL In
AUX LO AUX LO
A13W1
+10 dBm +3 dBm
W20
A13A1 BANDPASS FILTER
J2
A12 YTF
W7
Preselector
Mixer 3
13.6 GHz - 26.5 GHz Path
J7
IF OUT
322.5 MHz
-18 dBm
3.6 GHz - 13.6 GHz Path
Mixer 2
J8
8.3 GHz -
14 GHz
+18 dBm
J13
J12
Switch position shown
for input signals
17 - 26.5 GHz
2nd LO
4800 MHz
3 - 15 dBm
J1
X2
8.3 - 14 GHz
J10 J11
IF OUT IF IN
A13W2
IF
Center: 5.1 GHz
Out
3 dB BW: 150 MHz
A15 FRONT END CONTROLLER
J800
W16
ATTENUATOR CONTROL
J700
W18
LOW BAND SWITCH CONTROL
J300
PRESELECTOR DRIVER CONTROL
P/O Enhanced
Front End
3
Controller
W22
To A2
Analog IF
W15
IF In
J902
1
W36
BIAS
TEE
J903
+10 to
260 MHz - 400 MHz
-10 mA
DAC
VCO
MIXER BIAS, AMP BIAS,
W17
PREAMP BIAS, E-ATTEN CONTROL,
SWITCH CONTROL, 1st LO POWER OPTIMIZATION
J102
W5
from A16
Reference Bd
FOOTNOTES
1
IF OUT from A13
NOTE: Power levels based on these settings:
IF Path IF Freq.
Mode: Spectrum Analyzer unless specified differently
10 MHz 322.5 MHz
Input Signal 20 GHz, -10 dBm
Center Frequency 20 GHz
25 MHz 322.5 MHz
Span 0 Hz
Input Attenuation 10 dB
Preamp OFF
Auto Align OFF after initial Auto Align
Signal levels above 3 GHz include cable loss
of measurement system
J302
W37
J900
to AIF
322.5 MHz
-19 dBm
J901
Burst
Trigger
DAC
LOG
DET
J1100
120 MHz
LPF
SWEEP
RAMP
J301
RF (High Freq #2)
BLOCK DIAGRAM
8-03-2017