Block Diagram For N5183B - Keysight N5171B EXG Service Manual

Yellow Blocks – A3 RF Assembly
Reference
100MHz
VCXO

Flexible Reference FPGA
1-50 MHz
2
N.f
PFD
REF IN R (1-50) 2
10 MHz OUT 10
10 MHz 10 MHz
Signal
OCXO
Conditioning
X2, X5
PFD
Multiplier
Chain
DAC
OCXO_TUNE
100 MHz
Synthesizer Multipliers
First Doubler / Filter
1.5 to 3.0 GHz
1.5-1.9GHz
0.75 to 1.5 GHz
x2
1.9-2.4GHz
2.4-3.0GHz
Divider / Filter
390MHz
÷N
600MHz
0.75 to 1.5 GHz
900MHz
1500MHz
COAX
A7 Real Time Baseband Processor – Option 660
P500
Multi-Channel Real Time Generator DSP
Formatter Spread
Payload Symbol Scramble Filter
Generator Channel Builder Convolve Resample
A8
Coding Encode
Digital Bus
+
Connector
Board
Formatter Spread
Payload Symbol Scramble Filter
Generator Channel Builder Convolve Resample
Coding Encode
Only available on N5182B
Synthesizer
Phase
Frequency
Detector
50 MHz 50 MHz
2
Loop Filter, Bandwidth
Selection & Gain
FN Loop
100
MHz
FM
1.0 GHz
X5 X2
0.5 GHz
Shock Line
0.5 GHz 0.5 GHz
J5000
COAX
Second Doubler / Filter
3.0-3.8GHz
3.0 – 6.0 GHz
0.25 to 6.0 GHz
3.8-4.8GHz
x2
Attenuator
4.8-6.0GHz
.25 to 3.0 GHz
0.25 to 1.5 GHz External LO Rear Panel
LO OUT
Option 012
DAC CLK IN
COAX
Nonfunctional
LO IN
COAX
COAX
IQ Modulator RF Section
100MHz 800MHz P1 P2
Ref In Ext In RF In RF Out
X
Attenuator Filters
DAC Clock PLL COAX
800 MHz
I Q
200 MHz
DSP
Modulator I
Filter
IQ
Resampler
Filters MUX
Channel
ARB Q
IQ Correction
Digital
Data
AWGN
MUX
A2 Baseband Vector
Waveform
Memory Section - BBG
Triggers Markers
DIGITAL BUS I/O
Event 1
BB BB Pat
TRIG 1 TRIG 2 TRIG
FM
62.5 to PFD
1-2 GHz VCO Mode A/B FM
125 MHz
 16 
1 to
2 GHz
Compensation
FracN
FM
1.0 GHz
62.5 MHz
8
Loop Filter,
187.5 MHz
Bandwidth
Selection & Gain
62.5 or
Diplexer
187.5 MHz Compensation
HP

LP
V
50
BIAS
PFD Pretune
RF Output
3.0 to
6.0 GHz
Pulse
0.25 to
Generator
3.0 GHz
Control
1GHz from Reference
PULSE
Modulation Mux
FM Out
EXT 1
ADC
I OUT
LF OUT
LF
Function
- I OUT
Generator
EXT 2
ADC
Q OUT
AM
DAC
- Q OUT
I IN
Q IN TRIG 1
Sweep
Trigger
Out
Interface
Imterface
TRIG 2
SWEEP
OUT
FM
Loop Filter, Bandwidth
Selection & Gain
Compensation
0.75-1.5 GHz
Pretune
Sum Loop
3.0 to 6.0 GHz
3 to 6 GHz
N x 500 +/- F
REF
3-6 GHz VCO
0.75 to 1.5 GHz
Gain Slope Gain Slope Gain Slope
High Band
High Band
Low Band
Switched 250 MHz
Het Band
1.00 to 1.25 GHz 10MHz to OP AMP Band
250MHz
9kHz to 10MHz
350MHz 350MHz
1GHz
Window
ALC_UNLEVELED_L
ALC_DET ALC_LOG_DET Comparator
Preamp

_
Log
x5
_
+
Loop
Integrator
Automatic Level Control
ALC_LOOP_INT
ALC_REF_PLUS_AM
 Feed Forward
Ref
DAC
Temp
TC Adj
Sense DAC
Exp AM
Log
Linear AM
Keysight MXG-B RF Analog/Vector
+ Real Time Signal Flow Diagram
Electronic Attenuator
RPP
Sense
5, 10, 5, 10,
40dB 20dB 40dB
RF Output
AT1 AT2 AT3
ALC Detector
Window
Comparator
ALC_MOD_I
_

Recp
Filter
+
DET_REF
ALC Detector Temp Control