Table of Contents
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REAR PANEL
N5247B 4-Port Overall Block Diagram
FRONT PANEL
INTERCONNECTS
INTERCONNECTS
Including Options 401-Standard; 419-Attenuators and Bias Tees;
423-Attenuators, Bias Tees, Combiner and Source Bypass Switches
A3
A2
USB x 4
DISPLAY
USB BD
USB
HUB
DISPLAY
INVERTER
PROCESSOR
POWER
KEYPAD
A21 CPU
FLASH
A55
HARD DISK
RAM
DRIVE
SPEAKER
A1 FRONT PANEL INTERFACE BOARD
USB x 4
USB
EEPROM
INTERFACE
GPIB PORT
MAIN
PCI BUS
CONTROLLER
GPIB
INTERFACE
CPU
10/100 BASE-T
LAN
ETHERNET
ROM
RAM
VGA
VIDEO PROCESSOR
VGA
INTERFACE
VIDEO RAM
A20
POWER
A19 MIDPLANE
SUPPLY
AC LINE IN
A18
A22
SYSTEM
GPIB
POWER BUS
MOTHERBOARD
TALKER/LISTENER
GPIB PORT
GPIB
INTERFACE
LOCAL DIGITAL BUS
DIRECT CONNECT
HIGH DENSITY DATA BUS
A23
TO A4, A5, A7, A8,
TEST SET
A10, A12, A13,
MOTHERBOARD
POWER BUS
A14, A15, A17
RIBBON CABLE CONNECTIONS
LOCAL DIGITAL BUS
TO A24, A25, A27, A28,
A37-A41, A46-A53
MIXED POWER AND CONTROL SIGNALS
FROM THE A23 TEST SET MOTHERBOARD
SERIAL TEST BUS NODES
Bx = ACTIVE SOURCE BAND
10 MHz REF
PULSE I/O
A24 J20
OPTION 029
A24 J2
A
A9 NOISE RECEIVER
A24 J202
B
A24 J602
IF INPUTS
C/R1
A24 J802
D/R2
A24 J402
R
LOAD
W69
31.6 MHz
LO OUT (J5)
0.01 - 26.5 GHz
L
I
R
12 MHz
LOAD
TO A14
A DC
EXT
W66
3.2 - 19 GHz
RF1 OUT (J6)
TSET
LOW BAND
D RIVE
OVERLOAD
DETECTOR
LOAD
W68
31.6 MHz
RF2 OUT (J12)
3.2 - 19 GHz
LOAD
W134
To A51
rt 3
SW TSET IN (J7)
SW TSET IN (J3)
W138
To A56
rt 4
W143
W137
From A56
SW SRC OUT (J4)
SW TSET IN (J1)
W142
To A53
A15 13.5 GHz LO SYNTHESIZER
rt 2
W143
W141
From A53
B23,29-30,
6.75-8.0 GHz
2-4 GHz
37,45-46
SW SRC OUT (J2)
∫
B22,26-28,
5.33-6.75 GHz
B21-48
34-36,41-44
MAIN
X2
22,23
B21,24-25,
4.0-5.33 GHz
φ
31-33,38-40,
Frac-N
47-48
ƒ
Logic
3.0-4.0 GHz
B19-20
50 MHz
REF
A14 FREQUENCY REFERENCE
2.0-3.0 GHz
J5
B18
10 MHz
10 MHz
W88
W84
10 MHz
J3
10 MHz REF
1.0-2.0 GHz
REF OUT
J4
B16-17
÷2
50 MHz
10 MHz
50 MHz REF
W85
0.5-1.0 GHz
HIGH STAB
÷2
OCXO
J5
250 MHz
B14-15
÷4
W86
DAC
J6
LOCAL
DDS
0.25-0.5 GHz
DIGITAL
100 MHz
W87
BUS
B12-13
÷8
φ
J7
POWER
B2-11
ƒ
÷10
BUS
DDS=Direct Digital Synthesizer
NC
J8
W89
10 MHz
10 MHz
J2
0-200 Hz
∫
REF IN
A17 13.5 GHz SOURCE 2 SYNTHESIZER
B23,29-30,
6.75-8.0 GHz
2-4 GHz
37,45-46
∫
5.33-6.75 GHz
B22,26-28,
MAIN
B21-48
X2
34-36,41-44
19,20
B21,24-25,
4.0-5.33 GHz
φ
31-33,38-40,
A23 TEST SET MOTHERBOARD
Frac-N
47-48
ƒ
Logic
BIAS 1 IN
3.0-4.0 GHz
B19-20
2
\
DC BIAS 1 TO A42
50 MHz
J541
REF
2.0-3.0 GHz
J5
BIAS 3 IN
B18
1.0-2.0 GHz
2
\
DC BIAS 3 TO A43
B16-17
÷2
J542
0.5-1.0 GHz
BIAS 4 IN
B14-15
250 MHz
÷4
2
LOCAL
DDS
\
DC BIAS 4 TO A44
0.25-0.5 GHz
J543
DIGITAL
B12-13
BUS
÷8
BIAS 2 IN
POWER
B2-11
BUS
DDS=Direct Digital Synthesizer
2
\
DC BIAS 2 TO A45
J544
A4 13.5 GHz SOURCE 1 SYNTHESIZER
MEAS TRIG RDY
MEAS TRIG RDY
6.75-8.0 GHz
B23,29-30,
2-4 GHz
37,45-46
AUX TRIG 1 IN
AUX TRIG 1 IN
∫
5.33-6.75 GHz
B22,26-28,
B21-48
34-36,41-44
AUX TRIG 1 OUT
AUX TRIG 1 OUT
MAIN
X2
16,17
B21,24-25,
AUX TRIG 2 IN
AUX TRIG 2 IN
φ
31-33,38-40,
4.0-5.33 GHz
Frac-N
47-48
ƒ
POWER
Logic
AUX TRIG 2 OUT
AUX TRIG 2 OUT
BUS
3.0-4.0 GHz
TO
B19-20
28 V
28 V
A34 THRU A37,
50 MHz
REF
A42 THRU A49
2.0-3.0 GHz
MEAS TRIG IN
MEAS TRIG IN
LOCAL
J5
B18
DIGITAL BUS
1.0-2.0 GHz
25
TEST SET I/O
\
TEST SET I/O
B16-17
INTERFACE
÷2
9
PWR I/O
0.5-1.0 GHz
PWR I/O
\
B14-15
INTERFACE
250 MHz
÷4
DDS
HANDLER I/O
36
HANDLER I/O
LOCAL
0.25-0.5 GHz
\
INTERFACE
DIGITAL
BUS
B12-13
÷8
POWER
B2-11
BUS
DDS=Direct Digital Synthesizer
4 port
A24 IF MULTIPLEXER
Main IF A
10.7 MHz
Pulse A
PULSE
A16 SIGNAL PROCESSING
GATES
ADC MODULE (SPAM)
IF OUT A
Ext IF In A
P3
Aux R3
9 MHz
LFE IF A
J1
W79
ADC
15 MHz
A
Main IF B
9 MHz
10.7 MHz
Pulse B
PULSE
J2
W80
GATES
ADC
15 MHz
IF OUT B
Ext IF In B
B
P203
Aux R4
PCI
9 MHz
LFE IF B
BRIDGE
J4
W81
ADC
15 MHz
R
Main IF R
9 MHz
10.7 MHz
DSP
Pulse R
PULSE
J5
W82
GATES
ADC
15 MHz
IF OUT R
Ext IF In R
RAM
C/R1
P403
LFE IF R
9 MHz
J6
W83
ADC
15 MHz
D/R2
Main IF C
10.7 MHz
Pulse C
PULSE
GATES
IF OUT C/R1
Ext IF In C
P603
AUX R2
LFE IF C
DITHER
4
X6
PULSE
\
NOISE
DRIVE
TO A24
10 MHz REF
J3
THRU A18
Main IF D
10.7 MHz
Pulse D
PULSE
GATES
IF OUT D/R2
Ext IF In D
P803
Aux R1
LFE IF D
FROM A16
4
PULSE DRIVE
PULSE
\
MODULATION
THRU A18
LOGIC
SOURCE
PULSE
DRIVE OUT
15
\
5
IF INPUTS
\
A59 NOISE DOWNCONVERTER
W171
10-25 MHz
J6
40.0-50.0 GHz
25-60 MHz
J3
X2
32.0-40.0 GHz
60-150 MHz
36.0-50.0 GHz
3.0 GHz
26.0-32.0 GHz
150-350 MHz
26.0-36.0 GHz
350-750 MHz
J4
W172
L
I
R
0.75-1.5 GHz
12.0-26.0 GHz
1.5-3.0 GHz
HIGH BAND
W175
J2
OVERLOAD
6.0-12.0 GHz
DETECTOR
J1
J5
J1
3.0-6.0 GHz
W173
0.010-6.00 GHz
EXT TEST SET DRIVE LO OUT
EXT TEST SET DRIVE RF1 OUT
W66
W65
EXT TEST SET DRIVE RF2 OUT
W68
W67
A25 LO MULTIPLIER/AMPLIFIER 26.5 (HMA26.5)
B26-28,
34-36,
10.66-13.51 GHz
B24-28,
41-44
31-36,
38-44,
47-48
20.0-26.5 GHz
X2
A26 SPLITTER
8.0-10.66 GHz
B33-35,
2
1
B24-25,
46-48
31-33,
15.4-20.0 GHz
W63
B29-35,
26 GHz
0.013 -
38-40, 47-48
12.5 MHz to
40-48
X2
W62
13.518 GHz
B30-32,
26.508 GHz
B2-51
13.518-
42-45
W64
0.01-13.51 GHz
26.508 GHz
13.5-15.4 GHz
-10 to +10 dBm
W61
B29,
B21-23,
14
29-30,37,
J1207
40-41
45-46
15
∫
ALC
13 GHz
B2-28,36-39
0.013-13.518 GHz
FROM
A19
FROM
J102
A23
A10 26.5 GHz SOURCE (SOURCE 2)
J402
P4
B26-28,
34-36,
10.66-13.51 GHz
B24-28,
41-44
31-36,
38-44,
20-26.5 GHz
47-48
30
X2
8.0-10.66 GHz
12.8-20 GHz
16-20 GHz
B28
B29-48
B24-25,
X2
B31,38,47-48
B20-48
31-33,
8.5-12.8 GHz
38-40, 47-48
B29-31,
13.5-16 GHz
B20-28
B25-27
B20-28
B29-30,37,
B2-51
3
37-38,45-48
45-46
ALC
Modulator
5.33-8.5 GHz
11
B2-28
0.01-13.51 GHz
Pulse
0.01-13.5 GHz
-10 to +10 dBm
Modulator
B22-24
W2
B20-28,32-36,39-44
OUT 1
B21-23,
29-30,37,
J1207
P1
45-46
B2-19
3.2-5.33 GHz
13
B20-21
B20-28
ALC
B2-28
12
B2-19
B2-28
ALC
0.01-13.5 GHz
Modulator
OUT 2
3.2 GHz
LOCAL
B2-19
B2-19
DIGITAL
P2
P6
BUS
J102
PIN-switched LPF
POWER
ALC
Pulse
BUS
Modulator
Modulator
10 MHz-3.2 GHz
A5 26.5 GHz SOURCE (SOURCE 1)
J402
P4
B26-28,
34-36,
10.66-13.51 GHz
B24-28,
41-44
31-36,
38-44,
20-26.5 GHz
47-48
X2
29
8.0-10.66 GHz
12.8-20 GHz
16-20 GHz
B28
B29-48
B24-25,
B31,38,47-48
B20-48
31-33,
X2
8.5-12.8 GHz
38-40, 47-48
B29-31,
B20-28
B25-27
B20-28
3
B29-30,37,
13.5-16 GHz
B2-51
37-38,45-48
45-46
ALC
Modulator
8
B2-28
0.01-13.51 GHz
Pulse
5.33-8.5 GHz
-10 to +10 dBm
Modulator
B22-24
0.01-13.5 GHz
W1
OUT 1
B21-23,
B20-28,32-36,39-44
29-30,37,
J1207
P1
45-46
3.2-5.33 GHz
10
B2-19
B20-21
B20-28
ALC
B2-28
9
B2-19
B2-28
ALC
0.01-13.5 GHz
Modulator
OUT 2
3.2 GHz
LOCAL
B2-19
B2-19
DIGITAL
BUS
P2
P6
J102
PIN-switched LPF
POWER
ALC
Pulse
BUS
Modulator
Modulator
10 MHz-3.2 GHz
A27 MIXER BRICK (1)
IF = 0.826 MHz for CW Freq < 53 MHz
IF = 7.438 MHz for CW Freq > 53 MHz
A
70.0 MHz
W71
A
A
P1
I
R
L
W72
70.0 MHz
R1
R1
I
R
L
70.0 MHz
W73
R2
I
R
R2
B
L
P201
W74
70.0 MHz
B
B
I
R
R1
L
P411
R2
P412
R
W69
EXT TSET DRIVE LO OUT
FROM
A23
R3
RECEIVER LO DRIVE
P413
A28 MIXER BRICK (2)
R4
P414
70.0 MHz
W75
D
D
C/R1
I
R
L
P601
A69 ATTEN
70.0 MHz
W76
R4
R4
I
R
L
3 dB
70.0 MHz
W77
R3
R3
I
R
L
D/R2
P801
70.0 MHz
W78
C
C
I
R
L
WITHOUT OPTION 029
W58
FROM
TERMINATION
A23
OPTION 029
W174
P1
FROM A23
RECEIVER LO DRIVE
W11
W12
3.2 - 19 GHz
A7 40 GHz
P2
A60 70 GHz DOUBLER
B39-48
DOUBLER
P5
20-35 GHz
40-50 GHz
32-50 GHz
40-50 GHz
B39-43
B38
35 GHz
ALC
B38,
32-40 GHz
W13
W14
Modulator
47-48
19-50 GHz
26.5-32 GHz
X2
50-70 GHz
W5
P4
B36-37
9
B44-48
X2
B35-37
24-32 GHz
ALC
40-70 GHz
Modulator
Pulse
43-46
19-26.5 GHz
Modulator
25
ALC
19-50 GHz
B32-35
5
Modulator
Pulse
P6
W6
19-24 GHz
Modulators
B32-34,
39-42
P3
20 GHz
B29-31
13.5-19 GHz
Detector
W91
J401
Feedback
J2
13.5-19.5 GHz
Pulse
W92
Modulator
J500
J4
10 MHz - 13.5 GHz
Modulator
P1
Control
3.2 - 19 GHz
W15
W16
A12 40 GHz
P2
B39-48
A61 70 GHz DOUBLER
DOUBLER
P5
20-35 GHz
40-50 GHz
32-50 GHz
40-50 GHz
B38
B39-43
32-40 GHz
W17
W18
35 GHz
ALC
B38,
Modulator
47-48
19-50 GHz
26.5-32 GHz
X2
50-70 GHz
W9
P4
B36-37
9
B44-48
X2
ALC
40-70 GHz
B35-37
24-32 GHz
43-46
19-26.5 GHz
Modulator
Pulse
ALC
19-50 GHz
5
Modulator
27
B32-35
Modulator
Pulse
P6
W10
B32-34,
19-24 GHz
Modulators
39-42
P3
20 GHz
B29-31
13.5-19 GHz
Detector
W93
Feedback
J401
J2
13.5-19.5 GHz
Pulse
W94
Modulator
J500
J4
10 MHz - 13.5 GHz
Modulator
Control
P1
W19
W20
50 OHM
A13 40 GHz
LOAD
P2
B39-48
A62 70 GHz DOUBLER
20-35 GHz
DOUBLER
P5
W7
40-50 GHz
32-50 GHz
40-50 GHz
P5
B38
B39-43
35 GHz
ALC
B38,
32-40 GHz
W21
W22
Modulator
47-48
19-50 GHz
26.5-32 GHz
X2
50-70 GHz
4
P4
B36-37
9
B44-48
X2
24-32 GHz
ALC
40-70 GHz
B35-37
Modulator
Pulse
43-46
19-26.5 GHz
Modulator
W8
28
ALC
19-50 GHz
5
Modulator
Pulse
B32-35
P6
Modulators
P3
B32-34,
19-24 GHz
39-42
P3
20 GHz
B29-31
13.5-19 GHz
W95
Detector
Feedback
13.5-19.5 GHz
J401
J2
Pulse
W96
Modulator
J500
J4
10 MHz - 13.5 GHz
Modulator
P1
Control
W23
W24
A8 40 GHz
50 OHM
A63 70 GHz DOUBLER
LOAD
P2
B39-48
DOUBLER
P5
20-35 GHz
40-50 GHz
32-50 GHz
40-50 GHz
B38
B39-43
35 GHz
ALC
B38,
32-40 GHz
W25
W26
Modulator
19-50 GHz
26.5-32 GHz
X2
W3
47-48
50-70 GHz
W6
P4
B36-37
9
X2
B44-48
P5
B35-37
24-32 GHz
ALC
40-70 GHz
Modulator
Pulse
43-46
19-26.5 GHz
5
Modulator
50 OHM
26
ALC
19-50 GHz
B32-35
LOAD
Modulator
Pulse
P6
4
19-24 GHz
Modulators
B32-34,
39-42
P3
20 GHz
W4
B29-31
13.5-19 GHz
Detector
P3
W97
J401
Feedback
J2
13.5-19.5 GHz
Pulse
W98
Modulator
J500
J4
10 MHz - 13.5 GHz
Modulator
P1
Control
OPTION 401
W47
OPTION 419, 423
A46 STEP
ATTEN
W118
W117
TO A27 A
0-50 dB
W53
A37 REF
MIXER
SWITCH
OPTION 401
W48
OPTION 419, 423
A47 STEP
ATTEN
W120
W119
TO A28 C
0-50 dB
OPTION 401
W49
OPTION 419, 423
A48 STEP
ATTEN
W122
W121
TO A28 D
0-50 dB
W55
W41
W56 (401)
W145 (419, 423)
W45 (401)
W146 (419, 423)
OPTION 401
W50
OPTION 419, 423
A49 STEP
ATTEN
W124
W123
TO A27 B
0-50 dB
A29 RECEIVER
OPTION 401, 419
COUPLER
OPTION 401
W27
W31
W32
OPTION 419, 423
To Port 1
DC BIAS 1
OPTION 423
W60
A38 STEP
A42
ATTEN
LFE RF PORT 1
A50 BYPASS
BIAS TEE
W33 (401)
W130
SWITCH
W144 (419, 423)
W101
W102
W103
W104
From
W126
A60
W125
0-50 dB
50
W127
OPTION 029
To Port 1
DC BIAS 1
W36
10 MHz
to 40 GHz
A54
A38 STEP
A56 BYPASS
A42
B2-38
ATTEN
SWITCH
COMBINER
BIAS TEE
W81
W161
W162
W128
W165
W84
50
0-50 dB
W129
A64 TUNER
W164
W163
Z
x
9
10 MHz
to 70 GHz
OPTION 401, 419
A30 RECEIVER
COUPLER
OPTION 401
W35
W36
W28
10 MHz
to 40 GHz
OPTION 419, 423
B2-38
To Port 3
OPTION 423
W60
DC BIAS 3
W37
A39 STEP
A43
A51 BYPASS
ATTEN
BIAS TEE
From rear panel
SWITCH
SW TSET IN
W134
W105
W106
W107
W108
W132
W131
From A61
0-50 dB
50
W133
9
10 MHz
to 70 GHz
OPTION 401, 419
A31 RECEIVER
COUPLER
OPTION 401
W29
W39
W40
OPTION 419, 423
To Port 4
W60
DC BIAS 4
OPTION 423
10 MHz
W41
to 40 GHz
A40 STEP
A44
B2-38
A52 BYPASS
ATTEN
BIAS TEE
From rear panel
SWITCH
SW TSET IN
W138
W109
W110
W111
W112
W136
W135
From A62
0-50 dB
50
W137
To rear panel SW SRC OUT
9
10 MHz
to 70 GHz
A32 RECEIVER
OPTION 401, 419
COUPLER
OPTION 401
W30
W43
W44
OPTION 419, 423
To Port 2
W60
DC BIAS 2
OPTION 423
A41 STEP
W45
A45
ATTEN
LFE RF PORT 1
A53 BYPASS
BIAS TEE
10 MHz
From rear panel
SWITCH
to 40 GHz
W142
W113
W114
W115
W116
SW TSET IN
B2-38
W140
W139
From A63
0-50 dB
50
W141
OPTION 029
To Port 2
To rear panel SW SRC OUT
W36
DC BIAS 2
A41 STEP
A57 BYPASS
SWITCH
A45
ATTEN
BIAS TEE
W113
W114
W166
9
W167
W116
10 MHz
to 70 GHz
50
0-50 dB
W168
W169
FRONT PANEL
INTERCONNECTS
RCVR A IN
W60
Port 1
CPLR ARM
RCVR
A IN
W52
RCVR R1 IN
REF 1
W51
W60
SOURCE OUT
W54
RCVR R3 IN
REF 3
W37
W60
SOURCE OUT
RCVR C IN
W60
Port 3
CPLR ARM
RCVR
C IN
RCVR D IN
Port 4
W60
CPLR ARM
RCVR
D IN
RCVR R4 IN
REF 4
W60
SOURCE OUT
RCVR R2 IN
W60
REF 2
SOURCE OUT
RCVR B IN
Port 2
W60
CPLR ARM
RCVR
B IN
SOURCE OUT
Port 1
W60
CPLR THRU
A33
TEST PORT
COUPLER
PORT 1
W34
OPTION 423
W127
SW SOURCE OUT
W128
W60
COMBINER IN
W129
COMBINER IN
W133
W60
SW SOURCE OUT
SOURCE OUT
W60
Port 3
CPLR THRU
A34
TEST PORT
COUPLER
PORT 3
W38
SOURCE OUT
Port 4
W60
CPLR THRU
A35
TEST PORT
COUPLER
PORT 4
W42
SOURCE OUT
W60
Port 2
CPLR THRU
A36
TEST PORT
COUPLER
PORT 2
W46
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Table of Contents
Troubleshooting
