Keysight E8257D/67D - A44 Scan Modulation Bias Adapter (E8257 D-520 and E8663 D Only)

A23 0-2 GHz
ALC Det
A24 2-20 GHz
ALC Det
0-20 GHz
output
Optional
Attenuator
AT1
5/10/40/20/40
0-3.2 GHz
A30 Mod/Filter uckt
ALC Pulse
3-20 GHz
**
**
**
1-7
8
0-3.2 GHz
A28 YTO 3-10 GHz
X2
A29 20 GHz Doubler uckt
To
Sampler
3-10
/ 2
N
A6 p/o Frac N board
0.25-3.2
GHz
ALC
/ 2
N
Ramp Swp
Prelevel
Scan
1GHz from
Ref board (A7)
** Not Necessary for E8663B
ALC Control
from ALC board
Option 521
0.01-20 GHz
Power Amp uckt **
LB Step
Atten
A8 Analog Output Board
10-250 MHz
.25 - 2 GHz
200 MHz
Pulse
0.25-3.2
GHz
Driver
Power
Amp
2 GHz
/ 2
N
/ 2
N
1
2-6
Dividers below 250 MHz
1
ALC
Control
0-3.2 GHz
A43 Amp/Filter Board
5-6
6
5
2-4
5
6
1-2
4
1,3-4
1-4
1-5
.25 - 3.2 GHz
0.1-250 MHz
Pulse
<0.25 GHz
2-4
5-6
300 MHz
LB Step
Atten
HPF above
396 MHz
DIVIDER_EN
DIVIDER
STEP_ATTEN
AUXOUT_SWITCH
RF_PATH
FILTER_PATHFILTER_PATH
6
3
3
LB_HB_AMPOUT_EN
LB_FIL_EN
HB_FIL_EN
LB_HB_PATH_IN_EN
Opt 1EW only
6
HPF_EN
H_BYPASS
+
Clamp
ALC Mod
Driver
Pwr
Limit
DAC
PWR_LIMIT_DAC
+
1,3-4
1-2
0.25-2.0 GHz
1
2-6
2-4
Block Diagram for the Analog Low Band RF Path, Service Guide E8251-90359
(prefix >
US4928/MY4928/SG4928)