Agilent Technologies E4448A Service Guide

W51
A27 ELECTRONIC ATTENUATOR
OPTION B7J
W52
0-40 dB IN 1dB STEPS
FL1
3 GHz, LPF
To 3rd Converter
J1
FL2
BPF
CF= 3.9214 GHz
BW= 40MHz
W37
F
F
A20 LOWBAND
FIRST MIXER
L.O.
NULLING
3Hz-3GHz
-36 dBm
LIMITER
LO IF BIAS
BIAS-ADJ.
OVERLOAD
DETECTOR
RING RESONATOR
9dB
1ST IF AMP
-33 dBm
3.9214 GHz
-30 dBm
3dB
2dB
J3
J4
LO BIAS
ADJ.
2ND LO
POWER
DETECTOR
7.2 GHz
NOTCH
10dB
2ND LO
GAIN ADJ.
CF=3.6 GHz
J5
1ST LO
J7
J6
400 MHz
10dB
10dB
6dB
J2
J2
J3
J4
J6
J5
J1
J1
3.6 GHz
AUX OUT
-8 dBm
SECOND
MIXER
2ND LO
3.6 GHz, +1dBm
W41
3-7 GHz
+ 14 dBm
50
J8
A18
3-7 GHz YTO
+12
W35
W42
W98
W43
W94
W46
Preselector
SBTX LB
Switch
20
E4446A/E4447A/E4448A OPTION 110 AND 123 BLOCK DIAGRAM
A14 INPUT ATTENUATOR A
SW4
SW3
SW5
A36 PREAMP
(OPT 110)
A34 UNPRESELECTED
MIXER (OPT 123)
A35 MIXER
BIAS
AT3
AT1
AT2
A
RF-INPUT
DC COUPLED
3 Hz to fmax
Calibrator Signal
50 MHz CW, -25 dBm
fmax: E4446A = 44 GHz
E4447A = 42.98 GHz
E4448A = 50 MHz
A15 INPUT ATTENUATOR B
A38 OPTION DRIVER
RYTHM
A30 FIFA
W8
W20
W102
W103
W104
W101
W105
W34
W93
W99
-25 dBm
W7
W30
W29
MM BAND
3.92 GHz
-48 dBm
Odd/Even IF
W89
W38
W55
W68
W69
W25
W71
LO 3-7 GHz
-37 dBm
PRESELECTOR
E4446A/E4447A/E4448A
OPTION 110 AND 123 BLOCK DIAGRAM
January 30, 2006
block_110_123_46_47_48
6 dB
10 dB
3 dB
2 dB
3 dB
RF
LO
IF
2 dB
30 dB
2 dB
20 dB
A21 FREQ. EXT. LO MULTIPLIER/AMP (FELOMA)
(5087-7126)
6-14 GHz
+13 dBm
+14 dBm
3-7 GHz
-9 dBm
X2
SW1
U1
SBTX
YTF
3.9214 GHz
-32 dBm
+17
LO1
50 W
W56
W54
W39
A19 FL1
27 GHz LPF
Cable
3 Hz - 26.8 GHz
-37 dBm
@ 50 MHz
-40.5 dBm
@ 5 GHz
> 26.8 GHz
3 Hz - 2.85 GHz
LOW BAND
2.85 - 26.8 GHz
HIGH BAND
W47
W70
W53
W31
A13 FRONT END DRIVER
ATTENUATOR
CONTROL
1/N
COUNTER
16
BIT
DAC
DELAY
COMP.
BIAS/CTRL
32
N=1-2
1/N
MIXER
BIAS
SWITCH CONTROL
PREAMP CONTROL
SWITCH CONTROL
SWITCH CONTROL
32
N=1-2
1/N
COUNTER
16
BIT
DAC
48
N=1-2
10 kHz
10 kHz
TO 3rd CONVERTER
VIA MOTHERBOARD
YTF TUNE RAMP GENERATOR
VARIABLE GAIN RAMP GENERATOR
10 Mhz
REF.
PRE-SEL OUT
(REAR PANEL)
J5
1
1
2
2
4
4
3
3
NC
J6
J14
J1
J2
J9
J10
J4
ELECTRONIC
ATTENUATOR
CONTROL
LOWBAND
BIAS/CONTROL
FIFA
MODULE
BIAS/CTRL
J10
J13
J7
10
14
24
20
10
THERMOMETER
FROM LO VIA
MOTHERBOARD
YTO
MAIN COIL
FM COIL
PASS THRU
10
W90
W95
W91
J3
P1
J8
J7
J9
W106
W92
W96
10
10
10
9
10
20
W58
26
J8
J3
A29
LOMA/SBTX Driver
28v
REGULATOR
+32v
W24
W46
TO REAR PANEL
28v (SWITCHED)
A19
Mode: Spectrum Analysis
Center Frequency: 5 GHz
Span: 0 Hz.
Input Attenuation - 10 dB (Attenuator switches to 40 dB
when Preamp is enabled)
Note 1. Measured with Preamp On and Preselectors On
Note 2. Measured with Preamp Off and Preselectors Off
Note - POWER LEVELS BASED ON THESE SETTINGS:
Note 1:
-65 dBm
Note 2:
-36 dBm
Note 1:
-40 dBm
Note 2:
-37 dBm
Note 1:
-53 dBm
Note 2:
-50.5 dBm
Note 1:
-40.5 dBm
Note 2:
321.4 MHz
-50 dBm
Note 2:
5.321 GHz
11 dBm

Agilent Technologies E4448A Specifications

General

Brand	Agilent Technologies
Model	E4448A
Category	Measuring Instruments
Language	English