Agilent Technologies PSA Series Service Manual page 193

OPTION 123 (E4440A, 43A, 45A only)
SWITCHABLE MICROWAVE PRESELECTOR BYPASS BLOCK DIAGRAM
A14 INPUT ATTENUATOR A
5 GHz, -25 dBm
RF-INPUT
DC COUPLED 3Hz to f max
W7
AC COUPLED 20MHz to f max
(Coupling not automatic)
f max:
E4440A= 26.5 GHz
E4445A= 13.2 GHz
E4443A= 6.7 GHz
W20
Calibrator Signal
50 MHz CW, -25 dBm
A13 FRONT END DRIVER
10 Mhz
16
REF.
BIT
COUNTER
1/N 1/N
DAC
32 32
N=1-2 N=1-2
YTF TUNE RAMP GENERATOR
48
N=1-2
16
BIT
COUNTER
1/N
DAC
VARIABLE GAIN RAMP GENERATOR
+32v
28v
REGULATOR
block_123_40_43_45
A15 INPUT ATTENUATOR B
2 dB 2 dB 10 dB 6 dB 20 dB 30 dB
W8
W30
14
W29
PRE-SEL OUT
(REAR PANEL)
10 10
W47
W26
(97)
J5 J6 J3 J4 J11
ELECTRONIC
10 kHz
ATTENUATOR
ATTENUATOR
CONTROL
CONTROL
UNPRESELECTED
YTO
MIXER CONTROL
MAIN COIL
DELAY RYTHM
FM COIL
COMP. BIAS/CTRL
PASS THRU
THERMOMETER
FROM LO VIA
10 kHz
MOTHERBOARD
TO 3rd CONVERTER
VIA MOTHERBOARD
SLODA
LEVELING LOOP
GATE BIAS
OPTION 1DS
LOWBAND HI/LO SWITCH
PREAMP
BIAS/CONTROL BIAS
BIAS/CTRL
J8 J9
W31 W49
TO REAR PANEL
28v (SWITCHED)
Bottom Switch
SW1
A19 RYTHM
(OPTION 123)
5 GHz, -35 dBm
2
C
W80 W81
1
5 GHz
J1
W82
A34 MIXER (OPTION 123)
W85
Mixer Control
7
A21 SLODA
J13
W53
LO DISTRIBUTION AMPLIFIER
A18
5.3214 GHz, 12-17 dBm
J7
W25
10
W35
3-7 GHz YTO
PIN ATTEN.
J2
W28
10
W24
Front Panel
RF Input Frequency
W51
YTF
Odd/Even IF
W87
321.4 MHz
YTF Coil
-49 dBm
Driver
(preselector On)
LO 3-7 GHz
(5.3214 GHz, 14 dBm ± 3 dB)
W38
HB Out 321.4 MHz
W84
LO
W83 W88
HIGH/LOW
HI
INT. SENSE
LO
FIRST LO OUT
5.3214 GHz
+ 15 dBm
EXT. SENSE
SAMPLER
OUT
3-7 GHz
-3 TO -8 dBm
[3.9714 GHz
14.5 dBm ± 1 dB]
To A20 Lowband
To Lowband
Top
SW2
Switch
(OPTION 123)
2
C 10
W86
321.4 MHz to
A10 3rd Converter J1
1
321.4 MHz
-51 dBm
Note -
POWER LEVELS BASED
ON THESE SETTINGS:
Mode - Spectrum Analysis
Center Frequency - 5 GHz
Span - 0 Hz.
Input Attenuation - 10 dB
Microwave Preselector - Off
W41