LOW-PASS
FILTER
3dBPAD
10.7 MHz
NV-RAM
DAC
X--AXIS
+11.8V
+18V
SUPPLY
10kHz
RESOLUTION
FILTER
GAIN
CONTROL
--11.8V
SPAN
LOW
VOLTAGE
POWER
SUPPLY
TUNER
SWITCHING
VCO
L--BAND
TUNER
RO-BLANK
300kHZ
RESOLUTION
FILTER
130.5 MHz
BUFFER
TRIPLER
2ndIF
20dB
Y--AXIS
3dB
COMBINER
HELICAL
BAND-PASS
FILTER
360MHz
HELICAL
BAND-PASS
FILTER
130MHz
LOCAL
OSCILLATOR
119.8 MHz
RAMP
GENERATOR MARKER
GENERATOR Z--AXIS
AMPLIFIER
4X
MULT
V
H
FOCUS
INTENS
HIGH
VOLTAGE
POWER
SUPPLY
CONTROLLINE
SIGNALLINE
KEY
SCHEMATICDIAGRAM
NUMBER n
1705A Spectrum Monitor
FRONTPANEL KNOB
7
+40VDC
+15VDC
+5VDC
--15VDC
Z--AXIS
CONTROL
CENTER
FREQUENCY
SWEEP
SPEED
SHAPERS
+18V
(REARPANEL)
VIDEO RESOLUTION INPUT
SPAN/DIV
FRONTPANEL
130.5 MHz
MICRO
PROCESSOR
70MHz
INPUT
IFAMP
8dB
ADC
EPROM
LOG
DETECTOR
NOTCH
FILTER
130.5 MHz
IFAMP
8dB
70MHz TUNER
L-BAND
INPUT
/RO-EN
FULL
VIDEO
FILTER
1
8
580MHz
NOTCH
MIXER
4
4
490MHz IF
/L-BAND
/VFILTER
/10kHz
8
8
1
1
1
6
1
33 3
3
3
33
4
5
5
5
1
2
2
2
2
2
2
22
4
5
5
2
2
8
4
4
4
5
5