If amplifier <2, Resolution filter & log detector, 10 khz filter – Tektronix 1705A User Manual
Page 200
R136
150.0
+11.8V
VISUAL AID
U25
TOP VIEW
7
9
11
FL2 VISUAL AID
1
6
TOP VIEW
T1
<1>
G2
R201
267.0
136--- BPF
NOTE: PINS 13--- 16 ARE THE MOUNTING
PINS FOR THE PART.
2
3
4
5
130 MHz
IF TUNING
6
1
3
4
2
5
T1
T--- 1907
C
1
1
1
C
2
9
C
3
5
IN
1
OUT
7
GND
15
GND
16
GND
13
GND
14
N
C
4
FL2
1
4
5
FL1 VISUAL AID
TOP VIEW
50 OHM
C54
.001UF
+11.8VF
1
3
5
7
TEST
ONLY
2
4
6
8
TOP VIEW
2
4
6
8
7
5
3
1
U25
SBL--- 1
1 2 3 4
J6
P6
6.2V
10.7MHz IF
R146
301.0
R141
301.0
R145
17.4
C33
.01UF
C32
4700PF
C31
.01UF
C34
.01UF
2
7
1
3
8
4 5 6
U22
NE5205
VR3
TEST
ONLY
R137
221.0
C35
.01UF
1 2 3 4
J5
P5
20dB GAIN
120 MHz
BUFFER
50 OHM
C39
.001UF
Q11
R153
301.0
+11.8VF
R169
28.0
R164
28.0
Q13
Y2
119.8MHZ
C42
15PF
L4
.141--- .159UH
R173
750.0
L17
360NH
C101
12PF
L18
24NH
6
8
9
TRIPLER
TUNING
R181
75.0
C55
1--- 3.5PF
C60
200PF
C50
1PF
L6
45NH
Q12
2
4
6
8
VISUAL AID
NOTE: PINS 13--- 16 ARE THE MOUNTING
PINS FOR THE PART.
2
10
12
TOP VIEW
+6dBM
360 MHz
1
3
5
7
U28
C63
200PF
2
4
6
8
7
5
3
1
U28
SBL--- 1X
GND
13
GND
14
GND
15
GND
16
C
1
2
C
2
9
C
3
8
OUT
6
IN
12
N
C
1
0
FL1
130 MHz
BUFFER
75 OHM
L16
505NH
C85
.001UF
+11.8V
<1>
G5
590 MHz
75 OHM
C72
680PF
C71
680PF
1
3
4
2
U31
MAR--- 4
W13
6.3CM
L12
15NH
R206
243.0
R207
243.0
C69
1--- 5.4PF
L11
15NH
480--- IF
50 OHM
TRIPLER
OUTPUT TUNING
R187
243.0
C59
470PF
--- 11.8V
FREQ
ADJUST
SHIELD
C41
47PF
R182
100.0
R174
2.10K
C61
33UF
C36
33UF
--- 11.8V
TEST SELECTABLE
RANGE = 2.21K--- 3.32K
R163
2.21K
C43
470PF
R165
301.0
R166
17.4
R154
301.0
R170
806.0
C51
.001UF
<4>
C2
R208
14.7K
R218
10.0K
C88
200PF
LOG
+11.8V
R219
15.0K
Q25
Q24
+11.8V
R203
243.0
R202
243.0
C74
.1UF
+11.8V
--- 20dBm MAX
TEST
ONLY
1
2
3
4
J10
P10
300 KHz
RESOLUTION FILTER & LOG DETECTOR
R172
100.0
L7
210UH
C48
.1UF
C53
.1UF
L3
210UH
NOTCH
R156
10.0K
13
12
U23F
7406
Q9
R171
100.0
R155
3.32K
R149
10.0K
+11.8V
+11.8V
--- 11.8V
H2
<5>
/10KHz
11
10
U23E
7406
9
8
U23D
7406
R167
3.32K
Q10
R157
10.0K
R150
10.0K
R138
10.0K
C47
.1UF
+11.8V
+5V
+11.8V
C46
.1UF
CR23
CR26
GAIN
R183
100.0
R175
100
C57
.1UF
C56
.1UF
1
3
4
2
U29
MAR--- 4
CR27
L8
210UH
C58
.01UF
CR28
C68
.01UF
C70
.01UF
SHIELD
SHIELD CAN 202--- 0196--- 01
L14
1.95UH
C87
98PF
R196
340.0
C73
.01UF
FL3
FL4
C83
.047UF
NC
NC
LMTR IN
5
LMTR BIAS
6
LMTR BIAS
7
QUAD IN
9
QUAD BIAS
8
METER
12
DET OUT
11
DET OUT
10
+COMP
15
--- COMP
14
IF VCC
4
COMP VCC
2
IF GND
3
COMP GND
1
CARRIER
13
DATA OUT
16
U32
MC13055
C82
.047UF
L15
64UH
R222
15.0K
--- 11.8V
NC
NC
NC
NC
NC
NC
NC
C81
.01UF
C100
.001UF
+5V
CR29
L10
210UH
R195
681.0
C67
33PF
CR30
10 KHz FILTER ADJUST
L9
1.95UH
C62
5--- 25PF
C66
40PF
C52
9--- 45PF
Y3
10.7MHZ
Y4
10.7MHZ
C64
9--- 45PF
10 KHz FILTER
CR25
CR22
L1
210UH
R148
681.0
L2
210UH
C37
.1UF
L5
1.95UH
C44
33PF
C45
40PF
R147
100.0
C38
.1UF
--- 11.8V
1705A SPECTRUM MONITOR
IF AMPLIFIER <2>
PART OF A3 MAIN BOARD
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com