J3 Pin No's |
Wire Colour Code |
Circuit Function |
8553B | 8554B | 8555A | 8556A |
1 | 912 |
0.03kHz Bandwidth |
x |
+20V from Pin 37 |
+20V from Pin 37 |
x |
2 | 913 |
0.1kHz Bandwidth |
x | x | x | x |
3 | 914 |
0.3kHz Bandwidth |
x | x | x | x |
4 | 915 |
1kHz Bandwidth |
x | x | x | x |
5 | 4 |
Phase Lock Compensation |
x | n.c. | n.c. |
Frequency Tune Voltage |
6 |
3 |
Preset Scan Voltage |
x | x |
-5V to +5V Sweep Ramp |
±5V Scan Sawtooth |
7 | 5 |
Linear Compensation Control Voltage |
x | x | x | x |
8 | 6 |
Linear Compensation Control Voltage |
x | x | x | x |
9 | 938 |
Log Ref Level Lamp No 4 |
x | x | x | x |
10 | 945 |
Log Ref Level Lamp No 5 |
x | x | x | x |
11 | 946 |
Log Ref Level Lamp No 6 |
x | x | x | x |
12 | 90 |
Sensing Ground |
x | n.c. |
Ground Return |
x |
13 | 8 |
Blanking for Tracking Generator |
x | n.c. | Blanking | n.c. |
14 | 925 |
0.01kHz Bandwidth |
x | n.c. | n.c. | x |
15 | 902 | +20V | n.c. | n.c. | n.c. |
Sensing for Zero Adjust |
16 | n.c. | n.c. | n.c. | n.c. | n.c. | |
17 | n.c. | n.c. | n.c. | n.c. | n.c. | |
18 | n.c. | n.c. | n.c. | n.c. | n.c. | |
19 | n.c. | n.c. | n.c. | n.c. | n.c. | |
20 | n.c. | n.c. | n.c. | n.c. | n.c. | |
21 | n.c. | n.c. | n.c. | n.c. | n.c. | |
22 | 90 |
Scan Width Ground |
n.c. | n.c. | n.c. | n.c. |
23 |
8 Coax |
3MHz IF | n.c. | n.c. |
n.c. |
n.c. |
24 |
8 Coax |
Ground | n.c. | n.c. | n.c. | n.c. |
25 | 916 |
10kHz Bandwidth |
x | x | x | x |
26 | 927 |
30kHz Bandwidth |
x |
x 917 |
x | x |
27 | 918 |
100kHz Bandwidth |
x | x | x | x |
28 | 923 |
300kHz Bandwidth |
x | x | x | x |
29 | 96 |
Amplitude Calibrate Adjustment |
x | x | x | x |
30 | 957 |
Normal Analogic Line |
x | x | x | x |
31 | 934 |
Scan Voltage to Shaping Circuit |
Scan Voltage to IF 47MHz |
n.c. | n.c. |
Scan Voltage 47MHz LO |
32 | 9 |
Fine Tune Voltage to Shaping Circuit |
Fine Tune Voltage to IF |
47MHz LO Voltage |
47MHz LO Voltage |
Zero Adjust Voltage |
33 | 935 |
Log Ref Level Lamp No 1 |
x | x | x | x |
34 | 936 |
Log Ref Level Lamp No 2 |
x | x | x | x |
35 | 937 |
Log Ref Level Lamp No 3 |
x | x | x | x |
36 | 907 | -10V | x |
x Circuit Error! |
x | x |
37 | 902 | +20V | x |
x Circuit Error! |
x | x |
38 | 956 |
Video Filter Analogic Line |
x | x | x | x |
39 | 958 |
Zero Scan Analogic Disable Line |
x |
to Scan Time Switch |
-10V to IF Section |
x |
40 | 968 |
Log / Linear Sense |
n.c. | n.c. | n.c. | x |
41 | 928 |
0V to 8V Ramp Scan Control to Tracking Generator |
x | n.c. |
Scan Voltage 0V to 8V |
n.c. |
A1 |
9 Coax |
50MHz IF | x | x | x | x |
A2 |
6 Coax |
47MHz Auxiliary Line |
x | n.c. |
47MHz LO |
x |
J3 Pin No's |
Wire Colour Code |
Circuit Function |
8553B | 8554B | 8555A | 8556A |