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 |