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VOLTAGE POINT
Q6B
Q6C
Q6E
Q7B
Q7C
Q7E
Q8B
Q8C
Q8E
U1 Pin 1
U1 Pin 2
U1 Pin 3
U1 Pin 5
U1 Pin 6
U1 Pin 7
U2 Pin 2
U3 Pin 6
*Voltage readings taken with oven supply voltage of 20V dc and insulating foam and cover removed.
Voltages are approximate and will vary slightly from unit-to-unit.
Table 8-4. Oscillator Section Normal Voltages (see Notes 1, 2, 3)
VOLTAGE
POINT
C3/R3
CR5/C13
CR3(C)
Q1(B)
Q1(C)
Q1(E)
Q2(B)
Q2(C)
Q2(E)
Q3(B)
Q3(C)
Q3(E)
Q4(B)
Q4(C)
Q4(E)
Q5(B)
Q5(C)
Q5(E)
Q9(B)
Q9(C)
Q9(E)
NOTES:
1.
All voltages taken with 12V oscillator supply.
2.
Voltages are approximate and will vary slightly from unit-to-unit.
3.
All ac voltages are sine waves except Q2(E) and Q3(E).
4.
This dc voltage may be measured with a standard dc voltmeter. All other voltages should be measured with an
oscilloscope and high impedance probe to minimize circuit loading.
5.
Waveform is
6.
Waveform is slightly flattened on the bottom.
7.
This is the AGC voltage. Value shown is nominal with oscillator operating. If the oscillator is not oscillating, the
AGC voltage will be -+2.5V.
8.
Measure both ac and dc voltages with an oscilloscope and a high impedance probe to minimize circuit loading.
9.
AC voltage at Q9(C) measured with 50-ohm load on the output.
Table 8-3. Oven Circuit Voltages·
OVEN AT
OPERATING TEMP.
1.6
11.4
1.
12.5
20.
11.4
1.
11.4
.07
8.9
.07
.2
4.
4.
3.3
10.
3.5
NORMAL
VOLTAGES
AC (p-p)
1 to 4
-
0
1
0
.9
0
2.7
.06
2.7
0
2.4
0
0
0
2.7
0
2.8
2.8
5.1
2.5
OVEN COLD (JUST
AFTER TURN-ON)
2.
11.4
1.3
12.7
20.
11.4
1.3
11.4
.23
1.8
.23
.23
4.1
4.1
4.8
10.
19.0
DC
-
-1.5
6.3
.75
5.5
.03
2.7
5.6
2
5.6
11.8
4.9
6.3
10.3
5.6
3.1
11.8
2.6
2.8
11.8
1.9
Model 10811A/B
RT1
GROUNDED
.25
11.4
0
11.9
20.
11.4
0
11.4
0
8.9
0
.2
3.8
3.8
1.5
10.
.5
REMARKS
Note 8
Notes 4 and 7
Note 4
Note 8
Note 4
Note 8
Note 4
Note 8
Notes 4 and 5
Note 8
Note 4
Notes 4 and 6
Note 4
Note 4
Note 4
Note 8
Notes 8 and 9
Note 8
Note 8, 9
Note 8, 9
Note 8
61
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