HP 8562E, Service Manual

Page: 63 / 482

3. IF Adjustment
11. Move the positive DVM test lead to (this is a resistor-lead type of test point).
12. Adjust LC CTR 4 using the procedure in steps 4 through 6.
Table 2-6. Factory-Selected LC Filter Capacitors
CTR Adjustment Fixed Factory Select Capacitor
LC CTR 1
LC CTR 2
LC CTR 3
LC CTR 4
Table 2-7. LC Factory-Selected Capacitor Selection
DVM Reading (V)
Currently Loaded Capacitor Value
Replace Replace Replace Replace
Replace Replace Replace
6.8 with: 8.2 with:
10
with: 12 with: 15 with: 18 with: 20 with:
0 to 1.5
* *
* * * * *
1.5 to 2.5 18 18 * * * *
2.5 to 3.5 15 15 18 18 * * *
3.5 to 4.5 10 12 15 15 18 * *
4.5 to 5.5 8.2 10 12 15 18 * *
5.5 to 6.5 No change No change No change No change No change No change No change
6.5 to 7.5 No change No change No change No change No change No change No change
7.5 to 8.5 * 6.8 8.2 10 12 15 18
8.5 to 9.5 * * 6.8 8.2 12 15 18
9.5 to 10 * * 6.8 8.2 10 12 15
* Indicates a condition that should not, exist; suspect broken hardware.
13. On the spectrum analyzer, press 1, (MHz), and
14. Move the positive DVM test lead to
15. On the spectrum analyzer, press IF STATE. Wait for the IF ADJUST STATUS
message to disappear before continuing to the next step.
16. Read the voltage displayed on the DVM. If the voltage is less than $6.06 Vdc, turn
XTAL CTR 1 clockwise. If the voltage is greater than i-6.26 Vdc, turn XTAL
CTR 1 counterclockwise.
17. Repeat steps 15 and 16 until the voltage reads Vdc
Adjustment Procedures 2-23