Agilent Technologies 856290216 Factory-Selected Xtal Filter Capacitors, A5T200 Xtal CTR

3. IF Bandpass Adjustment

Note	If the range for the XTAL CTR adjustment is insufficient, replace the
	appropriate factory-selected capacitor as listed in Table 2-8. To determine
	the correct replacement value, center the XTAL CTR adjustment, and press
	AD.? GUM IF STATE. After the IF ADJUST STATUS message disappears, read
	the DVM display. Choose a capacitor value from Table 2-9, based on the
	DVM reading and the presently loaded capacitor value. Table 2-10 lists a few
	capacitor part numbers.
Caution	Turn the spectrum analyzer off by pressing LLINE) to the off position before
	removing or replacing any shield.

18.Move the positive DVM test lead to A5TP8.

19.Adjust A5T202 XTAL CTR 2 using the procedure in steps 15 through 17.

20.Move the positive DVM test lead to A5TP3.

21.Adjust A5T500 XTAL CTR 3 using the procedure in steps 15 through 17.

22.Move the positive DVM test lead to A5TP4.

23.Adjust A5T502 XTAL CTR 4 using the procedure in steps 15 through 17.

Table 2-8. Factory-Selected XTAL Filter Capacitors

XTAL CTR Adjustment			Fixed Factory Select Capacitor
A5T200 XTAL CTR 1			A5C204
A5T202 XTAL CTR 2			A5C216
A5T500	XTAL CTR	3	A5C505
A5T502	XTAL CTR	4	A5C516

Table 2-9. XTAL Factory-Selected Capacitor Selection

DVM Reading (V)			Currently Loaded Capacitor Value (pF)
		Replace	Replace	Replace	Replace	Replace	Replace
		15 with:	18 with:	20 with:	22 with:	24 with:	27 with:
0 to 1.5		*	*	*	*	*	*
1.5	to 2.5	27	*	*	*	*	*
2.5	to 3.5	22	27	27	*	*	*
3.5	t o 4.5	18	22	24	27	27	*
4.5	t o 5.5	18	20	22	24	27	*

5.5to 6.5 No change No change No change No change No change No change

6.5to 7.5 No change No change No change No change No change No change

7.5	to 8.5	*	15	18	18	22	24
8.5	to 9.5	*	15	15	18	20	24
9.5 to 10		*	*	15	18	20	24

* Indicates a condition that should not exist; suspect broken hardware.

2-24 Adjustment Procedures