HP TM 11-6625-2779-14&P Function Switch Resistance Values, Function Input Jacks DIAL/AC MON Jacks

Model 3555B Section V

Table 5-8. FUNCTION Switch Resistance Values

NOTE

The following resistance measurements were made with C1 shorted. Be sure to remove the short after completion of your measurements.

FUNCTION		INPUT JACKS			DIAL/AC MON JACKS
	Tip to Ring		Tip to Ground		Ring to Ground
	BRDG	TERM	BRDG	TERM	BRDG	TERM
DIAL BAT
NG	80.4 kilohms	80.4 kilohms
NG HOLD	80.4 kilohms	700 ohms
VF/Nm
900 BAL		900 ohms			DIAL JACKS, resistance is
900 BAL HOLD		400 ohms			infinite Tip to Ring, Tip to
					Ground and Ring to
600 BAL		600 ohms			Ground on all functions.
600 BAL HOLD		350 ohms
CARRIER
600 BAL		600 ohms
600 BAL HOLD		600 ohms
135 BAL		135 ohms
135 BAL HOLD		135 ohms
75 UNBAL, to Ground		BRDG:	100 kilohms,		-30dBm thru +30dBm ranges
			120 kilohms,		40dBm Range
			400 kilohms,		-50dBm thru -80dBm ranges
		TERM:	75 ohms

b.With a 6.2mV rms signal at XA3 pin 9, measure the signal at XA1, pin 6 or at the AC MON jacks. This signal should be 270mV rms ± l10o. If not, check A3Q6

through A3Q10 and associated components, using the dc levels indicated in Figure 7-5.

c.If a 270mV rms signal appears at the AC MON jacks, check the detector circuit (A3Q11 through A3Q17).

5-39. FACTORY SELECTED VALUES.

5-40. Table 5-11lists all the factory selected components in the Model 3555B, along with the purpose of each. Nominal values are shown on the schematic diagrams in Section VII and in the parts list, Table 6-1.

5-15