HP 8340B Manual

Also see for 8340b: Operating guide Manual Manual Operating instructions

5-3. 100 MHz VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR (VCXO),A30ReferencePerformance Test: NoneService Section: Reference — M/N LoopsDescriptionThe open loop frequency and maximum power output of the 100 MHz VCXO is centered around 100MHz. The 400 MHz signal is adjusted for maximum 400 MHz output with minimum spurious output.The 400 MHz output is set to —10 dBm by selecting proper resistor values for the attenuator networkA30R67, R68, and R69.DIGITAL VOLTMETERSPECTf^— „„m ao caoo DOonaaa =°° ,~» t=t 0 0 0 aaaaaa ^aa •^ 000000:aaac3a aad) OQ '—' a 0 D a0FREQUENCY T|I,|REFERENCE | '110MHZ) |(HEAR PANEL) 1EXT FREQSTANDARD(REAR PANEL)f==MU ANALYZER0 didi a a• •&(=i & a•dic-i a a09-Bs^o<-^-T.aa61=1adi= Cad;a o0'®PUT<<ADA3D1r^LOP0»PTERW VOLTACWER SUPP»El00 683ELYDUTA30TP1(TUNE)A30J2A30Wt'00000010a o-D-nlBl^0 D-D •a D-O- •1a- o o- •D.a-D. •o- o o- ruoOoloa a a Bo-o o o iruODD a Hoaao •oa oo Boooo UBII/Figure 5-5. 100 MHz VCXO Adjustment SetupEquipmentSpectrum Analyzer................... .Digital Voltmeter.......................Low-Voltage DC Power Supply....... ,.BNC to SMB Snap-On Test Cable (2 required)Adapter, SMB Snap-On Male-to-Male ,...-......... HP8566B...... HP 3456A........ HP 6294AHP P/N 85680-60093. . HP P/N 1250-0069Procedure1. Position DUT into the Test Position as shown in Figure 5-5 with the bottom cover removed. On theDUT's rear panel, disconnect the BNC cable connected between I NT and EXT Frequency Stan¬dard connectors, set INT/EXT switch to EXT, then connect a BNC cable from EXT connector toSpectrum Analyzer's Frequency Reference (10 MHz) rear-panel connector. Allow the test equip¬ment to warm up for one-half hour.HP 8340B/41B Adjustments