Performance Tests - Verifying Specifications 1Keysight 53147A/148A/149A Assembly Level Service Guide 31Test 1: Channel 1 Frequency SensitivityThis set of tests verifies the frequency-sensitivity specifications of Channel 1 of theKeysight 53147A/148A/149A’s Frequency Counter.Equipment RequiredKeysight 3325A/B SynthesizerKeysight 83650B SynthesizerKeysight 437B Power MeterKeysight 8487A/D Power SensorKeysight 11730A Power Sensor Cable (provided with 53147A/148A/149A)Keysight 11667C Power SplitterKeysight 8490D (Opt. 020) 20 dB AttenuatorKeysight 1250-2015 BNC (m) to SMA (f) AdapterKeysight 11904A 2.92 mm (m) to 2.4 mm (m) AdapterKeysight 10100C 50 Ω Feedthrough TerminatorKeysight 10503 Series Coaxial Cable (BNC m to m)2 mm (m) to 2 mm (f) Cable (2)Test 1a: 10 Hz to 20 MHz Frequency Sensitivity1 Connect an Keysight 10503 Series Coaxial Cable between the reference outputconnector on the Keysight 3325A/B Synthesizer and the instrument’sReference 10MHz connector.2 Connect an Keysight 10100C 50Ω Feedthrough Terminator to the Counter’sCHANNEL 1 connector.NOTE – To ensure that the test results are valid, the instrument and the testequipment should be powered on for at least 30 minutes prior to beginningthe tests. This allows the internal temperatures of the equipment to stabilize.– These tests are appropriate for the Keysight 53147A, 53148A, and 53149A.– If the Keysight 3325A/B Synthesizer or the Keysight 83650B Synthesizerreference output is not adequate to drive the 53147A/48A/49A, connect thecable from the Synthesizer to the Reference 10 MHz connector on the backof the 53147A/48A/49A, and set the 53147A/48A/49A to use the internaloscillator.
