Tektronix 495 495P spectrum Analyzers. 495P Programming Manual. Tektronix Part # 070-5082-00. Tektronix Part # 070-5086-00. Tektronix Part # 070-5084-00. Tektronix Part # 070-5085-00. TROUBLESHOOTING OSCILLOSCOPES ( TEKTRONIX PUBLICATION ).
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