HP 5246L / Agilent 5246L Electronic Counter with 5253B Heterodyne Frequency Converter

<p>5246L Frequency Range: DC to 50 MHz
Frequency: 1 MHz
Output Frequency: 1 MHz, &gt;3 V p-p into 1 kohm
External Input: 1 V rms into 500 ohm
5253B Frequency Range: 50 MHz to 512 MHz
Input Impedance: 50 ohm.</p><p>&#160;</p>