50Hz to 5MHz Sensitivity < 40 uV at 1 kHz antiquated
This 1212A unit null detector is a broadband balance indicator for ac bridge measurements from 50 Hz to 5 MHz. With the 1212-P3 RF Mixer and a local oscillator, its range can be extended to 60 MHz as a hetero dyne detector. The instrument consists of a three-stage, broadband amplifier. Germanium-diode clippers are used between stages to obtain the quasi-logarithmic response. The output meter has a linear scale. Earphone terminals provided. Sensitivity: Less than 40 uV at 1 kHz for 1% of full scale. Power Required: 1203-B (or 1203-B018) Unit Power Supply. Hum and Noise Level: Hum, 20 uV, broadband noise, 30 uV. Input Terminal: Locking CR874 coaxial connector. Accessories Supplied: Power-supply plug.Accessories Available: 1212-P1 and -P2 Filters, 1212-P3 RF Mixer. GR874 patch cords for input connection.