: Check if the output attenuation buttons are clicked into a extreme position. Ensure the BNC cable is snug and not internally shorted.
: A dedicated TTL sync output for triggering other instruments like oscilloscopes. TEquipment Manual Resources
The B801 is functionally identical to the Mastech M9803 and Voltcraft M-4660 . If you can't find the Protek manual, those will work too. protek b801 manual link
Voltage Controlled Frequency capability (100:1 tuning range) Dimensions: 3.8" H × 11.5" W × 12.5" D How to Use the Protek B801
Connect the unit to an appropriate AC power source ( : Check if the output attenuation buttons are
Allows for adjustment of the waveform symmetry from 1:1 to 4:1. DC Offset: Includes a variable DC offset control from (open circuit).
The official GSI-Protek site includes support for various digital oscilloscopes, function generators, and handheld multimeters. Overview of the Protek B801 Features DC Offset: Includes a variable DC offset control
If your target circuit requires a digital bias (such as testing TTL or CMOS logic steps), use the DC Offset control: Pull the knob outward to engage the circuit.
The Protek B801 balances versatility with clean output. Its performance parameters make it ideal for audio testing, sensor simulation, and circuit prototyping: Specification Details 0.02Hz to 2MHz split across 7 overlapping rotary ranges. Output Waveforms Sine, Square, Triangle, Pulse, and Ramp variants. Built-in Counter
