The Philips PM 6669 is a compact, high‑resolution reciprocal frequency counter with optional 1.1 GHz HF input, GPIB interface, high‑stability oscillator and rechargeable battery for field use.
The manual covers safety precautions, installation, front‑panel functions, GPIB communication, programming examples and troubleshooting, providing step‑by‑step instructions for setup and operation.
Connect the optional GPIB‑interface connector, set the GPIB address selector, and use the bus commands described in the programming section.