Function Generator GFG-3015

GFG-3015 is a functional Function generator that applies Frequency feedback control system technique and can generate high frequency accuracy with high resolution. Its main signal source can generate waveforms including sine wave, square wave, triangle wave, and ramp wave. There are additional features listed as follows:

—- Output Waveforms of Sine, Square, Triangle, Ramp, Pulse, AM, FM,
  Sweep
- Trigger and Gate or Burst
—- Wide output frequency range 0.01Hz ~ 15MHz
—- High frequency accuracy 0.02% ± 5 count
—- Maximum frequency resolution 10mHz
—- Dual displays indicate frequency and amplitude or other necessary
  information
- Built-in 6-digit INT/EXT Function Counter and up to 150 MHz
-— INT/EXT AM/FM Modulation with internal modulation signal output
- LIN/LOG Sweep Mode with internal sweep signal output
-— VCF of 100:1 EXT Frequency Control
— - SYNC Output
— - TTL Output
-  Synchronization GCV Output.
- — Variable DC Offset Control
— - Output Overload Protection
— - RS232 Interface Standard

Here you find 19 models, 18 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Good Will Instruments Co., Ltd.; Taipei