quick overview :

R F  Generator 

Technical Specifications                

Frequency : 100KHz ~ 150MHz (Harmonic 450MHz) INT & EXT Modulation : AM, FM Internal Modulation : 1 KHz audio signal External Modulation : Input resistance less than 600Ω, Input amplitude less than 2.5V Output amplitude : 0 ~ 50mVrms, attenuation : 20dB

Audio Signal Generator :

Frequency : 1KHz ±10% Distortion : 1% Output amplitude : Micro volt to 1Vrms

FM Stereo Signal Generator :

Frequency : 88 ~ 108 MHz External modulation : Input resistance less than 600Ω, Input amplitude less than 15mV

Frequency Counter :

Frequency range : 10Hz ~ 100Mhz (EXT L);  100MHz ~ 1.3GHz (EXT H) Sensitivity : ≤100mVrms Max. Input Voltage : 3Vrms Accuracy : ±(0.005%Rdg + 1 digit) Input Impedance : 1MΩ(EXT L)  50Ω (EXT H)