4001A - 

Models 4001A and 4003A are 4 MHz sweep function generators. The sweep function offers linear or log sweep with variable sweep rates and widths. The model 4003A has the addition of a 20 MHz 5-digit external frequency counter.

Features:

Generates Sine, Triangle, & Square waveforms from 0.5 Hz to 4 MHz

20 Vpp output into open circuit (10 Vpp into 50 O)

TTL output <25 ns

±10 V DC offset

Variable amplitude output plus 20 dB attenuator

Kensington security slot

cUL approved
4003A Additional Features

CMOS variable level output

5-digit LED display

Voltage Controlled Frequency (VCF) input