User Manual

3
Amplitude Modulation
Carrier Frequency:
From 1mHz to 10MHz.
Carrier Waveforms:
All.
Modulation Frequency:
400Hz internal. DC to 20kHz external.
External Modulation:
AM/COUNT IN socket.
Frequency Shift Keying (FSK)
Phase coherent switching between two selected frequencies at a rate defined by the switching
signal source.
Carrier frequency:
From 0.1Hz to 10MHz.
Carrier waveforms:
All.
Switch repetition rate:
DC to 10kHz (internal trigger).
Switching signal source:
Manual (front panel MAN TRIG key) or internal trigger generator.
Frequency List
Step through up to 10 stored frequencies.
Carrier Waveforms:
All.
Frequency List:
Up to 10 frequencies from 1mHz to 10MHz.
Switching Source:
Manual from front panel MAN TRIG key.
OUTPUTS
Main Outputs
Output Impedance:
50Ω and 600Ω (not independent).
Amplitude:
2mV to 20V pk-pk open circuit, (1mV to 10V pk-pk into 50Ω/600Ω) in
four switch selectable ranges with 20dB vernier control within each
range. Amplitude can be displayed in Vpk-pk or Vrms.
Attenuator:
0, -20dB, -40dB, or -60dB.
Amplitude Flatness:
±0.2dB to 500kHz; ±2dB to 10MHz.
DC Offset Range:
±10V. DC offset plus signal peak limited to ±10V from 50Ω/600Ω; CLIP
shows in display when offset plus signal peak exceeds ±10V. DC offset
plus waveform attenuated proportionally by the attenuator.
Resolution:
3 digits for both Amplitude and DC Offset.
SYNC Out
Automatically selected to be either Waveform Sync or Sweep Sync.
Waveform Sync:
A square wave at the main waveform frequency. Symmetry is 50% for
sine and triangle waves at MAIN OUT; for square waves symmetry is
the same as that of the waveform at MAIN OUT.
Sweep Sync: Outputs a trigger signal at the start of sweep to synchronize an
oscilloscope.
Output Signal Level:
Output impedance 50Ω nominal. Logic levels of <0.8V & >3V.
INPUTS
AM In
The AM/COUNT IN socket is set to AM input when EXT AM is selected.
Input Impedance:
40kΩ.
Input Sensitivity:
Approximately 2V peak-peak for 100% modulation.
Maximum Allowable
Input Voltage:
±10V.