INTRODUCTION The Wavetek Models 3001/3002 are rugged, completely solid-state Signal Generators covering the frequency range of .001 or 1 to 520 MHz. The output can be amplitude or frequency modulated, and the level can be set between + 13 and -137 dBm. 1.1.1 FREQUENCY CHARACTERISTICS The frequency of the instrument is set via 6 front-panel Lever/indicator switches which yield a resolution of 1 kHz. in addition, remote frequency programmability is standard. Series 3900 programmers are available to facilitate semiautomatic or GPIB programming of both frequency and output level. The accuracy of the instrument is based on a crystal-controlled oscillator that serves as a stable frequency reference that enables the instrument to provide high stability signals to an accuracy of 0,001% over its specified frequency range. This accuracy includes possible errors due to short term drift, long term drift, incidental FM, and variations due to line voltage changes and temperature changes. With the FREQUENCY VERNIER out of the CAL position, the frequency is accurate to 0.001% ±10 kHz. The accuracy of the instrument can be improved by using the optional External Reference input or the optional Internal/External Reference or High Stability Internal Reference. An Auxiliary RF Output option is also available to drive a counter. (See Section 1.3, Options.) 1.1.2 MODULATION • These instruments also feature both internal and external amplitude and frequency modulation capabilities. Internal modulation frequencies of 400 Hz and 1 kHz are standard. Sn the FM mode of operation, peak deviations to 100 kHz are attainable. In the AM mode, amplitude modulation to 90% is attainable. With the MODULATION MODE switch in the AM position and the MODULATION FREQUENCY switch in the DC position, the output amplitude can be varied by the MODULATION FM/AM control. This provides a reference attenuator for variation of a signal level around a specific point of interest. This operation can also enable the user to obtain greater than 20 milliwatts of power over portions of the band. The frequency can also be continuously varied with this control over a 100 kHz range. 1.1.3 OUTPUT LEVEL FREATURES The output power is indicated on a front-pane! meter calibrated in both dBm and VRMS. A fifteen-position, 10 dB/step Attenuator used in conjunction with an 11 dB VERNIER control provides the user with a range of +13 dBm to -137 dBm. Two programmable attenuator options (1A and 1B), see Section 1.3.1} are available. The calibrated output of each instrument is leveled to within ±0.75 dB across the complete frequency range of the instrument.