| LogiMetrics RF Signal Generator, ( Model 921A shown). 50khz - 80mhz. Digital display : some units used (6) seven segment LED displays, some used (3 switchable to 6) or in some cases (6) Nixie (r) tubes.Various functions depending on model, but those functions included: Internal (metered) AM (400 &1000hz) modulation, external AM and FSK modulation capability, accurate resistive step attenuator, metered RF output from +20dbm to -120dbm. Continuous analog tuning: (7 discrete and overlapping frequency bands), "course" ( two Jackson Brothers vernier units in series), plus a "fine tune" front panel mounted 10 turn potentiometer. Some units (Model 925), feature a "frequency lock" function in which the output is phase locked to the internal (some models had an "external time base input" capability) frequency time base. All solid state units. |
