wiltron 560a :
frequency range: 1 mhz to 34 ghz, depending on the swr autotester and detectors used (sold separately)
channels: three (a, b, r) with push-button selection of a, b, r, a-r, and b-r. two channels are displayed simultaneously
dynamic measurement range and sensitivity: a and b with detectors (sold separately): 66 db (+16 dbm to -50 dbm); a and b with swr autotester (sold separately): 66 db (+16 dbm to 50 dbm); r with detector (sold separately): 46 db (+16 dbm to -30 dbm)
offset control: positioning of a and b traces is independently and continuously adjustable over >±65 db range. when trace is on reference line, power is displayed in dbm on 3 digit led readout with 0.1 resolution. offset is displayed in db relative to a 0 db reference level
resolution: independent control for a and b in steps of 0.2, 0.5, 2.5, 10 db per division
store trace: stores displayed trace(s) in 1024 point memory
average: averages data in memory with input test data and displays the result
subtraction: subtracts data in memory from input test data and displays the result
recall: displays stored data
uncalibrated sweep indicator: lights when external sweep generator sweep rate is too fast for memory
real time display mode: horizontal sweep is synchronized with ramp from external sweep generator
refresh: steady, non flickering display is provided regardless of sweep generator sweep rate. vertical resolution is 512 points for single or dual traces
refresh hold: updating of display data is stopped, display is frozen
x-y plot (real time): provides pen lift, vertical, and horizontal signals for x-y plot, coincident with external sweep generator ramp
x-y plot (refresh): display is froze
