APPLICATION OF THE INSTRUMENT The 6041 SLM is a portable field or bench instrument designed to make precision measurements of both level and frequency on frequency division multiplex (FDM) equipment baseband signals. Although its primary application was intended to be on high-density long-haul microwave systems, the 6041 SLM may be employed on any communications equipment requiring selective/wide band level or frequency measurements. 1.2 ELECTRICAL FEATURES The key electrical features of the 6041 SLM are as follows: • Level Accuracy — ±0.2 dB • Auto Level Ranging • AFC Tuning in the Selective Frequency Mode • Precision Frequency Counter • Analog Tuning Meter • Level Out • LCD Digital Displays • Field Operation