The LM98 (LM98-A) level meter is a portable battery device designed mainly for choosing and measuring of access network dual cables. It can carry out wide-band measuring in the range up to 2,1 Mhz or selective measurings in the range up to 1,2 Mhz.

Features:

• wide-band level measuring
• selective level meter with selectible bandwidth
• searching for signals on a higher level than set
• measuring and viewing signal spectrum
• loop resistance measuring
• bleeder resistance measuring with disconnected loop
• line capacity measuring
• memory for storing the most frequently used measurings
• saving of measuring results
• possibility of saving boundary values for quick "suitable/not suitable" evaluation
• automatic control of the programmable SG98 generator on the tested line
• possibility of automatic calibrating with SG98
• PC cooperation

LM98 (LM98-A) can measure line frequency parameters, d-c line resistance, bleeder resistance and the line capacity.

LM98 (LM98-A) can measure the total level of unweighted voltage and search the frequency spectrum for the most powerful sources of unweighted voltage.

In the autonomous mode the LM98 (LM98-A) is controlled from the foiled keyboard. The measuring results are shown on the four-line display.

The device is very user-friendly.

SG98 (SG98c) can be connected to a PC with a galvanically isolated output. The PC can be used to enter measuring orders and the PC screen to display the measuring results.

LM98 (LM98-A) features ten memories for programming measurement sequence including boundary values. It suffices to launch the appropriate programme to proceed.

Measuring results can be stored in the memory or printed out as a result report.

Remote signal generator SG98 controlled on the measured line can be used when measuring frequency characteristics

BASIC TECHNICAL PARAMETERS	LM98	LM98-A
feeding voltage	44 pc NiCd accumulator type AA or 220V for mains feeding
operating time	min. 2 hours with 950mAh NiCd accumulators
loop resistance measuring	5Ohm up to 2000Ohm
bleeder resistance measuring	10kOhm up to 1MOhm
line capacity measuring	10nF up to 2µF
frequency range:wide-band measuring	50Hz up to 2,1MHz
selective measuring	50Hz up to 1,2MHz
minimal bandwidth: band up to 4kHz	20Hz	10Hz
minimal bandwidth: band up to 40kHz	200Hz	100Hz
minimal bandwidth: band up to 1,2MHz	800Hz	320Hz
measured levels	-90dB to +12dB/dBm
resolution	0,1dB
measured quantities	dB, dBm, dBm0, mV
result evaluation	RMS
input	symmetrical 3 pole non-symmetrical BNC
input impendace	>10kOhm, 600Ohm, 135Ohm or 150Ohm, 75Ohm
display	digital, on a connected PC
memory	0 to 9 for most frequently used measurings, saving of measuring results 0 to 9
size	app. 120x250x45 mm