LG Electronics LKA-200 manual DC Characteristics

Issue 1 Jan 2006 LKA-200

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6.2.3 Frequency Deviation

The accuracy for each of the two fundamental frequencies compare to DTMF frequency table.

Required result: Less than + 1.5 %

6.2.4 DTMF Signal Duration
Required results:
Signal duration time :		More than 65 ms
Inter-digit time	:	More than 65 ms

6.2.5 DTMF Total Harmonic Distortion

Required result: Less than –20 dB at 20 mA current condition.

6.2.6 Pulse dialing (option)
Required results:
Pulse speed	:	10 + 0.8 pulse per second
Make / Break ratio		: 40:60 + 3 % for OJ23 (33:66 for OJ12)
Break resistance:		More than 200kohm
Interdigit pause		: More than 600 ms

6.2.7 Flash time

Required results: 100, 300, 600 ms (depends on flash jumper option).

6.3 DC CHARACTERISTICS

6.3.1 On-hook DC resistance

Required result: More than 5 Mohm at 200 V dc.

6.3.2 Off-hook DC resistance

Required result: Less than 8 V at 20 mA

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