MRV Communications TS800/155, TS700/155, TS700/100, TS700/G user manual Appendixb

M R V C o m m u n i c a t i o n s , I n c . – I n s t a l l a t i o n M a n u a l

APPENDIXB Digital Readout vs. Distance

TS700/155

TS700/100

TS800/155

These tables are only intended to give you an idea of what digital readout you could expect according to the distance to link.

D= Distance [m]

R= Reading (Digital readout)

D	50	100	150	200	250	300	350	400	450	500	550	600	650	700
R	560	520	420	360	300	240	180	140	120	100	80	60	40	30

D	50	100	200	400	500	600	800	900	1000	1100	1300	1500	1700	1900
R	960	760	520	410	380	330	210	170	130	100	70	40	35	25

Actual reading may be greater or up to 15% lower.

TS700/G	D	50	100	150	200	250	300	350	400	450	500	550	600	680	1000
	R	1150	1150	1110	1020	940	880	800	730	640	580	520	470	400	250

Actual reading may be greater or up to 15% lower.

NOTE: with the Transmitter in “Attenuated” mode for distances under 150m (DIP switch toggle 1 OFF), the DVM should show readings varying from 800 to 1150.

A note on the Digital Readout Charactersitics of the TS700/G

The digital readout of the TS700G works under a different principle from previous TereScopes in the series. The readout level is derived from the actual light level at the photodetector, much like a standard optical power meter. For this reason, background light entering the lens will also contribute to the reading. A typical reading with no signal on a sunny day would be 030 to 080. This will sum with the signal strength, so outside the reading at the minimum threshold would be higher than the reading for the corresponding signal in a bench test. Due to the AGC function, for higher signals the offset in the reading gradually becomes negligible. All this has no effect on the actual link performance.

Please note, however, that the Air Rx LED is not affected by background light, and is purely a function of the received data level. So even with high background light reading, the Air Rx LED will not light in the absence of signal.

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