Motorola SG 2000 用户手册

A - 2

S p e c i f i c a t i o n s

S G 2 0 0 0 I n s t a l l a t i o n a n d O p e r a t i o n M a n u a l

Parameter

Specific ation

Flatness over passband

±0.75 dB, all ports

Operational tilt (standard)

750 MHz:10 dB ±1 dB (low),12.5 dB ±1 dB (standard),
14 dB ±1 dB (high)
870 MHz: 9 dB ±1 dB (low), 11.5 dB ±1 dB (standard),
14 dB ±1 dB (high) (plug-in equalizers available)

Table A-3 lists the general characteristics for the SG 2000 node:

T a b l e A- 3
SG 2 0 0 0 G e n e r a l c h a r a c t e r i s t i c s

Parameter

Specific ations

AC input voltage

44 Vac through 110 Vac quasi-squarewave

AC bypass current

15 A

Hum modulation

–70 dB @ 15 A bypass current

Operating temperature

–40

C through +60

C (–40

F through +140

Housing dimensions

21.6”(L)

10.6”(W)

11.0”(D), (without bracket)

Weight

Minimum 36 lbs./maximum 42 lbs. (without bracket)

Table A-4 lists the general specifications for the SG2-LR optical receiver:

T a b l e A- 4
S G 2 - L R s p e c i f i c a t i o n s

Parameter

Specific ation

Optical input power
range-recommended

–4.0 dBm to +2.0 dBm

Optical input
power-maximum
recommended

3 dBm

Optical input return loss

40 dB minimum

RF passband

40 MHz through 870 MHz

Gain at 40 MHz

19.5 dB minimum

Flatness

1.25 dB P-V maximum

Tilt

–0.5 dB to +2.0 dB maximum

Equivalent noise input
current

8 pA/Hz

1/2

maximum

Absolute maximum optical input power that can be applied to the optical input connector.

Relative to an ideal photodetector terminated in a 75-ohm impedance.