Preliminary Data Sheet #: SG027

Page 3 of 10

Rev: 02

Date: 03/15/02

© Copyright 2002 The Connor-Winfield Corp.

Input Selection / Output Response

Table 5

All SCG2500 Models

INPUTS

OUPUTS

Reset/

Oscillator

8 kHz

Notes

Tri-State

SEL

AB

REF

A

REF

B

FR

FR

status

Alarm

Output

Output

1

X

XXXTS

TS

FR

TS

0

X

X

X

1

1

1

FR

FR

0

0

A

A

0

0

0

LRA

LRAD

0

1

NA

A

0

0

0

LRB

LRBD

0

0

NA

A

001

U

U

5.0

0

1

A

NA

001

U

U

5.0

0

0

A

NA

0

0

0

LRA

LRAD

0

X

NA

NA

0

1

1

FR

FR

NOTES:

1.0

Requires external regulation

2.0

Externally selectable via Input Select AB

3.0

From a 20 ppm offset in reference frequency

4.0

Entry into Free Run doesn’t meet requirement for initial 2.33 seconds of self-timing

4.1

If the selected reference is removed, system response to the ALARM must be less than 10µs

5.0

On alarm assertion, switch references. If alarm is still active, force Free Run

TS = Tri-State

U = Unstable

FR = Free Run

LRAD = Locked to Ref A and divided down

LRA = Locked to Ref A

LRAB = Locked to ref B and divided down

LRB = Locked to Reb B

X = Don’t care

Output Jitter Specifications

Table 4

All SCG2500 Models (Ver. 2)

Jitter BW 10 Hz - 1 MHz

SONET Jitter BW 12 kHz - 20 MHz

Frequency (MHz)

pS (RMS)

m UI

pS (RMS)

m UI

1.544

30 Typ.

0.046 Typ.

4 Typ.

0.006 Typ.

2.048

30 Typ.

0.061 Typ.

4 Typ.

0.008 Typ.

19.44

10 Typ.

0.194 Typ.

1 Max., 0.5 Typ.

0.019 Max.

20.48

10 Typ.

0.205 Typ.

1 Max., 0.5 Typ.

0.020 Max.

34.368

10 Typ.

0.344Typ.

1 Max., 0.5 Typ.

0.034Max.

44.736

10 Typ.

0.447Typ.

1 Max., 0.5 Typ.

0.045 Max.

51.84

10 Typ.

0.518 Typ.

1 Max., 0.5 Typ.

0.052 Max.

77.76

10 Typ.

0.778Typ.

1 Max., 0.5 Typ.

0.078 Max.