EndRun Meridian II, Руководство пользователя

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M e r i d i a n I I U s e r M a n u a l 208
A P P E N D I X K
209 M e r i d i a n I I U s e r M a n u a l
S P E C I F I C A T I O N S
1 PPS or 10 MPPS Pulse Rates:
Rate: Factory preset to a pulse rate of 1 PPS or 10 MPPS.
Duty Cycle: 50% except for the 1PPS which mimics the standard 1PPS Output.
Stability: TDEV < 10 ns, τ < 10
5
seconds, σ
y
(
τ
) < 6.0x10
-14
@
τ
=10
5
secs.
Alignment: Within 5 ns of the other TTL outputs in this unit (except DDS, if any).
Optional Telecom Clock Module:
Note: See
Chapter 10 - Rear-Panel I/O, Telecom Clock Module
for more information.
Composite Clock:
Quantity: 0, 1 or 2.
Type: Transformer-coupled complementary-pair via 2xRJ48C. Single-ended via 2xBNC.
Frequency: 64 kbps.
Synchronization: Phase locked to the Meridian II TimeBase 10 MHz.
Data Format: All ones. User-selectable bipolar violation (BPV).
Line Z: 110Ω nominal (complementary pair), or 75Ω nominal (single-ended).
Pulse Shape: Conforms to ITU-T G.703.
Pulse Amplitude: 3.4V pk into 133Ω, 3.0V pk into 110Ω, 2.4V pk into 75Ω.
MTIE/Jitter/Wander: Conforms to ITU-T G.811/G.823.
Line Code: Bipolar Return To Zero, Alternate Mark Inversion (AMI), 5/8 Duty Cycle.
User-selectable for 64kcc AMI with no BPV, 64kcc AMI with 8 kHz BPV,
or 64kcc with 8 kHz BPV and missing BPV at 400 Hz.
Alarm Code: User-selectable for BPV off (AIS) at Major (Blue) Alarm, or BPV always on.
All zeros (LoS) at Critical (Red) Alarm.
Connector: RJ-45 style modular jack (RJ48C-compatible), 1 per output,
or BNC (single-ended) or DB9M.
RJ48C Pinout: Pin 4 is Clock Out Ring (-). Pin 5 is Clock Out Tip (+).
DB9M Pinout: Pins 1, 5, 7 and 8 are Ground. Pin 2 is Clock Out Ring A (-). Pin 3 is No Connect.
Pin 4 is Clock Out Ring B (-). Pin 6 is Clock Out Tip A (+). Pin 9 is Clock Out Tip B (+).
E1 Clock Output:
Quantity: 0, 1 or 2.
Type: Transformer-coupled complementary-pair via 2xRJ48c or 1xDB9M. Single-ended via 2xBNC.
Frequency: 2.048 Mbps.
Synchronization: Phase locked to the Meridian II TimeBase 10 MHz.
Data Format: All ones. User-selectable for Unframed, Double-frame or CRC4 Multi-frame.
Line Z: 120Ω nominal (complementary pair), or 75Ω nominal (single-ended).
Pulse Shape: Conforms to ITU-T G.703.
Pulse Amplitude: 3.0V pk into 120Ω, 2.2V pk into 75Ω.
MTIE/Jitter/Wander: Conforms to ITU-T G.811/G.823.
Line Code: Bipolar Return To Zero, Alternate Mark Inversion (AMI)
(Identical to HDB3 for all ones data.)
Alarm Code: User-selectable for Alarm Indication Signal (AIS),
or Status Sync Messaging (SSM) on Sa4 through Sa8, or none at Major (Blue) Alarm.
All zeros (LoS) at Critical (Red) Alarm.
Connector: RJ-45 style modular jack (RJ48C-compatible), 1 per output,
or BNC (single-ended) or DB9M.
RJ48C Pinout: Pin 4 is Clock Out Ring (-). Pin 5 is Clock Out Tip (+).
DB9M Pinout: Pins 1, 5, 7 and 8 are Ground. Pin 2 is Clock Out Ring A (-). Pin 3 is No Connect.
Pin 4 is Clock Out Ring B (-). Pin 6 is Clock Out Tip A (+). Pin 9 is Clock Out Tip B (+).