1-50
General Information
Specifications
Internal Filters:
A number of internal filters are
available to band limit the demodulated
jitter signal before jitter amplitude
measurement. These filters are as
specified in ITU O.171.
*
Filter tested to be within 10% of nominal.
**
Minimum frequency for the 3dB points.
***
Options A3L, A3V and A3N only.
For high pass filters the slope below the
3 dB point is 20 dB per decade. For the
low pass filters the slope above the 3 dB
point is 60 dB per decade.
The filters can be selected as follows
• OFF
•LP
• HP1
• HP2
• LP HP1
• LP + HP2
• 12 kHz
The 12 kHz filter is not characterised
for pk-pk measurements, hence
operation is not specified. (This filter is
not recommended in any relevant
ITU-T pk-pk measurement standard).
RMS Jitter Measurement (Options
A3L, A3V and A3N only):
This measurement is available at all
interface rates.
Filters: 12 kHz HP filter selectable.
If HP1, HP2 and/or LP are enabled,
then they will affect the jitter signal
measured by the RMS receiver.
RMS Results Resolution: The RMS
ranges are linked to the selection for
Peak. No separate selection will exist.
Peak Range 1.6 UI: - RMS range 0.5,
steps of 0.002 UI.
Peak Range 16 UI:- RMS Range 5,
steps of 0.02 UI.
Nominal 3 dB Corner Frequencies
Filter (kb/s)
HP1
*
(high pass) (Hz)
HP2
*
(high pass) (kHz)
LP
**
(low pass) (kHz)
2048 20 18 100
8448 20 80 400
34368 100 10 800
139264 200 10 3500
155520 500 65
***
1300
622080 1000 250
***
5000
To Next Page
Loading...
Need help?
General
