Paradise Datacom P300-VSAT Installation & Operating Handbook page 26

Monitor Functions
Clocking and Buffering
Clock Loops
Tx Clocking
Rx Clocking
Station References inputs
Buffer Size
Framing & Deframing
Formats
P300H
Measured FEC input BER (raw channel, not TCM)
Estimated FEC output BER (not TCM)
Measured Reed-Solomon input BER
Estimated Reed-Solomon output BER
Measured deframer FAW BER
Measured Eb/No ( not based on channel BER, range: 3.0-15.0 dB,
accuracy ±0.2 dB).
Measured frequency offset (± 100 Hz resolution)
Frequency locked loops give phase hit immune operation even with poor
clock sources such as routers etc.
Internal ± 1 ppm stability (see Station Reference)
External - tracking range ±100 ppm / min.
Rx Timing - slaves Tx internally generated timing from Rx clocking
whatever Rx clocking mode is selected eg with Rx=Satellite for loop
timing (with full asymmetric rate capability), or with Rx=Station for
both Tx & Rx clocking slaved to Station Clock (again with full
asymmetric rate capability).
Clock from satellite (Buffer disable)
Transmit input clock - (plesiochronous, includes full asymmetric rate
operation)
Internal reference ± 1 ppm
DCE External timing clock (DTE interface only).
Station reference (see below)
$
75 BNC female, transformer isolated 1MHz to 10MHz in 1kHz steps
(accepts sinusoid >0dBm or squarewave eg G.703 para 10)
$
120 RS422 compatible input, 1kHz to 10MHz in 1kHz steps
When set to 10MHz, the station reference may replace internal 1ppm
reference to all internal circuitry (eg IF synths). The unit automatically
switches back to the internal 1ppm reference if the station reference fails.
Selectable in 1 ms increments from 0 to 99 ms. Automatically adjusted
to slip an integer multiple of terrestrial multiframe length for framed rates
(T1/E1).
Buffer storage is 32kBytes, so above 2.6 Mbps max buffer size reduces
linearly from 99 ms to 52ms at 5.0Mbps
Closed Network (unframed)
Closed Net plus ESC [Async ESC Feature] provides variable rate async
ESC, optional synchronous scrambler above 32kbps to replace error
multiplying V.35 scrambler, optional backward alarm facility, and optional
P300 Modem Installation and Operating Handbook Page 26