IF Ports
External reference
Modulator Specifications
Output Power Level
Output Level Stability
Transmit Filtering

 

[Viterbi, rate ½, ¾, or

, k = 7 to IESS 308/309, 3 bit soft decision

 

decoding]

 

 

[Sequential rate ½, ¾, or

to IESS 312, 2 bit soft decision decoding]

Reed-Solomon outer FEC

[Concatenated Reed Solomon outer codec to IESS 308/310] [Optional

 

variable code rate]

 

Reed-Solomon, Turbo, TCM, Viterbi, & Sequential are independent FEC options, all

may be fitted simultaneously.

 

Scrambling

 

 

IBS/SMS

Synchronised to framing, per IESS 309

IDR & Closed Net

With RS Coding: synchronised to RS overhead.

 

No RS Coding, non Turbo:ffV.35 self synchronising.

 

No RS Coding, Turbo: Synchronous 212-1 (sync to TPC block alignment).

Closed Net plus ESC

32kbps or above, synchronised to ESC overhead. Less than 32kbps, as

 

per Closed Network.

 

V.35 scrambler has CCITT, INTELSAT, `FDC` & `Linkabit`modes

BNC female, 50 & 75 . Return loss 18dB typical.

Clocking only: 1kHz-10MHz in 1kHz steps (See Station Reference).

Clocking & Frequency: 10MHz, 0dBm ± 1dB

P300: 0 to -25dBm continuously variable in 0.1dB steps from front panel or via remote control

P310: -5 to -30dBm continuously variable in 0.1dB steps from front panel or via remote control

±0.5dB at 25 C ±10 C

6th order Butterworth, aperture and group delay equalised, INTELSAT

 

 

IESS compliant

 

 

Filter Implementation

257 tap FIR digitalSfilterS

 

 

Occupied Bandwidth

1.2 times symbol rate

 

 

Recommended

 

1.4 times symbol rate

 

 

Channel Spacing

 

 

 

 

Phase and Amplitude

± 2 degrees, ± 0.2dB, max

 

 

Accuracy

 

 

 

 

Carrier Suppression

-30dBc, min.

 

 

OutputOutput FrequencyPhase NoiseStability

As<1.0perdegreesinternalEERMSreferencedouble fromsided,0100HzC to 50to 100kHzC (See Internal Reference

 

 

below)

HandbookE

 

P300H

P300 Series Modem Installation and OperatingE

Page 24

Page 24
Image 24
Paradise P300 Scrambling, Filter Implementation, Occupied Bandwidth, Recommended, Channel Spacing Phase and Amplitude